9c5968db9e
indivudual patches which are described in their changelogs. - "Allocate and free frozen pages" from Matthew Wilcox reorganizes the page allocator so we end up with the ability to allocate and free zero-refcount pages. So that callers (ie, slab) can avoid a refcount inc & dec. - "Support large folios for tmpfs" from Baolin Wang teaches tmpfs to use large folios other than PMD-sized ones. - "Fix mm/rodata_test" from Petr Tesarik performs some maintenance and fixes for this small built-in kernel selftest. - "mas_anode_descend() related cleanup" from Wei Yang tidies up part of the mapletree code. - "mm: fix format issues and param types" from Keren Sun implements a few minor code cleanups. - "simplify split calculation" from Wei Yang provides a few fixes and a test for the mapletree code. - "mm/vma: make more mmap logic userland testable" from Lorenzo Stoakes continues the work of moving vma-related code into the (relatively) new mm/vma.c. - "mm/page_alloc: gfp flags cleanups for alloc_contig_*()" from David Hildenbrand cleans up and rationalizes handling of gfp flags in the page allocator. - "readahead: Reintroduce fix for improper RA window sizing" from Jan Kara is a second attempt at fixing a readahead window sizing issue. It should reduce the amount of unnecessary reading. - "synchronously scan and reclaim empty user PTE pages" from Qi Zheng addresses an issue where "huge" amounts of pte pagetables are accumulated (https://lore.kernel.org/lkml/cover.1718267194.git.zhengqi.arch@bytedance.com/). Qi's series addresses this windup by synchronously freeing PTE memory within the context of madvise(MADV_DONTNEED). - "selftest/mm: Remove warnings found by adding compiler flags" from Muhammad Usama Anjum fixes some build warnings in the selftests code when optional compiler warnings are enabled. - "mm: don't use __GFP_HARDWALL when migrating remote pages" from David Hildenbrand tightens the allocator's observance of __GFP_HARDWALL. - "pkeys kselftests improvements" from Kevin Brodsky implements various fixes and cleanups in the MM selftests code, mainly pertaining to the pkeys tests. - "mm/damon: add sample modules" from SeongJae Park enhances DAMON to estimate application working set size. - "memcg/hugetlb: Rework memcg hugetlb charging" from Joshua Hahn provides some cleanups to memcg's hugetlb charging logic. - "mm/swap_cgroup: remove global swap cgroup lock" from Kairui Song removes the global swap cgroup lock. A speedup of 10% for a tmpfs-based kernel build was demonstrated. - "zram: split page type read/write handling" from Sergey Senozhatsky has several fixes and cleaups for zram in the area of zram_write_page(). A watchdog softlockup warning was eliminated. - "move pagetable_*_dtor() to __tlb_remove_table()" from Kevin Brodsky cleans up the pagetable destructor implementations. A rare use-after-free race is fixed. - "mm/debug: introduce and use VM_WARN_ON_VMG()" from Lorenzo Stoakes simplifies and cleans up the debugging code in the VMA merging logic. - "Account page tables at all levels" from Kevin Brodsky cleans up and regularizes the pagetable ctor/dtor handling. This results in improvements in accounting accuracy. - "mm/damon: replace most damon_callback usages in sysfs with new core functions" from SeongJae Park cleans up and generalizes DAMON's sysfs file interface logic. - "mm/damon: enable page level properties based monitoring" from SeongJae Park increases the amount of information which is presented in response to DAMOS actions. - "mm/damon: remove DAMON debugfs interface" from SeongJae Park removes DAMON's long-deprecated debugfs interfaces. Thus the migration to sysfs is completed. - "mm/hugetlb: Refactor hugetlb allocation resv accounting" from Peter Xu cleans up and generalizes the hugetlb reservation accounting. - "mm: alloc_pages_bulk: small API refactor" from Luiz Capitulino removes a never-used feature of the alloc_pages_bulk() interface. - "mm/damon: extend DAMOS filters for inclusion" from SeongJae Park extends DAMOS filters to support not only exclusion (rejecting), but also inclusion (allowing) behavior. - "Add zpdesc memory descriptor for zswap.zpool" from Alex Shi "introduces a new memory descriptor for zswap.zpool that currently overlaps with struct page for now. This is part of the effort to reduce the size of struct page and to enable dynamic allocation of memory descriptors." - "mm, swap: rework of swap allocator locks" from Kairui Song redoes and simplifies the swap allocator locking. A speedup of 400% was demonstrated for one workload. As was a 35% reduction for kernel build time with swap-on-zram. - "mm: update mips to use do_mmap(), make mmap_region() internal" from Lorenzo Stoakes reworks