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[openeuler:OLK-5.10 2968/2968] ld.lld: error: version script assignment of 'LINUX_2.6' to symbol '__vdso_sgx_enter_enclave' failed: symbol not defined
by kernel test robot 16 Jun '25

16 Jun '25

Hi Sean, FYI, the error/warning still remains. tree: https://gitee.com/openeuler/kernel.git OLK-5.10 head: 49ad0aeea0747f589e03fb0959d5582f166c8fdf commit: 5476cb89ef2297bd36f8b38e27b54617b6f63236 [2968/2968] x86/vdso: Implement a vDSO for Intel SGX enclave call config: x86_64-allnoconfig (https://download.01.org/0day-ci/archive/20250616/202506161236.gXbjokCw-lkp@…) compiler: clang version 20.1.2 (https://github.com/llvm/llvm-project 58df0ef89dd64126512e4ee27b4ac3fd8ddf6247) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250616/202506161236.gXbjokCw-lkp@…) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp(a)intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202506161236.gXbjokCw-lkp@intel.com/ All errors (new ones prefixed by >>): >> ld.lld: error: version script assignment of 'LINUX_2.6' to symbol '__vdso_sgx_enter_enclave' failed: symbol not defined llvm-objdump: error: 'arch/x86/entry/vdso/vdso64.so.dbg': No such file or directory -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki

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[openeuler:OLK-6.6 2392/2392] drivers/net/ethernet/linkdata/sxe/sxepf/sxe_main.c:3: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst
by kernel test robot 16 Jun '25

16 Jun '25

tree: https://gitee.com/openeuler/kernel.git OLK-6.6 head: 93509d36bc89182689dc1bc16b348878b867f166 commit: a29c130b6607ab7a2d7e6df8625494cdafc6d736 [2392/2392] Linkdata：net：fix sxe compile errors 'sxe_resume' defined but not used config: arm64-randconfig-004-20250616 (https://download.01.org/0day-ci/archive/20250616/202506161212.8FdTH8ys-lkp@…) compiler: aarch64-linux-gcc (GCC) 7.5.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250616/202506161212.8FdTH8ys-lkp@…) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp(a)intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202506161212.8FdTH8ys-lkp@intel.com/ All warnings (new ones prefixed by >>): >> drivers/net/ethernet/linkdata/sxe/sxepf/sxe_main.c:3: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst * Copyright (C), 2020, Linkdata Technologies Co., Ltd. Kconfig warnings: (for reference only) WARNING: unmet direct dependencies detected for PTP_1588_CLOCK Depends on [n]: NET [=y] && POSIX_TIMERS [=n] Selected by [m]: - SXE [=m] && NETDEVICES [=y] && ETHERNET [=y] && NET_VENDOR_LINKDATA [=y] && (X86 || ARM64 [=y]) && PCI [=y] - SXE_VF [=m] && NETDEVICES [=y] && ETHERNET [=y] && NET_VENDOR_LINKDATA [=y] && (X86 || ARM64 [=y]) && PCI [=y] WARNING: unmet direct dependencies detected for HALTPOLL_CPUIDLE Depends on [n]: CPU_IDLE [=n] && ARCH_CPUIDLE_HALTPOLL [=y] && ARCH_HAS_OPTIMIZED_POLL [=y] Selected by [y]: - ARM64 [=y] vim +3 drivers/net/ethernet/linkdata/sxe/sxepf/sxe_main.c dd013ad487534c liujie_answer 2025-04-15 @3 * Copyright (C), 2020, Linkdata Technologies Co., Ltd. dd013ad487534c liujie_answer 2025-04-15 4 * dd013ad487534c liujie_answer 2025-04-15 5 * @file: sxe_main.c dd013ad487534c liujie_answer 2025-04-15 6 * @author: Linkdata dd013ad487534c liujie_answer 2025-04-15 7 * @date: 2025.02.16 dd013ad487534c liujie_answer 2025-04-15 8 * @brief: dd013ad487534c liujie_answer 2025-04-15 9 * @note: dd013ad487534c liujie_answer 2025-04-15 10 */ dd013ad487534c liujie_answer 2025-04-15 11 #include <linux/kernel.h> dd013ad487534c liujie_answer 2025-04-15 12 #include <linux/pci.h> dd013ad487534c liujie_answer 2025-04-15 13 #include <linux/moduleparam.h> dd013ad487534c liujie_answer 2025-04-15 14 #include <linux/module.h> dd013ad487534c liujie_answer 2025-04-15 15 #include <linux/netdevice.h> dd013ad487534c liujie_answer 2025-04-15 16 #include <linux/etherdevice.h> dd013ad487534c liujie_answer 2025-04-15 17 #include <net/rtnetlink.h> dd013ad487534c liujie_answer 2025-04-15 18 #include <linux/moduleparam.h> dd013ad487534c liujie_answer 2025-04-15 19 #include <linux/aer.h> dd013ad487534c liujie_answer 2025-04-15 20 :::::: The code at line 3 was first introduced by commit :::::: dd013ad487534c1838afc2f55efdb5daec15aace Ethernet: Linkdata: Supports Linkdata ethernet Controllers :::::: TO: liujie_answer <liujie5(a)linkdatatechnology.com> :::::: CC: liujie_answer <liujie5(a)linkdatatechnology.com> -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki

