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[PATCH 0/4] Free cached iovas when rmmod the driver of the last device in group
by chenxiang 08 Jun '21

08 Jun '21

From: Xiang Chen <chenxiang66(a)hisilicon.com> When rmmod the driver of the last device in the group, cached iovas are not used, and it is better to free them to save memories. And also export function free_rcache_cached_iovas() and iommu_domain_to_iova(). Xiang Chen (4): iommu/iova: add a function to free all rcached iovas and export it iommu/iova: use function free_rcache_cached_iovas() to free all rcached iovas dma-iommu: add a interface to get iova_domain from iommu domain iommu: free cached iovas when rmmod the driver of the last device in the group drivers/iommu/dma-iommu.c | 7 +++++++ drivers/iommu/iommu.c | 7 +++++++ drivers/iommu/iova.c | 17 ++++++++++++----- include/linux/dma-iommu.h | 6 ++++++ include/linux/iova.h | 5 +++++ 5 files changed, 37 insertions(+), 5 deletions(-) -- 2.8.1

3 7

[PATCH v6] ACPI / APEI: fix the regression of synchronous external aborts occur in user-mode
by Xiaofei Tan 08 Jun '21

08 Jun '21

Before commit 8fcc4ae6faf8 ("arm64: acpi: Make apei_claim_sea() synchronise with APEI's irq work"), do_sea() would unconditionally signal the affected task from the arch code. Since that change, the GHES driver sends the signals. This exposes a problem as errors the GHES driver doesn't understand or doesn't handle effectively are silently ignored. It will cause the errors get taken again, and circulate endlessly. User-space task get stuck in this loop. Existing firmware on Kunpeng9xx systems reports cache errors with the 'ARM Processor Error' CPER records. Do memory failure handling for ARM Processor Error Section just like for Memory Error Section. Signed-off-by: Xiaofei Tan <tanxiaofei(a)huawei.com> Reviewed-by: James Morse <james.morse(a)arm.com> --- Changes since v5: - Do some changes following James's suggestions: 1) optimize commit log 2) use err_info->length instead of err_info++' 3) some coding style advice. Changes since v4: - 1. Change the patch name from " ACPI / APEI: do memory failure on the physical address reported by ARM processor error section" to this more proper one. - 2. Add a comment in the code to tell why not filter out corrected error in an uncorrected section. Changes since v3: - Print unhandled error following James Morse's advice. Changes since v2: - Updated commit log --- drivers/acpi/apei/ghes.c | 81 ++++++++++++++++++++++++++++++++++++++---------- 1 file changed, 64 insertions(+), 17 deletions(-) diff --git a/drivers/acpi/apei/ghes.c b/drivers/acpi/apei/ghes.c index fce7ade..0c8330e 100644 --- a/drivers/acpi/apei/ghes.c +++ b/drivers/acpi/apei/ghes.c @@ -441,28 +441,35 @@ static void ghes_kick_task_work(struct callback_head *head) gen_pool_free(ghes_estatus_pool, (unsigned long)estatus_node, node_len); } -static bool ghes_handle_memory_failure(struct acpi_hest_generic_data *gdata, - int sev) +static bool ghes_do_memory_failure(u64 physical_addr, int flags) { unsigned long pfn; - int flags = -1; - int sec_sev = ghes_severity(gdata->error_severity); - struct cper_sec_mem_err *mem_err = acpi_hest_get_payload(gdata); if (!IS_ENABLED(CONFIG_ACPI_APEI_MEMORY_FAILURE)) return false; - if (!(mem_err->validation_bits & CPER_MEM_VALID_PA)) - return false; - - pfn = mem_err->physical_addr >> PAGE_SHIFT; + pfn = PHYS_PFN(physical_addr); if (!pfn_valid(pfn)) { pr_warn_ratelimited(FW_WARN GHES_PFX "Invalid address in generic error data: %#llx\n", - mem_err->physical_addr); + physical_addr); return false; } + memory_failure_queue(pfn, flags); + return true; +} + +static bool ghes_handle_memory_failure(struct acpi_hest_generic_data *gdata, + int sev) +{ + int flags = -1; + int sec_sev = ghes_severity(gdata->error_severity); + struct cper_sec_mem_err *mem_err = acpi_hest_get_payload(gdata); + + if (!(mem_err->validation_bits & CPER_MEM_VALID_PA)) + return false; + /* iff following two events can be handled properly by now */ if (sec_sev == GHES_SEV_CORRECTED && (gdata->flags & CPER_SEC_ERROR_THRESHOLD_EXCEEDED)) @@ -470,14 +477,56 @@ static bool ghes_handle_memory_failure(struct acpi_hest_generic_data *gdata, if (sev == GHES_SEV_RECOVERABLE && sec_sev == GHES_SEV_RECOVERABLE) flags = 0; - if (flags != -1) { - memory_failure_queue(pfn, flags); - return true; - } + if (flags != -1) + return ghes_do_memory_failure(mem_err->physical_addr, flags); return false; } +static bool ghes_handle_arm_hw_error(struct acpi_hest_generic_data *gdata, int sev) +{ + struct cper_sec_proc_arm *err = acpi_hest_get_payload(gdata); + bool queued = false; + int sec_sev, i; + char *p; + + log_arm_hw_error(err); + + sec_sev = ghes_severity(gdata->error_severity); + if (sev != GHES_SEV_RECOVERABLE || sec_sev != GHES_SEV_RECOVERABLE) + return false; + + p = (char *)(err + 1); + for (i = 0; i < err->err_info_num; i++) { + struct cper_arm_err_info *err_info = (struct cper_arm_err_info *)p; + bool is_cache = (err_info->type == CPER_ARM_CACHE_ERROR); + bool has_pa = (err_info->validation_bits & CPER_ARM_INFO_VALID_PHYSICAL_ADDR); + const char *error_type = "unknown error"; + + /* + * The field (err_info->error_info & BIT(26)) is fixed to set to + * 1 in some old firmware of HiSilicon Kunpeng920. We assume that + * firmware won't mix corrected errors in an uncorrected section, + * and don't filter out 'corrected' error here. + */ + if (is_cache && has_pa) { + queued = ghes_do_memory_failure(err_info->physical_fault_addr, 0); + p += err_info->length; + continue; + } + + if (err_info->type < ARRAY_SIZE(cper_proc_error_type_strs)) + error_type = cper_proc_error_type_strs[err_info->type]; + + pr_warn_ratelimited(FW_WARN GHES_PFX + "Unhandled processor error type: %s\n", + error_type); + p += err_info->length; + } + + return queued; +} + /* * PCIe AER errors need to be sent to the AER driver for reporting and * recovery. The GHES severities map to the following AER severities and @@ -605,9 +654,7 @@ static bool ghes_do_proc(struct ghes *ghes, ghes_handle_aer(gdata); } else if (guid_equal(sec_type, &CPER_SEC_PROC_ARM)) { - struct cper_sec_proc_arm *err = acpi_hest_get_payload(gdata); - - log_arm_hw_error(err); + queued = ghes_handle_arm_hw_error(gdata, sev); } else { void *err = acpi_hest_get_payload(gdata); -- 2.8.1