MIPS's use of mmap_region() so that mmap_region() can be made MM-internal. - "mm/mglru: performance optimizations" from Yu Zhao fixes a few MGLRU regressions and otherwise improves MGLRU performance. - "Docs/mm/damon: add tuning guide and misc updates" from SeongJae Park updates DAMON documentation. - "Cleanup for memfd_create()" from Isaac Manjarres does that thing. - "mm: hugetlb+THP folio and migration cleanups" from David Hildenbrand provides various cleanups in the areas of hugetlb folios, THP folios and migration. - "Uncached buffered IO" from Jens Axboe implements the new RWF_DONTCACHE flag which provides synchronous dropbehind for pagecache reading and writing. To permite userspace to address issues with massive buildup of useless pagecache when reading/writing fast devices. - "selftests/mm: virtual_address_range: Reduce memory" from Thomas Weißschuh fixes and optimizes some of the MM selftests. -----BEGIN PGP SIGNATURE----- iHUEABYKAB0WIQTTMBEPP41GrTpTJgfdBJ7gKXxAjgUCZ5a+cwAKCRDdBJ7gKXxA jtoyAP9R58oaOKPJuTizEKKXvh/RpMyD6sYcz/uPpnf+cKTZxQEAqfVznfWlw/Lz uC3KRZYhmd5YrxU4o+qjbzp9XWX/xAE= =Ib2s -----END PGP SIGNATURE----- Merge tag 'mm-stable-2025-01-26-14-59' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Pull MM updates from Andrew Morton: "The various patchsets are summarized below. Plus of course many indivudual patches which are described in their changelogs. - "Allocate and free frozen pages" from Matthew Wilcox reorganizes the page allocator so we end up with the ability to allocate and free zero-refcount pages. So that callers (ie, slab) can avoid a refcount inc & dec - "Support large folios for tmpfs" from Baolin Wang teaches tmpfs to use large folios other than PMD-sized ones - "Fix mm/rodata_test" from Petr Tesarik performs some maintenance and fixes for this small built-in kernel selftest - "mas_anode_descend() related cleanup" from Wei Yang tidies up part of the mapletree code - "mm: fix format issues and param types" from Keren Sun implements a few minor code cleanups - "simplify split calculation" from Wei Yang provides a few fixes and a test for the mapletree code - "mm/vma: make more mmap logic userland testable" from Lorenzo Stoakes continues the work of moving vma-related code into the (relatively) new mm/vma.c - "mm/page_alloc: gfp flags cleanups for alloc_contig_*()" from David Hildenbrand cleans up and rationalizes handling of gfp flags in the page allocator - "readahead: Reintroduce fix for improper RA window sizing" from Jan Kara is a second attempt at fixing a readahead window sizing issue. It should reduce the amount of unnecessary reading - "synchronously scan and reclaim empty user PTE pages" from Qi Zheng addresses an issue where "huge" amounts of pte pagetables are accumulated: https://lore.kernel.org/lkml/cover.1718267194.git.zhengqi.arch@bytedance.com/ Qi's series addresses this windup by synchronously freeing PTE memory within the context of madvise(MADV_DONTNEED) - "selftest/mm: Remove warnings found by adding compiler flags" from Muhammad Usama Anjum fixes some build warnings in the selftests code when optional compiler warnings are enabled - "mm: don't use __GFP_HARDWALL when migrating remote pages" from David Hildenbrand tightens the allocator's observance of __GFP_HARDWALL - "pkeys kselftests improvements" from Kevin Brodsky implements various fixes and cleanups in the MM selftests code, mainly pertaining to the pkeys tests - "mm/damon: add sample modules" from SeongJae Park enhances DAMON to estimate application working set size - "memcg/hugetlb: Rework memcg hugetlb charging" from Joshua Hahn provides some cleanups to memcg's hugetlb charging logic - "mm/swap_cgroup: remove global swap cgroup lock" from Kairui Song removes the global swap cgroup lock. A speedup of 10% for a tmpfs-based kernel build was demonstrated - "zram: split page type read/write handling" from Sergey Senozhatsky has several fixes and cleaups for zram in the area of zram_write_page(). A watchdog softlockup warning was eliminated - "move pagetable_*_dtor() to __tlb_remove_table()" from Kevin Brodsky cleans up the pagetable destructor implementations. A rare use-after-free race is fixed - "mm/debug: introduce and use VM_WARN_ON_VMG()" from Lorenzo Stoakes simplifies and cleans up the debugging code in the VMA merging logic - "Account page tables at all levels" from Kevin Brodsky cleans up and regularizes the pagetable ctor/dtor handling. This results in improvements in accounting accuracy - "mm/damon: replace most damon_callback usages in sysfs with new core functions" from SeongJae Park cleans up and generalizes DAMON's sysfs file interface logic - "mm/damon: enable page level properties based monitoring" from