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[openeuler:OLK-5.10 2968/2968] drivers/net/ethernet/linkdata/sxe/sxepf/sxe_main.c:48: warning: Excess function parameter 'file' description in 'SXE_MSG_LEVEL_DEFAULT'
by kernel test robot 16 Jun '25

16 Jun '25

tree: https://gitee.com/openeuler/kernel.git OLK-5.10 head: 49ad0aeea0747f589e03fb0959d5582f166c8fdf commit: 3c27aa8f615da8e36e1dc802839c98702187757c [2968/2968] Linkdata：net：fix sxe compile errors 'sxe_resume' defined but not used config: arm64-randconfig-004-20250616 (https://download.01.org/0day-ci/archive/20250616/202506161252.osClELwQ-lkp@…) compiler: aarch64-linux-gcc (GCC) 7.5.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250616/202506161252.osClELwQ-lkp@…) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp(a)intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202506161252.osClELwQ-lkp@intel.com/ All warnings (new ones prefixed by >>): >> drivers/net/ethernet/linkdata/sxe/sxepf/sxe_main.c:48: warning: Excess function parameter 'file' description in 'SXE_MSG_LEVEL_DEFAULT' >> drivers/net/ethernet/linkdata/sxe/sxepf/sxe_main.c:48: warning: Excess function parameter 'author' description in 'SXE_MSG_LEVEL_DEFAULT' >> drivers/net/ethernet/linkdata/sxe/sxepf/sxe_main.c:48: warning: Excess function parameter 'date' description in 'SXE_MSG_LEVEL_DEFAULT' Kconfig warnings: (for reference only) WARNING: unmet direct dependencies detected for PTP_1588_CLOCK Depends on [n]: NET [=y] && POSIX_TIMERS [=n] Selected by [m]: - SXE [=m] && NETDEVICES [=y] && ETHERNET [=y] && NET_VENDOR_LINKDATA [=y] && (X86 || ARM64 [=y]) && PCI [=y] - SXE_VF [=m] && NETDEVICES [=y] && ETHERNET [=y] && NET_VENDOR_LINKDATA [=y] && (X86 || ARM64 [=y]) && PCI [=y] vim +48 drivers/net/ethernet/linkdata/sxe/sxepf/sxe_main.c 8cee206b555824 liujie_answer 2025-04-01 47 8cee206b555824 liujie_answer 2025-04-01 @48 #define SXE_MSG_LEVEL_DEFAULT (NETIF_MSG_DRV | NETIF_MSG_PROBE | NETIF_MSG_LINK) 8cee206b555824 liujie_answer 2025-04-01 49 :::::: The code at line 48 was first introduced by commit :::::: 8cee206b5558245197158bd20895f95cc28d8468 Ethernet: Linkdata: Supports Linkdata ethernet Controllers :::::: TO: liujie_answer <liujie5(a)linkdatatechnology.com> :::::: CC: liujie_answer <liujie5(a)linkdatatechnology.com> -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki

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[PATCH OLK-6.6 0/2] Fix issues of nfs mounting
by Li Lingfeng 16 Jun '25

16 Jun '25

Li Lingfeng (2): nfs: clear SB_RDONLY before getting superblock nfs: ignore SB_RDONLY when remounting nfs fs/nfs/super.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) -- 2.46.1

