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[PATCH OLK-6.6 v4 00/19] Memory access profiler(SPE) driven NUMA balancing and damon
by Ze Zuo 19 May '25

19 May '25

Hi, In Arm processors, there is a hardware PMU (Performance Monitoring Unit) facility called Statistical Profiling Extension (SPE) that can gather memory access metrics. In this patchset, SPE is exploited as an access information sampling approach to drive NUMA balancing. This sampling approach is introducedto replace the method based on address space scanning and hint faults with the access information provided by the hardware. With this, it is no longer necessary for NUMA balancing to scan over the address space periodically and rely on task-to-page association built by NUMA hint faults. Instead, the access samples obtained from hardware PMU are fed to NUMA balancing as equivalents to page fault. Except for the replaced sampling approach, the rest of the NUMA balancing policy is retained to do pages and tasks migrations according to the samples. Profiling based on SPE is an valid alternative sampling approach in NUMA balancing for the optimal page and task placement. This can be also extended to other architectures as long as there is a hardware PMU that supports memory access profiling. An abstract layer mem_sampling is introduced to reserve support for other kernel features and different types of hardware PMU. To help evaluate performance of this approach in system, syctl interfaces are added to enable/disable hardware mem sampling. NUMA balancing sampling approach can be also switched back to hint-faults- based approach dynamically. TODOs Currently, SPE for NUMA balance does not support PMD-level page migration, but it will be supported in later version. changes since v3: -- fix patch 4 introduce x86 kabi issue. -- fix patch 15 build error on arm. -- some clean code. Ze Zuo (19): mm_monitor/mm_spe: Introduce standalone SPE profiling framework mm_monitor/mm_spe: Init per-CPU buffers and SPE state mm_monitor/mm_spe: Add PMU based memory sampling abstract layer mm_monitor/mm_spe: Introduce arm_spe_user to abstract SPE usage mm/mem_sampling: Add eBPF interface for memory access tracing mm/mem_sampling: Add sched switch hook to control sampling state sched: Enable per-process mem_sampling from sched switch path mm/mem_sampling:: Add proc and cmdline interface to control sampling enable mm/numa: Use mem_sampling framework for NUMA balancing mm/numa: Enable mem_sampling-based access tracking for NUMA balancing mm/mem_sampling: Add sysctl control for NUMA balancing integration mm/numa: Add tracepoints for access sampling and NUMA page migration mm/damon/vaddr: Support hardware-assisted memory access sampling mm/damon/vaddr: Extend mem_sampling sysctl to support DAMON mm/damon/vaddr: Add demotion interface for migrating cold pages to target nodemask arm-spe: Boost SPE add TLB hot page and remote access tracking arm-spe: Add kernel cmdline option to enable SPE boost arm-spe: Export boost SPE sampling info via tracefs tracepoint config: Enable memory sampling based pmu for numa balance and damon by default arch/arm64/configs/openeuler_defconfig | 4 + drivers/Kconfig | 2 + drivers/Makefile | 2 + drivers/arm/Kconfig | 2 + drivers/arm/mm_monitor/Kconfig | 20 + drivers/arm/mm_monitor/Makefile | 2 + drivers/arm/mm_monitor/mm_spe.c | 537 +++++++++++++++ drivers/arm/mm_monitor/mm_spe.h | 102 +++ drivers/arm/mm_monitor/spe-decoder/Makefile | 2 + .../mm_monitor/spe-decoder/arm-spe-decoder.c | 224 +++++++ .../mm_monitor/spe-decoder/arm-spe-decoder.h | 75 +++ .../spe-decoder/arm-spe-pkt-decoder.c | 227 +++++++ .../spe-decoder/arm-spe-pkt-decoder.h | 158 +++++ drivers/perf/arm_pmu_acpi.c | 31 + drivers/perf/arm_spe_pmu.c | 112 +++- include/linux/damon.h | 8 + include/linux/mem_sampling.h | 133 ++++ include/linux/mempolicy.h | 9 + include/linux/migrate_mode.h | 1 + include/linux/mm_types.h | 4 + include/trace/events/kmem.h | 114 ++++ include/trace/events/migrate.h | 3 +- kernel/fork.c | 3 + kernel/sched/core.c | 2 + kernel/sched/fair.c | 15 + mm/Kconfig | 28 + mm/Makefile | 1 + mm/damon/Kconfig | 14 + mm/damon/core.c | 34 + mm/damon/sysfs-schemes.c | 40 ++ mm/damon/vaddr.c | 128 ++++ mm/mem_sampling.c | 614 ++++++++++++++++++ mm/mempolicy.c | 146 +++++ 33 files changed, 2795 insertions(+), 2 deletions(-) create mode 100644 drivers/arm/Kconfig create mode 100644 drivers/arm/mm_monitor/Kconfig create mode 100644 drivers/arm/mm_monitor/Makefile create mode 100644 drivers/arm/mm_monitor/mm_spe.c create mode 100644 drivers/arm/mm_monitor/mm_spe.h create mode 100644 drivers/arm/mm_monitor/spe-decoder/Makefile create mode 100644 drivers/arm/mm_monitor/spe-decoder/arm-spe-decoder.c create mode 100644 drivers/arm/mm_monitor/spe-decoder/arm-spe-decoder.h create mode 100644 drivers/arm/mm_monitor/spe-decoder/arm-spe-pkt-decoder.c create mode 100644 drivers/arm/mm_monitor/spe-decoder/arm-spe-pkt-decoder.h create mode 100644 include/linux/mem_sampling.h create mode 100644 mm/mem_sampling.c -- 2.25.1