1 0

[PATCH v6 1/1] ACPI / APEI: fix the regression of synchronous external aborts occur in user-mode
by Xiaofei Tan 08 Jun '21

08 Jun '21

Before commit 8fcc4ae6faf8 ("arm64: acpi: Make apei_claim_sea() synchronise with APEI's irq work"), do_sea() would unconditionally signal the affected task from the arch code. Since that change, the GHES driver sends the signals. This exposes a problem as errors the GHES driver doesn't understand or doesn't handle effectively are silently ignored. It will cause the errors get taken again, and circulate endlessly. User-space task get stuck in this loop. Existing firmware on Kunpeng9xx systems reports cache errors with the 'ARM Processor Error' CPER records. Do memory failure handling for ARM Processor Error Section just like for Memory Error Section. Signed-off-by: Xiaofei Tan <tanxiaofei(a)huawei.com> Reviewed-by: James Morse <james.morse(a)arm.com> --- Chnages since v5: - Do some changes following James's suggestions: 1) optimize commit log 2) check error info length 3) some coding style advices. Changes since v4: - 1. Change the patch name from " ACPI / APEI: do memory failure on the physical address reported by ARM processor error section" to this more proper one. - 2. Add a comment in the code to tell why not filter out corrected error in an uncorrected section. Changes since v3: - Print unhandled error following James Morse's advice. Changes since v2: - Updated commit log --- drivers/acpi/apei/ghes.c | 85 ++++++++++++++++++++++++++++++++++++++---------- 1 file changed, 68 insertions(+), 17 deletions(-) diff --git a/drivers/acpi/apei/ghes.c b/drivers/acpi/apei/ghes.c index fce7ade..da25870 100644 --- a/drivers/acpi/apei/ghes.c +++ b/drivers/acpi/apei/ghes.c @@ -441,28 +441,35 @@ static void ghes_kick_task_work(struct callback_head *head) gen_pool_free(ghes_estatus_pool, (unsigned long)estatus_node, node_len); } -static bool ghes_handle_memory_failure(struct acpi_hest_generic_data *gdata, - int sev) +static bool ghes_do_memory_failure(u64 physical_addr, int flags) { unsigned long pfn; - int flags = -1; - int sec_sev = ghes_severity(gdata->error_severity); - struct cper_sec_mem_err *mem_err = acpi_hest_get_payload(gdata); if (!IS_ENABLED(CONFIG_ACPI_APEI_MEMORY_FAILURE)) return false; - if (!(mem_err->validation_bits & CPER_MEM_VALID_PA)) - return false; - - pfn = mem_err->physical_addr >> PAGE_SHIFT; + pfn = PHYS_PFN(physical_addr); if (!pfn_valid(pfn)) { pr_warn_ratelimited(FW_WARN GHES_PFX "Invalid address in generic error data: %#llx\n", - mem_err->physical_addr); + physical_addr); return false; } + memory_failure_queue(pfn, flags); + return true; +} + +static bool ghes_handle_memory_failure(struct acpi_hest_generic_data *gdata, + int sev) +{ + int flags = -1; + int sec_sev = ghes_severity(gdata->error_severity); + struct cper_sec_mem_err *mem_err = acpi_hest_get_payload(gdata); + + if (!(mem_err->validation_bits & CPER_MEM_VALID_PA)) + return false; + /* iff following two events can be handled properly by now */ if (sec_sev == GHES_SEV_CORRECTED && (gdata->flags & CPER_SEC_ERROR_THRESHOLD_EXCEEDED)) @@ -470,14 +477,60 @@ static bool ghes_handle_memory_failure(struct acpi_hest_generic_data *gdata, if (sev == GHES_SEV_RECOVERABLE && sec_sev == GHES_SEV_RECOVERABLE) flags = 0; - if (flags != -1) { - memory_failure_queue(pfn, flags); - return true; - } + if (flags != -1) + return ghes_do_memory_failure(mem_err->physical_addr, flags); return false; } +static bool ghes_handle_arm_hw_error(struct acpi_hest_generic_data *gdata, int sev) +{ + struct cper_sec_proc_arm *err = acpi_hest_get_payload(gdata); + struct cper_arm_err_info *err_info; + bool queued = false; + int sec_sev, i; + + log_arm_hw_error(err); + + sec_sev = ghes_severity(gdata->error_severity); + if (sev != GHES_SEV_RECOVERABLE || sec_sev != GHES_SEV_RECOVERABLE) + return false; + + err_info = (struct cper_arm_err_info *)(err + 1); + for (i = 0; i < err->err_info_num; i++, err_info++) { + bool is_cache = (err_info->type == CPER_ARM_CACHE_ERROR); + bool has_pa = (err_info->validation_bits & CPER_ARM_INFO_VALID_PHYSICAL_ADDR); + const char *error_type = "unknown error"; + + if (err_info->length != sizeof(struct cper_arm_err_info)) { + pr_warn_ratelimited(FW_WARN GHES_PFX + "Error info length %d is invalid\n", + err_info->length); + break; + } + + /* + * The field (err_info->error_info & BIT(26)) is fixed to set to + * 1 in some old firmware of HiSilicon Kunpeng920. We assume that + * firmware won't mix corrected errors in an uncorrected section, + * and don't filter out 'corrected' error here. + */ + if (is_cache && has_pa) { + queued = ghes_do_memory_failure(err_info->physical_fault_addr, 0); + continue; + } + + if (err_info->type < ARRAY_SIZE(cper_proc_error_type_strs)) + error_type = cper_proc_error_type_strs[err_info->type]; + + pr_warn_ratelimited(FW_WARN GHES_PFX + "Unhandled processor error type: %s\n", + error_type); + } + + return queued; +} + /* * PCIe AER errors need to be sent to the AER driver for reporting and * recovery. The GHES severities map to the following AER severities and @@ -605,9 +658,7 @@ static bool ghes_do_proc(struct ghes *ghes, ghes_handle_aer(gdata); } else if (guid_equal(sec_type, &CPER_SEC_PROC_ARM)) { - struct cper_sec_proc_arm *err = acpi_hest_get_payload(gdata); - - log_arm_hw_error(err); + queued = ghes_handle_arm_hw_error(gdata, sev); } else { void *err = acpi_hest_get_payload(gdata); -- 2.8.1

2 2

[RESEND PATCH v3] iommu/iova: put free_iova_mem() outside of spinlock iova_rbtree_lock
by chenxiang 04 Jun '21