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[PATCH OLK-6.6 v2 0/3] Fix file content inconsistency issue and incorporate subsequent fix patches
by Li Lingfeng 16 Jun '25

16 Jun '25

Changes in v2: Remove the unnecessary patch. NeilBrown (3): NFS: add atomic_open for NFSv3 to handle O_TRUNC correctly. NFS: abort nfs_atomic_open_v23 if name is too long. vfs: generate FS_CREATE before FS_OPEN when ->atomic_open used. fs/namei.c | 10 ++++++-- fs/nfs/dir.c | 57 +++++++++++++++++++++++++++++++++++++++--- fs/nfs/nfs3proc.c | 1 + fs/nfs/proc.c | 1 + fs/open.c | 22 ++++++++++------ include/linux/nfs_fs.h | 3 +++ 6 files changed, 82 insertions(+), 12 deletions(-) -- 2.31.1

2 4

[PATCH OLK-5.10] usb: cdc-acm: Check control transfer buffer size before access
by Yuntao Liu 16 Jun '25

16 Jun '25

From: Jann Horn <jannh(a)google.com> stable inclusion from stable-v5.10.235 commit 90dd2f1b7342b9a671a5ea4160f408037b92b118 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/IBO4LT CVE: CVE-2025-21704 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id… -------------------------------- commit e563b01208f4d1f609bcab13333b6c0e24ce6a01 upstream. If the first fragment is shorter than struct usb_cdc_notification, we can't calculate an expected_size. Log an error and discard the notification instead of reading lengths from memory outside the received data, which can lead to memory corruption when the expected_size decreases between fragments, causing `expected_size - acm->nb_index` to wrap. This issue has been present since the beginning of git history; however, it only leads to memory corruption since commit ea2583529cd1 ("cdc-acm: reassemble fragmented notifications"). A mitigating factor is that acm_ctrl_irq() can only execute after userspace has opened /dev/ttyACM*; but if ModemManager is running, ModemManager will do that automatically depending on the USB device's vendor/product IDs and its other interfaces. Cc: stable <stable(a)kernel.org> Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Signed-off-by: Jann Horn <jannh(a)google.com> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> Signed-off-by: Yuntao Liu <liuyuntao12(a)huawei.com> --- drivers/usb/class/cdc-acm.c | 17 ++++++++++++++--- 1 file changed, 14 insertions(+), 3 deletions(-) diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c index 4e4a71307d63..6fbc54957fb4 100644 --- a/drivers/usb/class/cdc-acm.c +++ b/drivers/usb/class/cdc-acm.c @@ -360,7 +360,7 @@ static void acm_process_notification(struct acm *acm, unsigned char *buf) static void acm_ctrl_irq(struct urb *urb) { struct acm *acm = urb->context; - struct usb_cdc_notification *dr = urb->transfer_buffer; + struct usb_cdc_notification *dr; unsigned int current_size = urb->actual_length; unsigned int expected_size, copy_size, alloc_size; int retval; @@ -387,9 +387,20 @@ static void acm_ctrl_irq(struct urb *urb) usb_mark_last_busy(acm->dev); - if (acm->nb_index) + if (acm->nb_index == 0) { + /* + * The first chunk of a message must contain at least the + * notification header with the length field, otherwise we + * can't get an expected_size. + */ + if (current_size < sizeof(struct usb_cdc_notification)) { + dev_dbg(&acm->control->dev, "urb too short\n"); + goto exit; + } + dr = urb->transfer_buffer; + } else { dr = (struct usb_cdc_notification *)acm->notification_buffer; - + } /* size = notification-header + (optional) data */ expected_size = sizeof(struct usb_cdc_notification) + le16_to_cpu(dr->wLength); -- 2.34.1

2 1

[openeuler:OLK-5.10 2818/2818] ../lib/gcc/aarch64-linux/5.5.0/plugin/include/config/elfos.h:102:21: warning: invalid suffix on literal; C++11 requires a space between literal and string macro
by kernel test robot 15 Jun '25