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[PATCH OLK-6.6 v4 00/66] Add FUSE Passthrough Support
by Yifan Qiao 19 May '25

19 May '25

Changes since v3: - Fix potential deadlock of callers of direct_splice_actor Changes since v2: - Add CONFIG_FUSE_PASSTHROUGH=y to openeuler_defconfig for x86_64 Changes since v1: - Add CONFIG_FUSE_PASSTHROUGH=y to openeuler_defconfig for arm64 Amir Goldstein (60): fs: rename __mnt_{want,drop}_write*() helpers fs: export mnt_{get,put}_write_access() to modules fuse: factor out helper fuse_truncate_update_attr() fuse: allocate ff->release_args only if release is needed fuse: break up fuse_open_common() fuse: prepare for failing open response fuse: introduce inode io modes fuse: allow parallel dio writes with FUSE_DIRECT_IO_ALLOW_MMAP ovl: use simpler function to convert iocb to rw flags ovl: propagate IOCB_APPEND flag on writes to realfile ovl: punt write aio completion to workqueue ovl: protect copying of realinode attributes to ovl inode fs: get mnt_writers count for an open backing file's real path fs: create helper file_user_path() for user displayed mapped file path fs: store real path instead of fake path in backing file f_path ovl: add helper ovl_file_modified() ovl: split ovl_want_write() into two helpers ovl: reorder ovl_want_write() after ovl_inode_lock() ovl: do not open/llseek lower file with upper sb_writers held ovl: do not encode lower fh with upper sb_writers held ovl: add permission hooks outside of do_splice_direct() splice: remove permission hook from do_splice_direct() splice: move permission hook out of splice_direct_to_actor() splice: move permission hook out of splice_file_to_pipe() splice: remove permission hook from iter_file_splice_write() remap_range: move permission hooks out of do_clone_file_range() remap_range: move file_start_write() to after permission hook btrfs: move file_start_write() to after permission hook coda: change locking order in coda_file_write_iter() fs: move file_start_write() into vfs_iter_write() fs: move permission hook out of do_iter_write() fs: move permission hook out of do_iter_read() fs: move kiocb_start_write() into vfs_iocb_iter_write() fs: create __sb_write_started() helper fs: create file_write_started() helper fs: create {sb,file}_write_not_started() helpers fs: prepare for stackable filesystems backing file helpers fs: factor out backing_file_{read,write}_iter() helpers fs: factor out backing_file_splice_{read,write}() helpers fs: factor out backing_file_mmap() helper fuse: factor out helper for FUSE_DEV_IOC_CLONE fuse: introduce FUSE_PASSTHROUGH capability fuse: implement ioctls to manage backing files fuse: prepare for opening file in passthrough mode fuse: implement open in passthrough mode fuse: implement read/write passthrough fuse: implement splice read/write passthrough fuse: implement passthrough for mmap fuse: fix wrong ff->iomode state changes from parallel dio write fuse: fix parallel dio write on file open in passthrough mode fuse: verify zero padding in fuse_backing_map fuse: respect FOPEN_KEEP_CACHE on opendir ovl: fix dentry reference leak after changes to underlying layers ovl: relax WARN_ON in ovl_verify_area() remap_range: merge do_clone_file_range() into vfs_clone_file_range() fs: pass offset and result to backing_file end_write() callback fuse: update inode size after extending passthrough write fs: fork splice_file_range() from do_splice_direct() fs: move file_start_write() into direct_splice_actor() fs: use do_splice_direct() for nfsd/ksmbd server-side-copy Bernd Schubert (3): fuse: create helper function if DIO write needs exclusive lock fuse: add fuse_dio_lock/unlock helper functions fuse: disable the combination of passthrough and writeback cache Ed Tsai (1): backing-file: convert to using fops->splice_write Vegard Nossum (1): fs: fix __sb_write_started() kerneldoc formatting yangyun (1): fuse: use exclusive lock when FUSE_I_CACHE_IO_MODE is set fs/fuse/fuse_i.h | 151 +++++++++-- fs/internal.h | 21 +- fs/overlayfs/overlayfs.h | 38 ++- include/linux/backing-file.h | 42 +++ include/linux/fs.h | 91 +++++-- include/linux/fsnotify.h | 3 +- include/linux/mount.h | 4 +- include/linux/splice.h | 13 +- include/uapi/linux/fuse.h | 23 +- arch/arc/kernel/troubleshoot.c | 6 +- drivers/block/loop.c | 2 - drivers/target/target_core_file.c | 10 +- fs/backing-file.c | 339 +++++++++++++++++++++++ fs/btrfs/ioctl.c | 12 +- fs/cachefiles/io.c | 5 +- fs/ceph/file.c | 9 +- fs/coda/file.c | 2 - fs/file_table.c | 12 +- fs/fuse/dev.c | 98 +++++-- fs/fuse/dir.c | 49 +++- fs/fuse/file.c | 362 +++++++++++++++++-------- fs/fuse/inode.c | 37 +++ fs/fuse/iomode.c | 276 +++++++++++++++++++ fs/fuse/passthrough.c | 355 ++++++++++++++++++++++++ fs/inode.c | 8 +- fs/namespace.c | 36 +-- fs/nfsd/vfs.c | 7 +- fs/open.c | 70 ++--- fs/overlayfs/copy_up.c | 166 ++++++++---- fs/overlayfs/dir.c | 60 ++-- fs/overlayfs/export.c | 7 +- fs/overlayfs/file.c | 230 ++++------------ fs/overlayfs/inode.c | 57 ++-- fs/overlayfs/namei.c | 37 ++- fs/overlayfs/super.c | 47 ++-- fs/overlayfs/util.c | 75 ++++- fs/proc/base.c | 2 +- fs/proc/nommu.c | 2 +- fs/proc/task_mmu.c | 4 +- fs/proc/task_nommu.c | 2 +- fs/read_write.c | 199 ++++++++------ fs/remap_range.c | 44 ++- fs/splice.c | 168 ++++++++---- fs/super.c | 1 + kernel/acct.c | 4 +- kernel/trace/trace_output.c | 2 +- MAINTAINERS | 9 + arch/arm64/configs/openeuler_defconfig | 1 + arch/x86/configs/openeuler_defconfig | 1 + fs/Kconfig | 4 + fs/Makefile | 1 + fs/fuse/Kconfig | 11 + fs/fuse/Makefile | 2 + fs/overlayfs/Kconfig | 1 + 54 files changed, 2394 insertions(+), 824 deletions(-) create mode 100644 include/linux/backing-file.h create mode 100644 fs/backing-file.c create mode 100644 fs/fuse/iomode.c create mode 100644 fs/fuse/passthrough.c -- 2.39.2