04 Jun '21

From: Xiang Chen <chenxiang66(a)hisilicon.com> It is not necessary to put free_iova_mem() inside of spinlock/unlock iova_rbtree_lock which only leads to more completion for the spinlock. It has a small promote on the performance after the change. And also rename private_free_iova() as remove_iova() because the function will not free iova after that change. Signed-off-by: Xiang Chen <chenxiang66(a)hisilicon.com> Reviewed-by: John Garry <john.garry(a)huawei.com> --- drivers/iommu/iova.c | 18 +++++++++++------- 1 file changed, 11 insertions(+), 7 deletions(-) diff --git a/drivers/iommu/iova.c b/drivers/iommu/iova.c index b7ecd5b..b6cf5f1 100644 --- a/drivers/iommu/iova.c +++ b/drivers/iommu/iova.c @@ -412,12 +412,11 @@ private_find_iova(struct iova_domain *iovad, unsigned long pfn) return NULL; } -static void private_free_iova(struct iova_domain *iovad, struct iova *iova) +static void remove_iova(struct iova_domain *iovad, struct iova *iova) { assert_spin_locked(&iovad->iova_rbtree_lock); __cached_rbnode_delete_update(iovad, iova); rb_erase(&iova->node, &iovad->rbroot); - free_iova_mem(iova); } /** @@ -452,8 +451,9 @@ __free_iova(struct iova_domain *iovad, struct iova *iova) unsigned long flags; spin_lock_irqsave(&iovad->iova_rbtree_lock, flags); - private_free_iova(iovad, iova); + remove_iova(iovad, iova); spin_unlock_irqrestore(&iovad->iova_rbtree_lock, flags); + free_iova_mem(iova); } EXPORT_SYMBOL_GPL(__free_iova); @@ -472,10 +472,13 @@ free_iova(struct iova_domain *iovad, unsigned long pfn) spin_lock_irqsave(&iovad->iova_rbtree_lock, flags); iova = private_find_iova(iovad, pfn); - if (iova) - private_free_iova(iovad, iova); + if (!iova) { + spin_unlock_irqrestore(&iovad->iova_rbtree_lock, flags); + return; + } + remove_iova(iovad, iova); spin_unlock_irqrestore(&iovad->iova_rbtree_lock, flags); - + free_iova_mem(iova); } EXPORT_SYMBOL_GPL(free_iova); @@ -825,7 +828,8 @@ iova_magazine_free_pfns(struct iova_magazine *mag, struct iova_domain *iovad) if (WARN_ON(!iova)) continue; - private_free_iova(iovad, iova); + remove_iova(iovad, iova); + free_iova_mem(iova); } spin_unlock_irqrestore(&iovad->iova_rbtree_lock, flags); -- 2.8.1

3 2

[PATCH net-next 0/3] Some optimization for lockless qdisc
by Yunsheng Lin 03 Jun '21

03 Jun '21

Patch 1: remove unnecessary seqcount operation. Patch 2: implement TCQ_F_CAN_BYPASS. Patch 3: remove qdisc->empty. Performance data for pktgen in queue_xmit mode + dummy netdev with pfifo_fast: threads unpatched patched delta 1 2.60Mpps 3.21Mpps +23% 2 3.84Mpps 5.56Mpps +44% 4 5.52Mpps 5.58Mpps +1% 8 2.77Mpps 2.76Mpps -0.3% 16 2.24Mpps 2.23Mpps +0.4% Performance for IP forward testing: 1.05Mpps increases to 1.16Mpps, about 10% improvement. V1: Drop RFC tag, Add nolock_qdisc_is_empty() and do the qdisc empty checking without the protection of qdisc->seqlock to aviod doing unnecessary spin_trylock() for contention case. RFC v4: Use STATE_MISSED and STATE_DRAINING to indicate non-empty qdisc, and add patch 1 and 3. Yunsheng Lin (3): net: sched: avoid unnecessary seqcount operation for lockless qdisc net: sched: implement TCQ_F_CAN_BYPASS for lockless qdisc net: sched: remove qdisc->empty for lockless qdisc include/net/sch_generic.h | 31 ++++++++++++++++++------------- net/core/dev.c | 26 ++++++++++++++++++++++++-- net/sched/sch_generic.c | 23 ++++++++++++++++------- 3 files changed, 58 insertions(+), 22 deletions(-) -- 2.7.4

3 18

[PATCH v2 0/3] use bin_attribute to avoid buff overflow
by Tian Tao 02 Jun '21

02 Jun '21

patch #1 adds a new function cpumap_print_to_buf and patch #2 uses this function in drivers/base/topology.c, and patch #3 uses this new function in drivers/base/node.c. v2: split the original patch #1 into two patches and use kasprintf() in patch #1 to simplify the code. do some minor formatting adjustments Tian Tao (3): lib: bitmap: introduce bitmap_print_to_buf topology: use bin_attribute to avoid buff overflow drivers/base/node.c: use bin_attribute to avoid buff overflow drivers/base/node.c | 52 ++++++++++++++-------- drivers/base/topology.c | 115 ++++++++++++++++++++++++++---------------------- include/linux/bitmap.h | 3 ++ include/linux/cpumask.h | 21 +++++++++ lib/bitmap.c | 38 +++++++++++++++- 5 files changed, 157 insertions(+), 72 deletions(-) -- 2.7.4

2 4

[RFC v2 plinth/topic-sas-5.12 0/6] Add support for IOMMU debugfs related to
by chenxiang 02 Jun '21