15 Jun '25

tree: https://gitee.com/openeuler/kernel.git OLK-5.10 head: bc09ecf9f11065377a74188caeca6254830ca706 commit: 0908fe0570df658beb3866ddcb7bc55b0fb834b0 [2818/2818] gcc-plugins: fix gcc 11 indigestion with plugins... config: arm64-randconfig-002-20250321 (https://download.01.org/0day-ci/archive/20250615/202506150431.zSbZGyvK-lkp@…) compiler: aarch64-linux-gcc (GCC) 5.5.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250615/202506150431.zSbZGyvK-lkp@…) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp(a)intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202506150431.zSbZGyvK-lkp@intel.com/ All warnings (new ones prefixed by >>): In file included from ../lib/gcc/aarch64-linux/5.5.0/plugin/include/tm.h:24, from ../lib/gcc/aarch64-linux/5.5.0/plugin/include/gcc-plugin.h:31, from ../lib/gcc/aarch64-linux/5.5.0/plugin/include/plugin.h:23, from scripts/gcc-plugins/gcc-common.h:9, from scripts/gcc-plugins/randomize_layout_plugin.c:19: >> ../lib/gcc/aarch64-linux/5.5.0/plugin/include/config/elfos.h:102:21: warning: invalid suffix on literal; C++11 requires a space between literal and string macro [-Wliteral-suffix] 102 | fprintf ((FILE), "%s"HOST_WIDE_INT_PRINT_UNSIGNED"\n",\ | ^ ../lib/gcc/aarch64-linux/5.5.0/plugin/include/config/elfos.h:170:24: warning: invalid suffix on literal; C++11 requires a space between literal and string macro [-Wliteral-suffix] 170 | fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED",%u\n", \ | ^ In file included from ../lib/gcc/aarch64-linux/5.5.0/plugin/include/tm.h:24, from ../lib/gcc/aarch64-linux/5.5.0/plugin/include/gcc-plugin.h:31, from ../lib/gcc/aarch64-linux/5.5.0/plugin/include/plugin.h:23, from scripts/gcc-plugins/gcc-common.h:9, from scripts/gcc-plugins/stackleak_plugin.c:30: >> ../lib/gcc/aarch64-linux/5.5.0/plugin/include/config/elfos.h:102:21: warning: invalid suffix on literal; C++11 requires a space between literal and string macro [-Wliteral-suffix] 102 | fprintf ((FILE), "%s"HOST_WIDE_INT_PRINT_UNSIGNED"\n",\ | ^ ../lib/gcc/aarch64-linux/5.5.0/plugin/include/config/elfos.h:170:24: warning: invalid suffix on literal; C++11 requires a space between literal and string macro [-Wliteral-suffix] 170 | fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED",%u\n", \ | ^ In file included from ../lib/gcc/aarch64-linux/5.5.0/plugin/include/tm.h:41: >> ../lib/gcc/aarch64-linux/5.5.0/plugin/include/defaults.h:126:24: warning: invalid suffix on literal; C++11 requires a space between literal and string macro [-Wliteral-suffix] 126 | fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED",%u\n", \ | ^ In file included from ../lib/gcc/aarch64-linux/5.5.0/plugin/include/tm.h:41: >> ../lib/gcc/aarch64-linux/5.5.0/plugin/include/defaults.h:126:24: warning: invalid suffix on literal; C++11 requires a space between literal and string macro [-Wliteral-suffix] 126 | fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED",%u\n", \ | ^ In file included from ../lib/gcc/aarch64-linux/5.5.0/plugin/include/tm.h:24, from ../lib/gcc/aarch64-linux/5.5.0/plugin/include/gcc-plugin.h:31, from ../lib/gcc/aarch64-linux/5.5.0/plugin/include/plugin.h:23, from scripts/gcc-plugins/gcc-common.h:9, from scripts/gcc-plugins/sancov_plugin.c:22: >> ../lib/gcc/aarch64-linux/5.5.0/plugin/include/config/elfos.h:102:21: warning: invalid suffix on literal; C++11 requires a space between literal and string macro [-Wliteral-suffix] 102 | fprintf ((FILE), "%s"HOST_WIDE_INT_PRINT_UNSIGNED"\n",\ | ^ ../lib/gcc/aarch64-linux/5.5.0/plugin/include/config/elfos.h:170:24: warning: invalid suffix on literal; C++11 requires a space between literal and string macro [-Wliteral-suffix] 170 | fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED",%u\n", \ | ^ In file included from ../lib/gcc/aarch64-linux/5.5.0/plugin/include/tm.h:41: >> ../lib/gcc/aarch64-linux/5.5.0/plugin/include/defaults.h:126:24: warning: invalid suffix on literal; C++11 requires a space between literal and string macro [-Wliteral-suffix] 126 | fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED",%u\n", \ | ^ ../libexec/gcc/aarch64-linux/5.5.0/cc1: error while loading shared libraries: libmpfr.so.4: cannot open shared object file: No such file or directory make[2]: *** [scripts/Makefile.build:280: scripts/mod/empty.o] Error 1 shuffle=1096673560 ../libexec/gcc/aarch64-linux/5.5.0/cc1: error while loading shared libraries: libmpfr.so.4: cannot open shared object file: No such file or directory make[2]: *** [scripts/Makefile.build:117: scripts/mod/devicetable-offsets.s] Error 1 shuffle=1096673560 make[2]: Target '__build' not remade because of errors. make[1]: *** [Makefile:1214: prepare0] Error 2 shuffle=1096673560 make[1]: Target 'prepare' not remade because of errors. make: *** [Makefile:185: __sub-make] Error 2 shuffle=1096673560 make: Target 'prepare' not remade because of errors. -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki