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[PATCH OLK-6.6 v3 00/19] Memory access profiler(SPE) driven NUMA balancing and damon
by Ze Zuo 18 May '25

18 May '25

Hi, In Arm processors, there is a hardware PMU (Performance Monitoring Unit) facility called Statistical Profiling Extension (SPE) that can gather memory access metrics. In this patchset, SPE is exploited as an access information sampling approach to drive NUMA balancing. This sampling approach is introducedto replace the method based on address space scanning and hint faults with the access information provided by the hardware. With this, it is no longer necessary for NUMA balancing to scan over the address space periodically and rely on task-to-page association built by NUMA hint faults. Instead, the access samples obtained from hardware PMU are fed to NUMA balancing as equivalents to page fault. Except for the replaced sampling approach, the rest of the NUMA balancing policy is retained to do pages and tasks migrations according to the samples. Profiling based on SPE is an valid alternative sampling approach in NUMA balancing for the optimal page and task placement. This can be also extended to other architectures as long as there is a hardware PMU that supports memory access profiling. An abstract layer mem_sampling is introduced to reserve support for other kernel features and different types of hardware PMU. To help evaluate performance of this approach in system, syctl interfaces are added to enable/disable hardware mem sampling. NUMA balancing sampling approach can be also switched back to hint-faults- based approach dynamically. TODOs Currently, SPE for NUMA balance does not support PMD-level page migration, but it will be supported in later version. changes since v4: -- patch 4 rename helper function. -- patch to series patch. Ze Zuo (19): mm_monitor/mm_spe: Introduce standalone SPE profiling framework mm_monitor/mm_spe: Init per-CPU buffers and SPE state mm_monitor/mm_spe: Add PMU based memory sampling abstract layer mm_monitor/mm_spe: Introduce arm_spe_user to abstract SPE usage mm/mem_sampling: Add eBPF interface for memory access tracing mm/mem_sampling: Add sched switch hook to control sampling state sched: Enable per-process mem_sampling from sched switch path mm/mem_sampling:: Add proc and cmdline interface to control sampling enable mm/numa: Use mem_sampling framework for NUMA balancing mm/numa: Enable mem_sampling-based access tracking for NUMA balancing mm/mem_sampling: Add sysctl control for NUMA balancing integration mm/numa: Add tracepoints for access sampling and NUMA page migration mm/damon/vaddr: Support hardware-assisted memory access sampling mm/damon/vaddr: Extend mem_sampling sysctl to support DAMON mm/damon/vaddr: Add demotion interface for migrating cold pages to target nodemask arm-spe: Boost SPE add TLB hot page and remote access tracking arm-spe: Add kernel cmdline option to enable SPE boost arm-spe: Export boost SPE sampling info via tracefs tracepoint config: Enable memory sampling based pmu for numa balance and damon by default arch/arm64/configs/openeuler_defconfig | 4 + drivers/Kconfig | 2 + drivers/Makefile | 2 + drivers/arm/Kconfig | 2 + drivers/arm/mm_monitor/Kconfig | 20 + drivers/arm/mm_monitor/Makefile | 2 + drivers/arm/mm_monitor/mm_spe.c | 537 +++++++++++++++ drivers/arm/mm_monitor/mm_spe.h | 102 +++ drivers/arm/mm_monitor/spe-decoder/Makefile | 2 + .../mm_monitor/spe-decoder/arm-spe-decoder.c | 224 +++++++ .../mm_monitor/spe-decoder/arm-spe-decoder.h | 75 +++ .../spe-decoder/arm-spe-pkt-decoder.c | 227 +++++++ .../spe-decoder/arm-spe-pkt-decoder.h | 158 +++++ drivers/perf/arm_pmu_acpi.c | 31 + drivers/perf/arm_spe_pmu.c | 112 +++- include/linux/damon.h | 8 + include/linux/mem_sampling.h | 133 ++++ include/linux/mempolicy.h | 2 + include/linux/migrate_mode.h | 1 + include/linux/mm_types.h | 4 + include/trace/events/kmem.h | 112 ++++ include/trace/events/migrate.h | 3 +- kernel/fork.c | 3 + kernel/sched/core.c | 2 + kernel/sched/fair.c | 13 + mm/Kconfig | 28 + mm/Makefile | 1 + mm/damon/Kconfig | 14 + mm/damon/core.c | 34 + mm/damon/sysfs-schemes.c | 40 ++ mm/damon/vaddr.c | 127 ++++ mm/mem_sampling.c | 614 ++++++++++++++++++ mm/mempolicy.c | 146 +++++ 33 files changed, 2783 insertions(+), 2 deletions(-) create mode 100644 drivers/arm/Kconfig create mode 100644 drivers/arm/mm_monitor/Kconfig create mode 100644 drivers/arm/mm_monitor/Makefile create mode 100644 drivers/arm/mm_monitor/mm_spe.c create mode 100644 drivers/arm/mm_monitor/mm_spe.h create mode 100644 drivers/arm/mm_monitor/spe-decoder/Makefile create mode 100644 drivers/arm/mm_monitor/spe-decoder/arm-spe-decoder.c create mode 100644 drivers/arm/mm_monitor/spe-decoder/arm-spe-decoder.h create mode 100644 drivers/arm/mm_monitor/spe-decoder/arm-spe-pkt-decoder.c create mode 100644 drivers/arm/mm_monitor/spe-decoder/arm-spe-pkt-decoder.h create mode 100644 include/linux/mem_sampling.h create mode 100644 mm/mem_sampling.c -- 2.25.1