02 Jun '21

From: Xiang Chen <chenxiang66(a)hisilicon.com> The first patch is to release those rcache when rmmod the driver of the last device to save memory. And patch2~6 is add support for IOMMU debugfs related to IOVA as follows: /sys/kernel/debug/iommu/iovad/iommu_domainx Under iommu_domainx dir, add debugfs file iova_rcache and drop_rcache. From debugfs file iova_rcache, we can get how many cpu_rcache / share rcache / iovas are used, and also we can drop those rcache by debugfs file drop_rcache: For cpu_rcache, [i]=x|y indicates that there are x iova in load iova_magazine and y iova in prev iova_magazine (128 at most). For share rcache, [i]=x indicates that there are x iova_magazines in use. estuary:/sys/kernel/debug/iommu/iovad/iommu_domain2$ cat iova_rcache [ 272.814457] cpu0 [0]=60|0 [1]=7|0 [2]=32|0 [3]=0|0 [4]=97|0 [5]=104|0 [ 272.820982] cpu1 [0]=0|0 [1]=3|0 [2]=14|0 [3]=76|0 [4]=15|0 [5]=64|0 [ 272.827399] cpu2 [0]=85|128 [1]=84|128 [2]=83|128 [3]=112|128 [4]=22|128 [5]=116|128 [ 272.835197] cpu3 [0]=0|0 [1]=91|0 [2]=101|0 [3]=29|0 [4]=0|0 [5]=36|0 [ 272.841699] cpu4 [0]=0|0 [1]=39|0 [2]=113|0 [3]=75|0 [4]=95|0 [5]=0|0 [ 272.848201] cpu5 [0]=27|0 [1]=48|0 [2]=82|0 [3]=0|0 [4]=19|0 [5]=36|0 [ 272.854702] cpu6 [0]=30|0 [1]=0|0 [2]=48|0 [3]=2|0 [4]=18|0 [5]=56|0 [ 272.861117] cpu7 [0]=27|0 [1]=89|0 [2]=101|0 [3]=59|0 [4]=28|0 [5]=0|0 [ 272.867706] cpu8 [0]=66|0 [1]=114|0 [2]=42|0 [3]=123|0 [4]=96|0 [5]=68|0 [ 272.874466] cpu9 [0]=71|0 [1]=61|0 [2]=28|0 [3]=118|0 [4]=116|0 [5]=41|0 [ 272.881227] cpu10 [0]=83|128 [1]=63|128 [2]=109|128 [3]=79|128 [4]=7|128 [5]=54|128 [ 272.888938] cpu11 [0]=90|0 [1]=34|0 [2]=88|0 [3]=58|0 [4]=20|0 [5]=35|0 [ 272.895611] cpu12 [0]=64|0 [1]=20|0 [2]=18|0 [3]=33|0 [4]=42|0 [5]=22|0 [ 272.902285] cpu13 [0]=17|0 [1]=70|0 [2]=115|0 [3]=59|0 [4]=108|0 [5]=58|0 [ 272.909132] cpu14 [0]=28|0 [1]=18|0 [2]=27|0 [3]=105|0 [4]=65|0 [5]=81|0 [ 272.915892] cpu15 [0]=75|0 [1]=3|0 [2]=73|0 [3]=104|0 [4]=127|0 [5]=102|0 [ 272.922738] cpu16 [0]=54|0 [1]=116|0 [2]=90|0 [3]=31|0 [4]=108|0 [5]=41|0 [ 272.929590] cpu17 [0]=47|0 [1]=82|0 [2]=3|0 [3]=66|0 [4]=68|0 [5]=66|0 [ 272.936179] cpu18 [0]=126|128 [1]=110|128 [2]=48|128 [3]=118|128 [4]=54|128 [5]=73|128 [ 272.944156] cpu19 [0]=31|0 [1]=13|0 [2]=104|0 [3]=45|0 [4]=108|0 [5]=96|0 [ 272.951006] cpu20 [0]=58|0 [1]=113|0 [2]=14|0 [3]=123|0 [4]=52|0 [5]=54|0 [ 272.957856] cpu21 [0]=116|0 [1]=47|0 [2]=96|0 [3]=60|0 [4]=47|0 [5]=126|0 [ 272.964701] cpu22 [0]=84|0 [1]=87|0 [2]=88|0 [3]=68|0 [4]=37|0 [5]=119|0 [ 272.971462] cpu23 [0]=13|0 [1]=63|0 [2]=124|0 [3]=3|0 [4]=7|0 [5]=38|0 [ 272.978051] cpu24 [0]=15|0 [1]=64|0 [2]=65|0 [3]=53|0 [4]=102|0 [5]=69|0 [ 272.984812] cpu25 [0]=94|0 [1]=108|0 [2]=67|0 [3]=125|0 [4]=107|0 [5]=8|0 [ 272.991663] cpu26 [0]=84|128 [1]=86|128 [2]=91|128 [3]=121|128 [4]=77|128 [5]=25|128 [ 272.999464] cpu27 [0]=60|0 [1]=105|0 [2]=61|0 [3]=91|0 [4]=79|0 [5]=6|0 [ 273.006141] cpu28 [0]=39|0 [1]=91|0 [2]=11|0 [3]=87|0 [4]=112|0 [5]=10|0 [ 273.012904] cpu29 [0]=88|0 [1]=43|0 [2]=0|0 [3]=77|0 [4]=10|0 [5]=79|0 [ 273.019492] cpu30 [0]=65|0 [1]=24|0 [2]=125|0 [3]=24|0 [4]=54|0 [5]=21|0 [ 273.026254] cpu31 [0]=26|0 [1]=90|0 [2]=42|0 [3]=17|0 [4]=73|0 [5]=35|0 [ 273.032929] cpu32 [0]=1|0 [1]=83|0 [2]=76|0 [3]=62|0 [4]=117|0 [5]=96|0 [ 273.039612] cpu33 [0]=50|0 [1]=55|0 [2]=63|0 [3]=79|0 [4]=86|0 [5]=15|0 [ 273.046293] cpu34 [0]=122|128 [1]=36|128 [2]=36|128 [3]=79|128 [4]=113|128 [5]=80|128 [ 273.054179] cpu35 [0]=101|0 [1]=18|0 [2]=7|0 [3]=10|0 [4]=7|0 [5]=112|0 [ 273.060854] cpu36 [0]=12|0 [1]=107|0 [2]=43|0 [3]=60|0 [4]=19|0 [5]=110|0 [ 273.067703] cpu37 [0]=90|0 [1]=34|0 [2]=66|0 [3]=91|0 [4]=85|0 [5]=31|0 [ 273.074378] cpu38 [0]=0|0 [1]=22|0 [2]=18|0 [3]=73|0 [4]=54|0 [5]=96|0 [ 273.080968] cpu39 [0]=109|0 [1]=54|0 [2]=124|0 [3]=21|0 [4]=88|0 [5]=61|0 [ 273.087816] cpu40 [0]=95|0 [1]=50|0 [2]=45|0 [3]=66|0 [4]=30|0 [5]=84|0 [ 273.094490] cpu41 [0]=99|0 [1]=47|0 [2]=8|0 [3]=81|0 [4]=0|0 [5]=95|0 [ 273.100992] cpu42 [0]=25|128 [1]=92|128 [2]=53|128 [3]=49|128 [4]=43|128 [5]=78|128 [ 273.108704] cpu43 [0]=88|0 [1]=42|0 [2]=10|0 [3]=124|0 [4]=4|0 [5]=105|0 [ 273.115464] cpu44 [0]=80|0 [1]=63|0 [2]=1|0 [3]=123|0 [4]=35|0 [5]=17|0 [ 273.122139] cpu45 [0]=31|0 [1]=92|0 [2]=8|0 [3]=60|0 [4]=74|0 [5]=92|0 [ 273.128727] cpu46 [0]=78|0 [1]=40|0 [2]=95|0 [3]=33|0 [4]=67|0 [5]=63|0 [ 273.135401] cpu47 [0]=112|0 [1]=93|0 [2]=96|0 [3]=24|0 [4]=93|0 [5]=15|0 [ 273.142162] cpu48 [0]=92|0 [1]=120|0 [2]=49|0 [3]=118|0 [4]=1|0 [5]=83|0 [ 273.148923] cpu49 [0]=101|0 [1]=7|0 [2]=108|0 [3]=15|0 [4]=69|0 [5]=116|0 [ 273.155771] cpu50 [0]=111|128 [1]=98|128 [2]=21|128 [3]=27|128 [4]=109|128 [5]=21|128 [ 273.163655] cpu51 [0]=31|0 [1]=33|0 [2]=82|0 [3]=117|0 [4]=98|0 [5]=1|0 [ 273.170329] cpu52 [0]=113|0 [1]=64|0 [2]=16|0 [3]=48|0 [4]=97|0 [5]=80|0 [ 273.177090] cpu53 [0]=95|0 [1]=39|0 [2]=26|0 [3]=107|0 [4]=2|0 [5]=18|0 [ 273.183764] cpu54 [0]=114|0 [1]=94|0 [2]=110|0 [3]=85|0 [4]=66|0 [5]=45|0 [ 273.190611] cpu55 [0]=52|0 [1]=89|0 [2]=43|0 [3]=117|0 [4]=115|0 [5]=91|0 [ 273.197460] cpu56 [0]=0|0 [1]=51|0 [2]=81|0 [3]=60|0 [4]=20|0 [5]=27|0 [ 273.204048] cpu57 [0]=124|0 [1]=121|0 [2]=56|0 [3]=0|0 [4]=77|0 [5]=59|0 [ 273.210807] cpu58 [0]=109|128 [1]=98|128 [2]=6|128 [3]=39|128 [4]=64|128 [5]=24|128 [ 273.218518] cpu59 [0]=57|0 [1]=62|0 [2]=66|0 [3]=55|0 [4]=95|0 [5]=47|0 [ 273.225192] cpu60 [0]=29|0 [1]=12|0 [2]=112|0 [3]=23|0 [4]=65|0 [5]=34|0 [ 273.231955] cpu61 [0]=92|0 [1]=5|0 [2]=19|0 [3]=91|0 [4]=101|0 [5]=97|0 [ 273.238629] cpu62 [0]=97|0 [1]=42|0 [2]=30|0 [3]=111|0 [4]=99|0 [5]=2|0 [ 273.245304] cpu63 [0]=77|0 [1]=79|0 [2]=62|0 [3]=56|0 [4]=17|0 [5]=76|0 [ 273.251982] cpu64 [0]=0|0 [1]=108|0 [2]=87|0 [3]=58|0 [4]=26|0 [5]=0|0 [ 273.258582] cpu65 [0]=0|0 [1]=114|0 [2]=99|0 [3]=73|0 [4]=33|0 [5]=0|0 [ 273.265174] cpu66 [0]=39|128 [1]=52|128 [2]=82|128 [3]=107|128 [4]=73|128 [5]=13|128 [ 273.272974] cpu67 [0]=0|0 [1]=123|0 [2]=87|0 [3]=49|0 [4]=27|0 [5]=98|0 [ 273.279651] cpu68 [0]=108|0 [1]=0|0 [2]=123|0 [3]=47|0 [4]=30|0 [5]=109|0 [ 273.286500] cpu69 [0]=92|0 [1]=110|0 [2]=92|0 [3]=59|0 [4]=42|0 [5]=104|0 [ 273.293351] cpu70 [0]=105|0 [1]=106|0 [2]=99|0 [3]=57|0 [4]=15|0 [5]=111|0 [ 273.300287] cpu71 [0]=106|0 [1]=108|0 [2]=108|0 [3]=58|0 [4]=35|0 [5]=98|0 [ 273.307222] cpu72 [0]=0|0 [1]=0|0 [2]=114|0 [3]=118|0 [4]=95|0 [5]=0|0 [ 273.313813] cpu73 [0]=0|0 [1]=0|0 [2]=0|0 [3]=98|0 [4]=95|0 [5]=124|0 [ 273.320318] cpu74 [0]=65|0 [1]=76|0 [2]=109|0 [3]=58|128 [4]=115|128 [5]=105|0 [ 273.327603] cpu75 [0]=0|0 [1]=0|0 [2]=123|0 [3]=102|0 [4]=109|0 [5]=0|0 [ 273.334279] cpu76 [0]=125|0 [1]=0|0 [2]=0|0 [3]=101|0 [4]=112|0 [5]=0|0 [ 273.340954] cpu77 [0]=124|0 [1]=124|0 [2]=0|0 [3]=103|0 [4]=100|0 [5]=0|0 [ 273.347803] cpu78 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=118|0 [5]=0|0 [ 273.354134] cpu79 [0]=124|0 [1]=0|0 [2]=116|0 [3]=104|0 [4]=120|0 [5]=0|0 [ 273.360981] cpu80 