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[PATCH OLK-6.6] af_unix: Read 0 bytes with MSG_PEEK loops if last skb is OOB
by Zhang Changzhong 14 Jun '25

14 Jun '25

hulk inclusion category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/ICE10B -------------------------------------- recv(0, MSG_PEEK) loops if OOB skb is the last but not first skb in sk_receive_queue, after first skb is peeked, manage_oob() skip OOB skb and set skb = NULL, unix_stream_data_wait() returns immediately and jump to redo label because last != tail, then unix_stream_read_generic() loop forever unless new normal data arrives. The following procedure can reproduce the issue: send(sv[0], "a", 1, 0) send(sv[0], "a", 1, MSG_OOB) recv(sv[1], buf, 0, MSG_PEEK) Fixes: 22dd70eb2c3d ("af_unix: Don't peek OOB data without MSG_OOB.") Signed-off-by: Zhang Changzhong <zhangchangzhong(a)huawei.com> --- net/unix/af_unix.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c index ab23c8d..26c23f5 100644 --- a/net/unix/af_unix.c +++ b/net/unix/af_unix.c @@ -2708,7 +2708,7 @@ static int unix_stream_read_generic(struct unix_stream_read_state *state, #if IS_ENABLED(CONFIG_AF_UNIX_OOB) if (skb) { skb = manage_oob(skb, sk, flags, copied); - if (!skb && copied) { + if (!skb && (copied || !size)) { unix_state_unlock(sk); break; } -- 2.9.5

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[PATCH OLK-5.10 v10 00/13] arm64: Support xcall prefetch
by Jinjie Ruan 14 Jun '25