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[PATCH OLK-6.6 v2] Memory access profiler(SPE) driven NUMA balancing and damon
by Ze Zuo 18 May '25

18 May '25

Hi, In Arm processors, there is a hardware PMU (Performance Monitoring Unit) facility called Statistical Profiling Extension (SPE) that can gather memory access metrics. In this patchset, SPE is exploited as an access information sampling approach to drive NUMA balancing. This sampling approach is introducedto replace the method based on address space scanning and hint faults with the access information provided by the hardware. With this, it is no longer necessary for NUMA balancing to scan over the address space periodically and rely on task-to-page association built by NUMA hint faults. Instead, the access samples obtained from hardware PMU are fed to NUMA balancing as equivalents to page fault. Except for the replaced sampling approach, the rest of the NUMA balancing policy is retained to do pages and tasks migrations according to the samples. Profiling based on SPE is an valid alternative sampling approach in NUMA balancing for the optimal page and task placement. This can be also extended to other architectures as long as there is a hardware PMU that supports memory access profiling. An abstract layer mem_sampling is introduced to reserve support for other kernel features and different types of hardware PMU. To help evaluate performance of this approach in system, syctl interfaces are added to enable/disable hardware mem sampling. NUMA balancing sampling approach can be also switched back to hint-faults- based approach dynamically. TODOs Currently, SPE for NUMA balance does not support PMD-level page migration, but it will be supported in later version. changes since v4: -- patch 4 introduce helper function. -- fix commit issue. Ze Zuo (19): mm_monitor/mm_spe: Introduce standalone SPE profiling framework mm_monitor/mm_spe: Init per-CPU buffers and SPE state mm_monitor/mm_spe: Add PMU based memory sampling abstract layer mm_monitor/mm_spe: Introduce arm_spe_user to abstract SPE usage mm/mem_sampling: Add eBPF interface for memory access tracing mm/mem_sampling: Add sched switch hook to control sampling state sched: Enable per-process mem_sampling from sched switch path mm/mem_sampling:: Add proc and cmdline interface to control sampling enable mm/numa: Use mem_sampling framework for NUMA balancing mm/numa: Enable mem_sampling-based access tracking for NUMA balancing mm/mem_sampling: Add sysctl control for NUMA balancing integration mm/numa: Add tracepoints for access sampling and NUMA page migration mm/damon/vaddr: Support hardware-assisted memory access sampling mm/damon/vaddr: Extend mem_sampling sysctl to support DAMON mm/damon/vaddr: Add demotion interface for migrating cold pages to target nodemask arm-spe: Boost SPE add TLB hot page and remote access tracking arm-spe: Add kernel cmdline option to enable SPE boost arm-spe: Export boost SPE sampling info via tracefs tracepoint config: Enable memory sampling based pmu for numa balance and damon by default arch/arm64/configs/openeuler_defconfig | 4 + drivers/Kconfig | 2 + drivers/Makefile | 2 + drivers/arm/Kconfig | 2 + drivers/arm/mm_monitor/Kconfig | 20 + drivers/arm/mm_monitor/Makefile | 2 + drivers/arm/mm_monitor/mm_spe.c | 537 +++++++++++++++ drivers/arm/mm_monitor/mm_spe.h | 102 +++ drivers/arm/mm_monitor/spe-decoder/Makefile | 2 + .../mm_monitor/spe-decoder/arm-spe-decoder.c | 224 +++++++ .../mm_monitor/spe-decoder/arm-spe-decoder.h | 75 +++ .../spe-decoder/arm-spe-pkt-decoder.c | 227 +++++++ .../spe-decoder/arm-spe-pkt-decoder.h | 158 +++++ drivers/perf/arm_pmu_acpi.c | 31 + drivers/perf/arm_spe_pmu.c | 112 +++- include/linux/damon.h | 8 + include/linux/mem_sampling.h | 133 ++++ include/linux/mempolicy.h | 2 + include/linux/migrate_mode.h | 1 + include/linux/mm_types.h | 4 + include/trace/events/kmem.h | 112 ++++ include/trace/events/migrate.h | 3 +- kernel/fork.c | 3 + kernel/sched/core.c | 2 + kernel/sched/fair.c | 13 + mm/Kconfig | 28 + mm/Makefile | 1 + mm/damon/Kconfig | 14 + mm/damon/core.c | 34 + mm/damon/sysfs-schemes.c | 40 ++ mm/damon/vaddr.c | 127 ++++ mm/mem_sampling.c | 614 ++++++++++++++++++ mm/mempolicy.c | 146 +++++ 33 files changed, 2783 insertions(+), 2 deletions(-) create mode 100644 drivers/arm/Kconfig create mode 100644 drivers/arm/mm_monitor/Kconfig create mode 100644 drivers/arm/mm_monitor/Makefile create mode 100644 drivers/arm/mm_monitor/mm_spe.c create mode 100644 drivers/arm/mm_monitor/mm_spe.h create mode 100644 drivers/arm/mm_monitor/spe-decoder/Makefile create mode 100644 drivers/arm/mm_monitor/spe-decoder/arm-spe-decoder.c create mode 100644 drivers/arm/mm_monitor/spe-decoder/arm-spe-decoder.h create mode 100644 drivers/arm/mm_monitor/spe-decoder/arm-spe-pkt-decoder.c create mode 100644 drivers/arm/mm_monitor/spe-decoder/arm-spe-pkt-decoder.h create mode 100644 include/linux/mem_sampling.h create mode 100644 mm/mem_sampling.c -- 2.25.1