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 273.367138] cpu81 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 273.373292] cpu82 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 273.379447] cpu83 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 273.385601] cpu84 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 273.391755] cpu85 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 273.397910] cpu86 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 273.404065] cpu87 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 273.410220] cpu88 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 273.416376] cpu89 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 273.422532] cpu90 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 273.428687] cpu91 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 273.434841] cpu92 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 273.440997] cpu93 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 273.447152] cpu94 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 273.453311] cpu95 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 273.459468] cpu96 [0]=78|0 [1]=95|0 [2]=117|0 [3]=120|0 [4]=37|0 [5]=31|0 [ 273.466317] cpu97 [0]=105|0 [1]=99|0 [2]=37|0 [3]=24|0 [4]=86|0 [5]=39|0 [ 273.473080] cpu98 [0]=37|128 [1]=13|128 [2]=102|128 [3]=124|128 [4]=60|128 [5]=36|128 [ 273.480967] cpu99 [0]=69|0 [1]=12|0 [2]=84|0 [3]=49|0 [4]=108|0 [5]=127|0 [ 273.487818] cpu100 [0]=92|0 [1]=104|0 [2]=22|0 [3]=31|0 [4]=2|0 [5]=72|0 [ 273.494581] cpu101 [0]=0|0 [1]=31|0 [2]=44|0 [3]=8|0 [4]=13|0 [5]=50|0 [ 273.501170] cpu102 [0]=79|0 [1]=14|0 [2]=88|0 [3]=53|0 [4]=7|0 [5]=44|0 [ 273.507846] cpu103 [0]=10|0 [1]=117|0 [2]=53|0 [3]=112|0 [4]=11|0 [5]=71|0 [ 273.514781] cpu104 [0]=123|0 [1]=30|0 [2]=9|0 [3]=2|0 [4]=30|0 [5]=24|0 [ 273.521462] cpu105 [0]=116|0 [1]=44|0 [2]=29|0 [3]=104|0 [4]=71|0 [5]=3|0 [ 273.528309] cpu106 [0]=38|128 [1]=127|128 [2]=21|128 [3]=83|128 [4]=59|128 [5]=81|128 [ 273.536195] cpu107 [0]=127|0 [1]=126|0 [2]=125|0 [3]=79|0 [4]=12|0 [5]=115|0 [ 273.543303] cpu108 [0]=0|0 [1]=43|0 [2]=111|0 [3]=10|0 [4]=51|0 [5]=68|0 [ 273.550065] cpu109 [0]=37|0 [1]=63|0 [2]=11|0 [3]=10|0 [4]=58|0 [5]=9|0 [ 273.556742] cpu110 [0]=86|0 [1]=44|0 [2]=83|0 [3]=85|0 [4]=82|0 [5]=119|0 [ 273.563590] cpu111 [0]=114|0 [1]=27|0 [2]=111|0 [3]=11|0 [4]=45|0 [5]=56|0 [ 273.570524] cpu112 [0]=74|0 [1]=86|0 [2]=93|0 [3]=122|0 [4]=126|0 [5]=31|0 [ 273.577458] cpu113 [0]=51|0 [1]=81|0 [2]=7|0 [3]=124|0 [4]=71|0 [5]=5|0 [ 273.584133] cpu114 [0]=58|128 [1]=95|128 [2]=14|128 [3]=119|128 [4]=85|128 [5]=23|128 [ 273.592018] cpu115 [0]=59|0 [1]=66|0 [2]=1|0 [3]=50|0 [4]=77|0 [5]=6|0 [ 273.598607] cpu116 [0]=65|0 [1]=81|0 [2]=22|0 [3]=18|0 [4]=96|0 [5]=2|0 [ 273.605282] cpu117 [0]=23|0 [1]=41|0 [2]=19|0 [3]=69|0 [4]=108|0 [5]=126|0 [ 273.612216] cpu118 [0]=74|0 [1]=40|0 [2]=0|0 [3]=100|0 [4]=109|0 [5]=7|0 [ 273.618979] cpu119 [0]=47|0 [1]=31|0 [2]=103|0 [3]=65|0 [4]=84|0 [5]=124|0 [ 273.625914] cpu120 [0]=74|0 [1]=18|0 [2]=87|0 [3]=117|0 [4]=17|0 [5]=62|0 [ 273.632762] cpu121 [0]=64|0 [1]=73|0 [2]=3|0 [3]=127|0 [4]=120|0 [5]=105|0 [ 273.639698] cpu122 [0]=46|128 [1]=89|128 [2]=22|128 [3]=78|128 [4]=100|128 [5]=106|128 [ 273.647671] cpu123 [0]=36|0 [1]=71|0 [2]=25|0 [3]=23|0 [4]=126|0 [5]=86|0 [ 273.654521] cpu124 [0]=26|0 [1]=93|0 [2]=101|0 [3]=103|0 [4]=54|0 [5]=100|0 [ 273.661542] cpu125 [0]=58|0 [1]=57|0 [2]=116|0 [3]=35|0 [4]=73|0 [5]=12|0 [ 273.668392] cpu126 [0]=11|0 [1]=54|0 [2]=41|0 [3]=0|0 [4]=27|0 [5]=54|0 [ 273.675067] cpu127 [0]=70|0 [1]=38|0 [2]=58|0 [3]=123|0 [4]=47|0 [5]=21|0 [ 273.681913] share cache: [0]=0 [1]=4 [2]=9 [3]=3 [4]=6 [5]=5 [ 273.687633] rb_total: 59443 estuary:/sys/kernel/debug/iommu/iovad/iommu_domain2$ echo 1 > drop_rca che estuary:/sys/kernel/debug/iommu/iovad/iommu_domain2$ cat iova_rcache [ 295.489690] cpu0 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.495786] cpu1 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.501861] cpu2 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.507929] cpu3 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.514004] cpu4 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.520074] cpu5 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.526142] cpu6 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.532212] cpu7 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.538287] cpu8 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.544355] cpu9 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.550423] cpu10 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.556581] cpu11 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.562739] cpu12 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.568897] cpu13 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.575054] cpu14 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.581209] cpu15 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.587368] cpu16 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.593525] cpu17 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.599680] cpu18 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.605837] cpu19 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.611999] cpu20 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.618159] cpu21 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.624313] cpu22 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.630467] cpu23 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.636624] cpu24 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.642779] cpu25 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.648933] cpu26 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.655088] cpu27 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.661241] cpu28 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.667396] cpu29 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.673549] cpu30 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.679703] cpu31 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.685857] cpu32 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.692010] cpu33 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.698165] cpu34 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.704319] cpu35 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.710474] cpu36 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.716628] cpu37 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.722782] cpu38 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.728936] cpu39 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.735091] cpu40 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.741246] cpu41 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.747400] cpu42 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.753553] cpu43 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.759707] cpu44 