14 Jun '25

Support xcall prefetch. Changes in v10: - Use void * in task_struct for xcall and introduce TASK_XINFO macro. - Use %pK intead of %p in tracepoint. Changes in v9: - Add static key for xcall enable to reduce the overhead of checking xcall startup parameters, which also fix the system_supports_xcall() check stall bug when kernel start. - cleanup. Changes in v8: - Support xcall prefetch on and off runtime. - Refactor the xcall proc interface code, move to /fs/proc/proc_xcall.c. - Fix xint irqnr_xint_map array out of bounds access problem in __handle_domain_irq() by introducing is_hwirq_xint() helper. - Introduce system_supports_xint() and system_supports_xcall() to reduce the overhead, and remove fast_syscall_enabeld(), remove extern is_xint_support. - Limit the task xinfo alloc and xcall prefetch init by system_supports_xcall() to reduce the overhead. Changes in v7: - Remove "echo @xxx > /proc/$PID/xcall" usage, replace with "echo 1 > /proc/$PID/prefetch". Now the xcall enable and prefetch can be enabled separately. Changes in v6: - Only use one reserved kabi in task_struct for xcall. - Free prefetch item after eventpoll_release_file() to avoid possible competition between ep_prefetch_item_enqueue() and pfi free. - Fix "echo > /proc/xcall/cpu_list" show problem. Changes in v5: - Fix dentry free before free_prefetch_item() and then UAF in prefetch work by cancel_work_sync() before free pfi and move free_prefetch_item() to the first of __fput(). - Fix __queue_work() oops bug. - /proc/xcall/mask_list -> /proc/xcall/cpu_list - Fix xcall_prefetch print data type. - Update prefetch tracepoint, move xcall points definition to separete header file. - Make xcall_prefetch depends on EPOLL. - Adjust xcall prefetch buf to 16KB by default. - Add xcall_prefetch_init() function. - Only use write lock in free_prefetch_item(). - Simplify xcall_read() and add some comment. - Update commit message. Changes in v4: - Enable FAST_SYSCALL/IRQ and XCALL_PREFETCH by default. - Fix xint sleeping function called from invalid context bug. - free_prefetch_item() in file_free() instead of filp_close(), which fix the alloc-queue and free competition. - Fix kernel_read() warning for FMODE_READ not set. - Add sock_from_file() limit for prefetch. - Check NULL for rc_work. - Simplfy the cpumask interface code, and rename to "/proc/xcall/mask_list". - Remove the xcall_cache_pages_order interface. - tracepoint update: fd -> file. - Simplify the xcall_read() function again. - Handle copy_to_user() return value. - Remove unused XCALL_CACHE_QUEUED. - Update the commit message. Changes in v3: - Add XCALL_PREFETCH config to isolate feature code. - Split the /proc/xxx interface code out to independent patches, which will make it clear. - Update the cpumask interface to "/proc/xcall/numa_mask", and it can set the numa mask of all numas one time. - Add xcall select count to make xcall_cache_pages_order adjust safe. - Introduce xcall_read_start/end() to make it clear. - Simplify the xcall_read() function. - Use cpumask_next() instead of get_nth_cpu_in_cpumask() function. - Use independent cpu select policy function. - Remove some unnecessary pr_err(). - Update the commit message. Changes in v2: - Upadte the xcall prefetch state machine, remove the queued state and add prefetch, cancel states. - Remove the pfi lock and use atomic variables. - Change the 'xcall select' semantics and simplify the code a lot. - Remove keep_running, remove unrelated code. - Remove the count in struct read_cache_entry, and use percpu hit/miss count. - Remove sync mode, so remove struct read_cache_entry in struct task_struct. - Use hash table to find prefetch item for a file, which will not change the file struct KABI. - Use rwlock instead of spinlock for hash table. - Use alloc_page() instead kmalloc() to align 4KB. - Update the commit message. Jinjie Ruan (10): arm64: Introduce Xint software solution arm64: Add debugfs dir for xint arm64: Refactor the xcall proc code arm64: Reserve a kabi in task_struct exclusively for xcall arm64: Introduce xcall prefetch enable interface eventpoll: Support xcall async prefetch eventpoll: Add /proc/xcall/prefetch dir for performance tuning eventpoll: Add /proc/xcall/cpu_list for performance tuning xcall: Add tracepoints for different prefetching stages config: Enable FAST_SYSCALL/IRQ and XCALL_PREFETCH by default Liao Chen (1): arm64: revert kpti bypass Yipeng Zou (2): arm64: Introduce xcall a faster svc exception handling arm64: Faster SVC exception handler with xcall arch/Kconfig | 81 +++++ arch/arm64/Kconfig | 2 + arch/arm64/configs/openeuler_defconfig | 7 + arch/arm64/include/asm/cpucaps.h | 2 + arch/arm64/include/asm/cpufeature.h | 12 + arch/arm64/include/asm/exception.h | 3 + arch/arm64/include/asm/xcall.h | 23 ++ arch/arm64/kernel/Makefile | 1 + arch/arm64/kernel/asm-offsets.c | 3 + arch/arm64/kernel/cpufeature.c | 51 +++ arch/arm64/kernel/entry-common.c | 22 ++ arch/arm64/kernel/entry.S | 183 ++++++++++- arch/arm64/kernel/syscall.c | 57 ++++ arch/arm64/kernel/xcall.c | 38 +++ drivers/irqchip/irq-gic-v3.c | 145 +++++++++ fs/eventpoll.c | 412 +++++++++++++++++++++++++ fs/file_table.c | 1 + fs/proc/Makefile | 1 + fs/proc/base.c | 6 + fs/proc/internal.h | 7 + fs/proc/proc_xcall.c | 185 +++++++++++ fs/read_write.c | 10 +- include/linux/fs.h | 35 +++ include/linux/hardirq.h | 5 + include/linux/irqchip/arm-gic-v3.h | 12 + include/linux/sched.h | 4 + include/trace/events/xcall.h | 106 +++++++ kernel/fork.c | 19 ++ kernel/irq/debugfs.c | 36 +++ kernel/irq/internals.h | 16 + kernel/irq/irqdesc.c | 19 ++ kernel/irq/proc.c | 10 + kernel/softirq.c | 73 +++++ 33 files changed, 1584 insertions(+), 3 deletions(-) create mode 100644 arch/arm64/include/asm/xcall.h create mode 100644 arch/arm64/kernel/xcall.c create mode 100644 fs/proc/proc_xcall.c create mode 100644 include/trace/events/xcall.h -- 2.34.1