2 38

[PATCH OLK-6.6 00/19] Memory access profiler(SPE) driven NUMA balancing and damon
by Ze Zuo 18 May '25

18 May '25

Hi, In Arm processors, there is a hardware PMU (Performance Monitoring Unit) facility called Statistical Profiling Extension (SPE) that can gather memory access metrics. In this patchset, SPE is exploited as an access information sampling approach to drive NUMA balancing. This sampling approach is introducedto replace the method based on address space scanning and hint faults with the access information provided by the hardware. With this, it is no longer necessary for NUMA balancing to scan over the address space periodically and rely on task-to-page association built by NUMA hint faults. Instead, the access samples obtained from hardware PMU are fed to NUMA balancing as equivalents to page fault. Except for the replaced sampling approach, the rest of the NUMA balancing policy is retained to do pages and tasks migrations according to the samples. Profiling based on SPE is an valid alternative sampling approach in NUMA balancing for the optimal page and task placement. This can be also extended to other architectures as long as there is a hardware PMU that supports memory access profiling. An abstract layer mem_sampling is introduced to reserve support for other kernel features and different types of hardware PMU. To help evaluate performance of this approach in system, syctl interfaces are added to enable/disable hardware mem sampling. NUMA balancing sampling approach can be also switched back to hint-faults- based approach dynamically. TODOs Currently, SPE for NUMA balance does not support PMD-level page migration, but it will be supported in later version. Ze Zuo (19): mm_monitor/mm_spe: Introduce standalone SPE profiling framework mm_monitor/mm_spe: Init per-CPU buffers and SPE state mm_monitor/mm_spe: Add PMU based memory sampling abstract layer mm_monitor/mm_spe: Introduce arm_spe_user to abstract SPE usage mm/mem_sampling: Add eBPF interface for memory access tracing mm/mem_sampling: Add sched switch hook to control sampling state sched: Enable per-process mem_sampling from sched switch path mm/mem_sampling:: Add proc and cmdline interface to control sampling enable mm/numa: Use mem_sampling framework for NUMA balancing mm/numa: Enable mem_sampling-based access tracking for NUMA balancing mm/mem_sampling: Add sysctl control for NUMA balancing integration mm/numa: Add tracepoints for access sampling and NUMA page migration mm/damon/vaddr: Support hardware-assisted memory access sampling mm/damon/vaddr: Extend mem_sampling sysctl to support DAMON mm/damon/vaddr: Add demotion interface for migrating cold pages to target nodemask arm-spe: Boost SPE add TLB hot page and remote access tracking arm-spe: Add kernel cmdline option to enable SPE boost arm-spe: Export boost SPE sampling info via tracefs tracepoint config: Enable memory sampling based pmu for numa balance and damon by default arch/arm64/configs/openeuler_defconfig | 4 + drivers/Kconfig | 2 + drivers/Makefile | 2 + drivers/arm/Kconfig | 2 + drivers/arm/mm_monitor/Kconfig | 20 + drivers/arm/mm_monitor/Makefile | 2 + drivers/arm/mm_monitor/mm_spe.c | 537 +++++++++++++++ drivers/arm/mm_monitor/mm_spe.h | 102 +++ drivers/arm/mm_monitor/spe-decoder/Makefile | 2 + .../mm_monitor/spe-decoder/arm-spe-decoder.c | 224 +++++++ .../mm_monitor/spe-decoder/arm-spe-decoder.h | 75 +++ .../spe-decoder/arm-spe-pkt-decoder.c | 227 +++++++ .../spe-decoder/arm-spe-pkt-decoder.h | 158 +++++ drivers/perf/arm_pmu_acpi.c | 31 + drivers/perf/arm_spe_pmu.c | 112 +++- include/linux/damon.h | 8 + include/linux/mem_sampling.h | 125 ++++ include/linux/mempolicy.h | 2 + include/linux/migrate_mode.h | 1 + include/linux/mm_types.h | 4 + include/trace/events/kmem.h | 112 ++++ include/trace/events/migrate.h | 3 +- kernel/fork.c | 3 + kernel/sched/core.c | 2 + kernel/sched/fair.c | 13 + mm/Kconfig | 28 + mm/Makefile | 1 + mm/damon/Kconfig | 14 + mm/damon/core.c | 34 + mm/damon/sysfs-schemes.c | 40 ++ mm/damon/vaddr.c | 127 ++++ mm/mem_sampling.c | 614 ++++++++++++++++++ mm/mempolicy.c | 146 +++++ 33 files changed, 2775 insertions(+), 2 deletions(-) create mode 100644 drivers/arm/Kconfig create mode 100644 drivers/arm/mm_monitor/Kconfig create mode 100644 drivers/arm/mm_monitor/Makefile create mode 100644 drivers/arm/mm_monitor/mm_spe.c create mode 100644 drivers/arm/mm_monitor/mm_spe.h create mode 100644 drivers/arm/mm_monitor/spe-decoder/Makefile create mode 100644 drivers/arm/mm_monitor/spe-decoder/arm-spe-decoder.c create mode 100644 drivers/arm/mm_monitor/spe-decoder/arm-spe-decoder.h create mode 100644 drivers/arm/mm_monitor/spe-decoder/arm-spe-pkt-decoder.c create mode 100644 drivers/arm/mm_monitor/spe-decoder/arm-spe-pkt-decoder.h create mode 100644 include/linux/mem_sampling.h create mode 100644 mm/mem_sampling.c -- 2.25.1

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[openeuler:openEuler-1.0-LTS 1640/1640] kismet: WARNING: unmet direct dependencies detected for UACCE when selected by CRYPTO_DEV_HISI_QM
by kernel test robot 18 May '25

18 May '25

tree: https://gitee.com/openeuler/kernel.git openEuler-1.0-LTS head: 9f24885126c03082a677c4d607a2e3502781c858 commit: c89f49b5f6b23b319f338f7e9e7e9b077ec8f5ff [1640/1640] crypto: hisilicon delete invlaid api and config config: arm64-kismet-CONFIG_UACCE-CONFIG_CRYPTO_DEV_HISI_QM-0-0 (https://download.01.org/0day-ci/archive/20250518/202505180330.wT5fsdK9-lkp@…) reproduce: (https://download.01.org/0day-ci/archive/20250518/202505180330.wT5fsdK9-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/202505180330.wT5fsdK9-lkp@intel.com/ kismet warnings: (new ones prefixed by >>) >> kismet: WARNING: unmet direct dependencies detected for UACCE when selected by CRYPTO_DEV_HISI_QM WARNING: unmet direct dependencies detected for PINCTRL_EXYNOS Depends on [n]: PINCTRL [=y] && OF [=y] && GPIOLIB [=n] && (ARCH_EXYNOS [=y] || ARCH_S5PV210) Selected by [y]: - ARCH_EXYNOS [=y] WARNING: unmet direct dependencies detected for UACCE Depends on [n]: IOMMU_API [=n] Selected by [y]: - CRYPTO_DEV_HISI_QM [=y] && CRYPTO [=y] && CRYPTO_HW [=y] && ARM64 [=y] && PCI [=y] -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki

1 0

[PATCH openEuler-1.0-LTS] dm crypt: add cond_resched() to dmcrypt_write()
by Zheng Qixing 17 May '25