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.765860] cpu45 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.772014] cpu46 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.778168] cpu47 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.784322] cpu48 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.790476] cpu49 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.796632] cpu50 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.802786] cpu51 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.808941] cpu52 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.815095] cpu53 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.821250] cpu54 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.827405] cpu55 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.833561] cpu56 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.839716] cpu57 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.845870] cpu58 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.852024] cpu59 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.858181] cpu60 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.864336] cpu61 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.870492] cpu62 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.876646] cpu63 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.882801] cpu64 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.888956] cpu65 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.895109] cpu66 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.901265] cpu67 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.907419] cpu68 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.913574] cpu69 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.919729] cpu70 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.925882] cpu71 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.932037] cpu72 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.938191] cpu73 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.944345] cpu74 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.950499] cpu75 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.956653] cpu76 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.962807] cpu77 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.968961] cpu78 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.975115] cpu79 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.981269] cpu80 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.987423] cpu81 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.993578] cpu82 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 295.999731] cpu83 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 296.005885] cpu84 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 296.012040] cpu85 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 296.018196] cpu86 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 296.024350] cpu87 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 296.030504] cpu88 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 296.036659] cpu89 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 296.042814] cpu90 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 296.048968] cpu91 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 296.055122] cpu92 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 296.061275] cpu93 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 296.067429] cpu94 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 296.073582] cpu95 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 296.079736] cpu96 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 296.085890] cpu97 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 296.092043] cpu98 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 296.098198] cpu99 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 296.104352] cpu100 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 296.110593] cpu101 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 296.116834] cpu102 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 296.123076] cpu103 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 296.129315] cpu104 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 296.135555] cpu105 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 296.141795] cpu106 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 296.148035] cpu107 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 296.154275] cpu108 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 296.160515] cpu109 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 296.166757] cpu110 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 296.172997] cpu111 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 296.179237] cpu112 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 296.185477] cpu113 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 296.191717] cpu114 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 296.197958] cpu115 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 296.204198] cpu116 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 296.210438] cpu117 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 296.216677] cpu118 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 296.222917] cpu119 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 296.229157] cpu120 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 296.235398] cpu121 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 296.241638] cpu122 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 296.247879] cpu123 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 296.254121] cpu124 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 296.260361] cpu125 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 296.266601] cpu126 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 296.272843] cpu127 [0]=0|0 [1]=0|0 [2]=0|0 [3]=0|0 [4]=0|0 [5]=0|0 [ 296.279083] share cache: [0]=0 [1]=0 [2]=0 [3]=0 [4]=0 [5]=0 [ 296.284804] rb_total: 4134 estuary:/sys/kernel/debug/iommu/iovad/iommu_domain2$ We can add more debugfs interfaces if we want to. c00284940 (6): {topost} iommu: free rcache iovas when rmmod the driver of the last device {topost} iommu/iova: create iovad debugfs dir under iommu debugfs dir {topost} iommu/iova: create iommu domain debugfs dir under iovad debugfs dir {topost} iommu/iova: create debugfs file related to iova {topost} iommu/iova: trace how many iovas are in use {topost} iommu/iova: add a debugfs file drop_rcache to drop rcache drivers/iommu/dma-iommu.c | 9 +++++ drivers/iommu/iommu-debugfs.c | 93 +++++++++++++++++++++++++++++++++++++++++++ drivers/iommu/iommu.c | 26 +++++------- drivers/iommu/iova.c | 43 ++++++++------------ include/linux/dma-iommu.h | 6 ++- include/linux/iommu.h | 32 ++++++++++++++- include/linux/iova.h | 29 +++++++++++++- 7 files changed, 193 insertions(+), 45 deletions(-) -- 2.8.1