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[PATCH OLK-6.6] mempolicy: optimize queue_folios_pte_range by PTE batching
by Tong Tiangen 14 Jun '25

14 Jun '25

From: Dev Jain <dev.jain(a)arm.com> mainline inclusion from mainline-v6.16-rc1 commit 4a34c584d8cd13d2b721d21cf629f77c60bfb4a4 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/ICF4UI CVE: NA Reference:https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.gi… ------------------------------------------- After the check for queue_folio_required(), the code only cares about the folio in the for loop, i.e the PTEs are redundant. Therefore, optimize this loop by skipping over a PTE batch mapping the same folio. With a test program migrating pages of the calling process, which includes a mapped VMA of size 4GB with pte-mapped large folios of order-9, and migrating once back and forth node-0 and node-1, the average execution time reduces from 7.5 to 4 seconds, giving an approx 47% speedup. Link: https://lkml.kernel.org/r/20250416053048.96479-1-dev.jain@arm.com Signed-off-by: Dev Jain <dev.jain(a)arm.com> Acked-by: David Hildenbrand <david(a)redhat.com> Cc: Baolin Wang <baolin.wang(a)linux.alibaba.com> Cc: Hugh Dickins <hughd(a)google.com> Cc: Matthew Wilcox (Oracle) <willy(a)infradead.org> Cc: Ryan Roberts <ryan.roberts(a)arm.com> Cc: Vishal Moola (Oracle) <vishal.moola(a)gmail.com> Cc: Yang Shi <yang(a)os.amperecomputing.com> Cc: Zi Yan <ziy(a)nvidia.com> Signed-off-by: Andrew Morton <akpm(a)linux-foundation.org> Conflicts: mm/mempolicy.c [qp->nr_failed is introduced in 1cb5d11a370f, which is not merged.] Signed-off-by: Tong Tiangen <tongtiangen(a)huawei.com> --- mm/mempolicy.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/mm/mempolicy.c b/mm/mempolicy.c index 88f0bb008efd..1587efaf777e 100644 --- a/mm/mempolicy.c +++ b/mm/mempolicy.c @@ -508,6 +508,7 @@ static int queue_folios_pmd(pmd_t *pmd, spinlock_t *ptl, unsigned long addr, static int queue_folios_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end, struct mm_walk *walk) { + const fpb_t fpb_flags = FPB_IGNORE_DIRTY | FPB_IGNORE_SOFT_DIRTY; struct vm_area_struct *vma = walk->vma; struct folio *folio; struct queue_pages *qp = walk->private; @@ -515,6 +516,7 @@ static int queue_folios_pte_range(pmd_t *pmd, unsigned long addr, pte_t *pte, *mapped_pte; pte_t ptent; spinlock_t *ptl; + int max_nr, nr; ptl = pmd_trans_huge_lock(pmd, vma); if (ptl) @@ -525,13 +527,19 @@ static int queue_folios_pte_range(pmd_t *pmd, unsigned long addr, walk->action = ACTION_AGAIN; return 0; } - for (; addr != end; pte++, addr += PAGE_SIZE) { + for (; addr != end; pte += nr, addr += nr * PAGE_SIZE) { + max_nr = (end - addr) >> PAGE_SHIFT; + nr = 1; ptent = ptep_get(pte); if (!pte_present(ptent)) continue; folio = vm_normal_folio(vma, addr, ptent); if (!folio || folio_is_zone_device(folio)) continue; + if (folio_test_large(folio) && max_nr != 1) + nr = folio_pte_batch(folio, addr, pte, ptent, + max_nr, fpb_flags, + NULL, NULL, NULL); /* * vm_normal_folio() filters out zero pages, but there might * still be reserved folios to skip, perhaps in a VDSO. -- 2.25.1

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