17 May '25

From: Mikulas Patocka <mpatocka(a)redhat.com> stable inclusion from stable-v4.19.280 commit 7b9f8efb5fc888dd938d2964e705b8e00f1dc0f6 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/IC5DGE CVE: CVE-2023-53051 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id… ------------------ commit fb294b1c0ba982144ca467a75e7d01ff26304e2b upstream. The loop in dmcrypt_write may be running for unbounded amount of time, thus we need cond_resched() in it. This commit fixes the following warning: [ 3391.153255][ C12] watchdog: BUG: soft lockup - CPU#12 stuck for 23s! [dmcrypt_write/2:2897] ... [ 3391.387210][ C12] Call trace: [ 3391.390338][ C12] blk_attempt_bio_merge.part.6+0x38/0x158 [ 3391.395970][ C12] blk_attempt_plug_merge+0xc0/0x1b0 [ 3391.401085][ C12] blk_mq_submit_bio+0x398/0x550 [ 3391.405856][ C12] submit_bio_noacct+0x308/0x380 [ 3391.410630][ C12] dmcrypt_write+0x1e4/0x208 [dm_crypt] [ 3391.416005][ C12] kthread+0x130/0x138 [ 3391.419911][ C12] ret_from_fork+0x10/0x18 Reported-by: yangerkun <yangerkun(a)huawei.com> Fixes: dc2676210c42 ("dm crypt: offload writes to thread") Cc: stable(a)vger.kernel.org Signed-off-by: Mikulas Patocka <mpatocka(a)redhat.com> Signed-off-by: Mike Snitzer <snitzer(a)kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> Signed-off-by: Zheng Qixing <zhengqixing(a)huawei.com> --- drivers/md/dm-crypt.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c index fee23d3e2eba..be1ec17a0a4e 100644 --- a/drivers/md/dm-crypt.c +++ b/drivers/md/dm-crypt.c @@ -1661,6 +1661,7 @@ static int dmcrypt_write(void *data) io = crypt_io_from_node(rb_first(&write_tree)); rb_erase(&io->rb_node, &write_tree); kcryptd_io_write(io); + cond_resched(); } while (!RB_EMPTY_ROOT(&write_tree)); blk_finish_plug(&plug); } -- 2.39.2

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[PATCH OLK-6.6 v3 00/11] IPIV-BUGFIX for HIP12
by Jinqian Yang 17 May '25

17 May '25

Compared with the previous IPIV, the IPIV-BUGFIX has the following changes: 1. Use Kconfig to Control whether to enable IPIV. 2. Users use ioctl to control whether to enable IPIV. 3. Use the SMCCC interface for Guest OS to control whether to enable IPIV. 4. ensure that enable_ipiv_from_guest are the same before and after live migration 5. make sure vcpu_id == vcpu_idx. 6. the MPIDR cannot be changed When IPIV is enabled. 7. fix bug that ipiv enable is displayed on the host when "kvm-arm.vgic_v4_enable=0 kvm-arm.ipiv_enabled=1" is configured. 8. Add Exception Printing Jinqian Yang (5): arm64/config: add config to control whether enable IPIV feature KVM: arm64: fix live migration bug of IPIv KVM: arm64: using kvm_vgic_global_state for ipiv kvm: hisi: print error for IPIV arm64/kabi: use KABI_EXTEND to skip KABI check Zhou Wang (6): KVM: arm64: Introduce ipiv enable ioctl KVM: arm64: Document PV-sgi interface KVM: arm64: Implement PV_SGI related calls irqchip/gic: Add HiSilicon PV SGI support kvm: hisi: make sure vcpu_id and vcpu_idx have same value in IPIv kvm: hisi: Don't allow to change mpidr in IPIv Documentation/virt/kvm/arm/hypercalls.rst | 4 ++ Documentation/virt/kvm/arm/pvsgi.rst | 33 ++++++++++++++ arch/arm64/Kconfig | 13 ++++++ arch/arm64/configs/openeuler_defconfig | 1 + arch/arm64/include/asm/kvm_host.h | 3 ++ arch/arm64/include/uapi/asm/kvm.h | 5 +++ arch/arm64/kvm/arm.c | 36 +++++++++++---- arch/arm64/kvm/hisilicon/hisi_virt.c | 32 ++++++++++++- arch/arm64/kvm/hisilicon/hisi_virt.h | 20 +++++++-- arch/arm64/kvm/hypercalls.c | 26 +++++++++++ arch/arm64/kvm/sys_regs.c | 34 +++++++++----- arch/arm64/kvm/vgic/vgic-init.c | 42 ++++++++++++++--- arch/arm64/kvm/vgic/vgic-its.c | 19 ++++++++ arch/arm64/kvm/vgic/vgic-mmio-v3.c | 1 - drivers/irqchip/irq-gic-v3-its.c | 50 ++++++++++++++------- drivers/irqchip/irq-gic-v3.c | 55 ++++++++++++++++++----- include/linux/arm-smccc.h | 15 +++++++ include/linux/irqchip/arm-gic-v3.h | 10 +++++ include/linux/irqchip/arm-gic-v4.h | 5 ++- include/uapi/linux/kvm.h | 2 +- 20 files changed, 348 insertions(+), 58 deletions(-) create mode 100644 Documentation/virt/kvm/arm/pvsgi.rst -- 2.33.0

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[PATCH OLK-6.6 v3 00/11] IPIV-BUGFIX for HIP12
by Jinqian Yang 17 May '25