3 10

[PATCH] libata: configure max sectors properly
by chenxiang 31 May '21

31 May '21

From: Xiang Chen <chenxiang66(a)hisilicon.com> Max sectors of limitations for scsi host can be set through scsi_host_template->max_sectors in scsi driver. But we find that max sectors may exceed scsi_host_template->max_sectors for SATA disk even if we set it. We find that it may be overwrote in some scsi drivers (which calls the callback slave_configure and also calls function ata_scsi_dev_config in it). The invoking relationship is as follows: scsi_probe_and_add_lun ... scsi_alloc_sdev scsi_mq_alloc_queue ... __scsi_init_queue blk_queue_max_hw_sectors(q, shost->max_sectors) //max_sectors coming from sht->max_sectors scsi_change_queue_depth scsi_sysfs_device_initialize shost->hostt->slave_alloc() xxx_salve_configure ... ata_scsi_dev_config blk_queue_max_hw_sectors(q, dev->max_sectors) //max_sectors is overwrote by dev->max_sectors To avoid the issue, set q->limits.max_sectors with the minimum value between dev->max_sectors and q->limits.max_sectors. Signed-off-by: Xiang Chen <chenxiang66(a)hisilicon.com> --- drivers/ata/libata-scsi.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c index 48b8934..fb7b243 100644 --- a/drivers/ata/libata-scsi.c +++ b/drivers/ata/libata-scsi.c @@ -1026,12 +1026,15 @@ EXPORT_SYMBOL_GPL(ata_scsi_dma_need_drain); int ata_scsi_dev_config(struct scsi_device *sdev, struct ata_device *dev) { struct request_queue *q = sdev->request_queue; + unsigned int max_sectors; if (!ata_id_has_unload(dev->id)) dev->flags |= ATA_DFLAG_NO_UNLOAD; /* configure max sectors */ - blk_queue_max_hw_sectors(q, dev->max_sectors); + max_sectors = min_t(unsigned int, dev->max_sectors, + q->limits.max_sectors); + blk_queue_max_hw_sectors(q, max_sectors); if (dev->class == ATA_DEV_ATAPI) { sdev->sector_size = ATA_SECT_SIZE; -- 2.8.1

3 2

[PATCH 0/2] use bin_attribute to avoid buff overflow
by Tian Tao 31 May '21

31 May '21

The first patch adds a new function cpumap_print_to_buf and uses this function in drivers/base/topology.c, and the second patch uses this new function in drivers/base/node.c Tian Tao (2): topology: use bin_attribute to avoid buff overflow drivers/base/node.c: use bin_attribute to avoid buff overflow drivers/base/node.c | 50 +++++++++++++-------- drivers/base/topology.c | 115 ++++++++++++++++++++++++++---------------------- include/linux/bitmap.h | 3 ++ include/linux/cpumask.h | 25 +++++++++++ lib/bitmap.c | 34 ++++++++++++++ 5 files changed, 157 insertions(+), 70 deletions(-) -- 2.7.4

1 2

[PATCH v8] topology: use bin_attribute to avoid buff overflow
by Tian Tao 29 May '21