17 May '25

Compared with the previous IPIV, the IPIV-BUGFIX has the following changes: 1. Use Kconfig to Control whether to enable IPIV. 2. Users use ioctl to control whether to enable IPIV. 3. Use the SMCCC interface for Guest OS to control whether to enable IPIV. 4. ensure that enable_ipiv_from_guest are the same before and after live migration 5. make sure vcpu_id == vcpu_idx. 6. the MPIDR cannot be changed When IPIV is enabled. 7. fix bug that ipiv enable is displayed on the host when "kvm-arm.vgic_v4_enable=0 kvm-arm.ipiv_enabled=1" is configured. 8. Add Exception Printing Jinqian Yang (5): arm64/config: add config to control whether enable IPIV feature KVM: arm64: fix live migration bug of IPIv KVM: arm64: using kvm_vgic_global_state for ipiv kvm: hisi: print error for IPIV arm64/kabi: use KABI_EXTEND to skip KABI check Zhou Wang (6): KVM: arm64: Introduce ipiv enable ioctl KVM: arm64: Document PV-sgi interface KVM: arm64: Implement PV_SGI related calls irqchip/gic: Add HiSilicon PV SGI support kvm: hisi: make sure vcpu_id and vcpu_idx have same value in IPIv kvm: hisi: Don't allow to change mpidr in IPIv Documentation/virt/kvm/arm/hypercalls.rst | 4 ++ Documentation/virt/kvm/arm/pvsgi.rst | 33 ++++++++++++++ arch/arm64/Kconfig | 13 ++++++ arch/arm64/configs/openeuler_defconfig | 1 + arch/arm64/include/asm/kvm_host.h | 3 ++ arch/arm64/include/uapi/asm/kvm.h | 5 +++ arch/arm64/kvm/arm.c | 36 +++++++++++---- arch/arm64/kvm/hisilicon/hisi_virt.c | 32 ++++++++++++- arch/arm64/kvm/hisilicon/hisi_virt.h | 20 +++++++-- arch/arm64/kvm/hypercalls.c | 26 +++++++++++ arch/arm64/kvm/sys_regs.c | 34 +++++++++----- arch/arm64/kvm/vgic/vgic-init.c | 42 ++++++++++++++--- arch/arm64/kvm/vgic/vgic-its.c | 19 ++++++++ arch/arm64/kvm/vgic/vgic-mmio-v3.c | 1 - drivers/irqchip/irq-gic-v3-its.c | 50 ++++++++++++++------- drivers/irqchip/irq-gic-v3.c | 55 ++++++++++++++++++----- include/linux/arm-smccc.h | 15 +++++++ include/linux/irqchip/arm-gic-v3.h | 10 +++++ include/linux/irqchip/arm-gic-v4.h | 5 ++- include/uapi/linux/kvm.h | 2 +- 20 files changed, 348 insertions(+), 58 deletions(-) create mode 100644 Documentation/virt/kvm/arm/pvsgi.rst -- 2.33.0

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[PATCH OLK-6.6] drm/amd/display: prevent hang on link training fail
by Jinjie Ruan 17 May '25

17 May '25

From: Brendan Tam <Brendan.Tam(a)amd.com> stable inclusion from stable-v6.12.25 commit 0363c03672cd3191f037905bf981eb523a3b71b1 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/IC6LSF CVE: CVE-2025-37870 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id… -------------------------------- commit 8058061ed9d6bc259d1e678607b07d259342c08f upstream. [Why] When link training fails, the phy clock will be disabled. However, in enable_streams, it is assumed that link training succeeded and the mux selects the phy clock, causing a hang when a register write is made. [How] When enable_stream is hit, check if link training failed. If it did, fall back to the ref clock to avoid a hang and keep the system in a recoverable state. Reviewed-by: Dillon Varone <dillon.varone(a)amd.com> Signed-off-by: Brendan Tam <Brendan.Tam(a)amd.com> Signed-off-by: Aurabindo Pillai <aurabindo.pillai(a)amd.com> Tested-by: Daniel Wheeler <daniel.wheeler(a)amd.com> Signed-off-by: Alex Deucher <alexander.deucher(a)amd.com> Cc: stable(a)vger.kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> Conflicts: drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c drivers/gpu/drm/amd/display/dc/hwss/dcn20/dcn20_hwseq.c drivers/gpu/drm/amd/display/dc/hwss/dcn401/dcn401_hwseq.c [The bug in dcn401_hwseq.c is not introduced and the dcn20_hwseq.c has changed the file path.] Signed-off-by: Jinjie Ruan <ruanjinjie(a)huawei.com> --- drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c index 509e0fd52491..8682c01b922a 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c +++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c @@ -2749,7 +2749,11 @@ void dcn20_enable_stream(struct pipe_ctx *pipe_ctx) dccg->funcs->set_dpstreamclk(dccg, DTBCLK0, tg->inst, dp_hpo_inst); phyd32clk = get_phyd32clk_src(link); - dccg->funcs->enable_symclk32_se(dccg, dp_hpo_inst, phyd32clk); + if (link->cur_link_settings.link_rate == LINK_RATE_UNKNOWN) { + dccg->funcs->disable_symclk32_se(dccg, dp_hpo_inst); + } else { + dccg->funcs->enable_symclk32_se(dccg, dp_hpo_inst, phyd32clk); + } } else { } if (hws->funcs.calculate_dccg_k1_k2_values && dc->res_pool->dccg->funcs->set_pixel_rate_div) { -- 2.34.1

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