29 May '21

Reading sys/devices/system/cpu/cpuX/topology/ returns cpu topology. However, the size of this file is limited to PAGE_SIZE because of the limitation for sysfs attribute. so we use bin_attribute instead of attribute to avoid NR_CPUS too big to cause buff overflow. This patch is based on the following discussion. https://www.spinics.net/lists/linux-doc/msg95921.html Signed-off-by: Tian Tao <tiantao6(a)hisilicon.com> --- v2: rewrite the function name##_read v3: remove the temp buffer. v4: rewrite the function name##_read v5: rewrite the patch v6: update the commit message v7: remove BUFF_SIZE, dynamic calculation of size v8: Extracting the public part as a subfunction --- drivers/base/topology.c | 115 ++++++++++++++++++++++++++---------------------- include/linux/bitmap.h | 3 ++ include/linux/cpumask.h | 25 +++++++++++ lib/bitmap.c | 34 ++++++++++++++ 4 files changed, 125 insertions(+), 52 deletions(-) diff --git a/drivers/base/topology.c b/drivers/base/topology.c index 4d254fc..013edbb 100644 --- a/drivers/base/topology.c +++ b/drivers/base/topology.c @@ -21,25 +21,27 @@ static ssize_t name##_show(struct device *dev, \ return sysfs_emit(buf, "%d\n", topology_##name(dev->id)); \ } -#define define_siblings_show_map(name, mask) \ -static ssize_t name##_show(struct device *dev, \ - struct device_attribute *attr, char *buf) \ -{ \ - return cpumap_print_to_pagebuf(false, buf, topology_##mask(dev->id));\ +#define define_siblings_read_func(name, mask) \ +static ssize_t name##_read(struct file *file, struct kobject *kobj, \ + struct bin_attribute *attr, char *buf, \ + loff_t off, size_t count) \ +{ \ + struct device *dev = kobj_to_dev(kobj); \ + \ + return cpumap_print_to_buf(false, buf, topology_##mask(dev->id), \ + off, count); \ +} \ + \ +static ssize_t name##_list_read(struct file *file, struct kobject *kobj, \ + struct bin_attribute *attr, char *buf, \ + loff_t off, size_t count) \ +{ \ + struct device *dev = kobj_to_dev(kobj); \ + \ + return cpumap_print_to_buf(true, buf, topology_##mask(dev->id), \ + off, count); \ } -#define define_siblings_show_list(name, mask) \ -static ssize_t name##_list_show(struct device *dev, \ - struct device_attribute *attr, \ - char *buf) \ -{ \ - return cpumap_print_to_pagebuf(true, buf, topology_##mask(dev->id));\ -} - -#define define_siblings_show_func(name, mask) \ - define_siblings_show_map(name, mask); \ - define_siblings_show_list(name, mask) - define_id_show_func(physical_package_id); static DEVICE_ATTR_RO(physical_package_id); @@ -49,71 +51,80 @@ static DEVICE_ATTR_RO(die_id); define_id_show_func(core_id); static DEVICE_ATTR_RO(core_id); -define_siblings_show_func(thread_siblings, sibling_cpumask); -static DEVICE_ATTR_RO(thread_siblings); -static DEVICE_ATTR_RO(thread_siblings_list); +define_siblings_read_func(thread_siblings, sibling_cpumask); +static BIN_ATTR_RO(thread_siblings, 0); +static BIN_ATTR_RO(thread_siblings_list, 0); -define_siblings_show_func(core_cpus, sibling_cpumask); -static DEVICE_ATTR_RO(core_cpus); -static DEVICE_ATTR_RO(core_cpus_list); +define_siblings_read_func(core_cpus, sibling_cpumask); +static BIN_ATTR_RO(core_cpus, 0); +static BIN_ATTR_RO(core_cpus_list, 0); -define_siblings_show_func(core_siblings, core_cpumask); -static DEVICE_ATTR_RO(core_siblings); -static DEVICE_ATTR_RO(core_siblings_list); +define_siblings_read_func(core_siblings, core_cpumask); +static BIN_ATTR_RO(core_siblings, 0); +static BIN_ATTR_RO(core_siblings_list, 0); -define_siblings_show_func(die_cpus, die_cpumask); -static DEVICE_ATTR_RO(die_cpus); -static DEVICE_ATTR_RO(die_cpus_list); +define_siblings_read_func(die_cpus, die_cpumask); +static BIN_ATTR_RO(die_cpus, 0); +static BIN_ATTR_RO(die_cpus_list, 0); -define_siblings_show_func(package_cpus, core_cpumask); -static DEVICE_ATTR_RO(package_cpus); -static DEVICE_ATTR_RO(package_cpus_list); +define_siblings_read_func(package_cpus, core_cpumask); +static BIN_ATTR_RO(package_cpus, 0); +static BIN_ATTR_RO(package_cpus_list, 0); #ifdef CONFIG_SCHED_BOOK define_id_show_func(book_id); static DEVICE_ATTR_RO(book_id); -define_siblings_show_func(book_siblings, book_cpumask); -static DEVICE_ATTR_RO(book_siblings); -static DEVICE_ATTR_RO(book_siblings_list); +define_siblings_read_func(book_siblings, book_cpumask); +static BIN_ATTR_RO(book_siblings, 0); +static BIN_ATTR_RO(book_siblings_list, 0); #endif #ifdef CONFIG_SCHED_DRAWER define_id_show_func(drawer_id); static DEVICE_ATTR_RO(drawer_id); -define_siblings_show_func(drawer_siblings, drawer_cpumask); -static DEVICE_ATTR_RO(drawer_siblings); -static DEVICE_ATTR_RO(drawer_siblings_list); +define_siblings_read_func(drawer_siblings, drawer_cpumask); +static BIN_ATTR_RO(drawer_siblings, 0); +static BIN_ATTR_RO(drawer_siblings_list, 0); #endif +static struct bin_attribute *bin_attrs[] = { + &bin_attr_core_cpus, + &bin_attr_core_cpus_list, + &bin_attr_thread_siblings, + &bin_attr_thread_siblings_list, + &bin_attr_core_siblings, + &bin_attr_core_siblings_list, + &bin_attr_die_cpus, + &bin_attr_die_cpus_list, + &bin_attr_package_cpus, + &bin_attr_package_cpus_list, +#ifdef CONFIG_SCHED_BOOK + &bin_attr_book_siblings, + &bin_attr_book_siblings_list, +#endif +#ifdef CONFIG_SCHED_DRAWER + &bin_attr_drawer_siblings, + &bin_attr_drawer_siblings_list, +#endif + NULL, +}; + static struct attribute *default_attrs[] = { &dev_attr_physical_package_id.attr, &dev_attr_die_id.attr, &dev_attr_core_id.attr, - &dev_attr_thread_siblings.attr, - &dev_attr_thread_siblings_list.attr, - &dev_attr_core_cpus.attr, - &dev_attr_core_cpus_list.attr, - &dev_attr_core_siblings.attr, - &dev_attr_core_siblings_list.attr, - &dev_attr_die_cpus.attr, - &dev_attr_die_cpus_list.attr, - &dev_attr_package_cpus.attr, - &dev_attr_package_cpus_list.attr, #ifdef CONFIG_SCHED_BOOK &dev_attr_book_id.attr, - &dev_attr_book_siblings.attr, - &dev_attr_book_siblings_list.attr, #endif #ifdef CONFIG_SCHED_DRAWER &dev_attr_drawer_id.attr, - &dev_attr_drawer_siblings.attr, - &dev_attr_drawer_siblings_list.attr, #endif NULL }; static const struct attribute_group topology_attr_group = { .attrs = default_attrs, + .bin_attrs = bin_attrs, .name = "topology" }; diff --git a/include/linux/bitmap.h b/include/linux/bitmap.h index 70a9324..bc401bd9b 100644 --- a/include/linux/bitmap.h +++ b/include/linux/bitmap.h @@ -219,6 +219,9 @@ extern unsigned int bitmap_ord_to_pos(const unsigned long *bitmap, unsigned int extern int bitmap_print_to_pagebuf(bool list, char *buf, const unsigned long *maskp, int nmaskbits); +extern int bitmap_print_to_buf(bool list, char *buf, + const unsigned long *maskp, int nmaskbits, loff_t off, size_t count); + #define BITMAP_FIRST_WORD_MASK(start) (~0UL << ((start) & (BITS_PER_LONG - 1))) #define BITMAP_LAST_WORD_MASK(nbits) (~0UL >> (-(nbits) & (BITS_PER_LONG - 1))) diff --git a/include/linux/cpumask.h b/include/linux/cpumask.h index 383684e..e4810b3e 100644 --- a/include/linux/cpumask.h +++ b/include/linux/cpumask.h @@ -928,6 +928,31 @@ cpumap_print_to_pagebuf(bool list, char *buf, const struct cpumask *mask) nr_cpu_ids); } +/** + * cpumap_print_to_buf - copies the cpumask into the buffer either + * as comma-separated list of cpus or hex values of cpumask + * @list: indicates whether the cpumap must be list + * @mask: the cpumask to copy + * @buf: the buffer to copy into + * @off: the offset that buffer to copy into + * @count: the count thatbuffer to copy into + * + * the role of cpumap_print_to_buf and cpumap_print_to_pagebuf is + * the same, the difference is that the second parameter of + * bitmap_print_to_buf can be more than one pagesize. + * + * Returns the length of the (null-terminated) @buf string, zero if + * nothing is copied. + */ + +static inline ssize_t +cpumap_print_to_buf(bool list, char *buf, const struct cpumask *mask, + loff_t off, size_t count) +{ + return bitmap_print_to_buf(list, buf, cpumask_bits(mask), + nr_cpu_ids, off, count); +} + #if NR_CPUS <= BITS_PER_LONG #define CPU_MASK_ALL \ (cpumask_t) { { \ diff --git a/lib/bitmap.c b/lib/bitmap.c index 75006c4..5bf89f1 100644 --- a/lib/bitmap.c +++ b/lib/bitmap.c @@ -460,6 +460,40 @@ int bitmap_parse_user(const char __user *ubuf, EXPORT_SYMBOL(bitmap_parse_user); /** + * bitmap_print_to_buf - convert bitmap to list or hex format ASCII string + * @list: indicates whether the bitmap must be list + * @buf: page aligned buffer into which string is placed + * @maskp: pointer to bitmap to convert + * @nmaskbits: size of bitmap, in bits + * @off: offset in buf + * @count: count that already output + * + * the role of bitmap_print_to_buf and bitmap_print_to_pagebuf is + * the same, the difference is that the second parameter of + * bitmap_print_to_buf can be more than one pagesize. + */ +int bitmap_print_to_buf(bool list, char *buf, const unsigned long *maskp, + int nmaskbits, loff_t off, size_t count) +{ + int len, size; + void *data; + char *fmt = list ? "%*pbl\n" : "%*pb\n"; + + len = snprintf(NULL, 0, fmt, nmaskbits, maskp); + + data = kvmalloc(len+1, GFP_KERNEL); + if (!data) + return -ENOMEM; + + size = scnprintf(data, len+1, fmt, nmaskbits, maskp); + size = memory_read_from_buffer(buf, count, &off, data, size); + kvfree(data); + + return size; +} +EXPORT_SYMBOL(bitmap_print_to_buf); + +/** * bitmap_print_to_pagebuf - convert bitmap to list or hex format ASCII string * @list: indicates whether the bitmap must be list * @buf: page aligned buffer into which string is placed -- 2.7.4

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