SeongJae Park increases the amount of information which is presented in response to DAMOS actions - "mm/damon: remove DAMON debugfs interface" from SeongJae Park removes DAMON's long-deprecated debugfs interfaces. Thus the migration to sysfs is completed - "mm/hugetlb: Refactor hugetlb allocation resv accounting" from Peter Xu cleans up and generalizes the hugetlb reservation accounting - "mm: alloc_pages_bulk: small API refactor" from Luiz Capitulino removes a never-used feature of the alloc_pages_bulk() interface - "mm/damon: extend DAMOS filters for inclusion" from SeongJae Park extends DAMOS filters to support not only exclusion (rejecting), but also inclusion (allowing) behavior - "Add zpdesc memory descriptor for zswap.zpool" from Alex Shi introduces a new memory descriptor for zswap.zpool that currently overlaps with struct page for now. This is part of the effort to reduce the size of struct page and to enable dynamic allocation of memory descriptors - "mm, swap: rework of swap allocator locks" from Kairui Song redoes and simplifies the swap allocator locking. A speedup of 400% was demonstrated for one workload. As was a 35% reduction for kernel build time with swap-on-zram - "mm: update mips to use do_mmap(), make mmap_region() internal" from Lorenzo Stoakes reworks MIPS's use of mmap_region() so that mmap_region() can be made MM-internal - "mm/mglru: performance optimizations" from Yu Zhao fixes a few MGLRU regressions and otherwise improves MGLRU performance - "Docs/mm/damon: add tuning guide and misc updates" from SeongJae Park updates DAMON documentation - "Cleanup for memfd_create()" from Isaac Manjarres does that thing - "mm: hugetlb+THP folio and migration cleanups" from David Hildenbrand provides various cleanups in the areas of hugetlb folios, THP folios and migration - "Uncached buffered IO" from Jens Axboe implements the new RWF_DONTCACHE flag which provides synchronous dropbehind for pagecache reading and writing. To permite userspace to address issues with massive buildup of useless pagecache when reading/writing fast devices - "selftests/mm: virtual_address_range: Reduce memory" from Thomas Weißschuh fixes and optimizes some of the MM selftests" * tag 'mm-stable-2025-01-26-14-59' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (321 commits) mm/compaction: fix UBSAN shift-out-of-bounds warning s390/mm: add missing ctor/dtor on page table upgrade kasan: sw_tags: use str_on_off() helper in kasan_init_sw_tags() tools: add VM_WARN_ON_VMG definition mm/damon/core: use str_high_low() helper in damos_wmark_wait_us() seqlock: add missing parameter documentation for raw_seqcount_try_begin() mm/page-writeback: consolidate wb_thresh bumping logic into __wb_calc_thresh mm/page_alloc: remove the incorrect and misleading comment zram: remove zcomp_stream_put() from write_incompressible_page() mm: separate move/undo parts from migrate_pages_batch() mm/kfence: use str_write_read() helper in get_access_type() selftests/mm/mkdirty: fix memory leak in test_uffdio_copy() kasan: hw_tags: Use str_on_off() helper in kasan_init_hw_tags() selftests/mm: virtual_address_range: avoid reading from VM_IO mappings selftests/mm: vm_util: split up /proc/self/smaps parsing selftests/mm: virtual_address_range: unmap chunks after validation selftests/mm: virtual_address_range: mmap() without PROT_WRITE selftests/memfd/memfd_test: fix possible NULL pointer dereference mm: add FGP_DONTCACHE folio creation flag mm: call filemap_fdatawrite_range_kick() after IOCB_DONTCACHE issue ...
9.5 KiB
SPDX-License-Identifier: GPL-2.0-only
menuconfig SAMPLES bool "Sample kernel code" help You can build and test sample kernel code here.
if SAMPLES
config SAMPLE_AUXDISPLAY bool "auxdisplay sample" depends on CC_CAN_LINK
config SAMPLE_TRACE_EVENTS tristate "Build trace_events examples -- loadable modules only" depends on EVENT_TRACING && m help This builds the trace event example module.
config SAMPLE_TRACE_CUSTOM_EVENTS tristate "Build custom trace event example -- loadable modules only" depends on EVENT_TRACING && m help This builds the custom trace event example module.
config SAMPLE_TRACE_PRINTK tristate "Build trace_printk module - tests various trace_printk formats" depends on EVENT_TRACING && m help This builds a module that calls trace_printk() and can be used to test various trace_printk() calls from a module.
config SAMPLE_FTRACE_DIRECT tristate "Build register_ftrace_direct() example" depends on DYNAMIC_FTRACE_WITH_DIRECT_CALLS && m depends on HAVE_SAMPLE_FTRACE_DIRECT help This builds an ftrace direct function example that hooks to wake_up_process and prints the parameters.
config SAMPLE_FTRACE_DIRECT_MULTI tristate "Build register_ftrace_direct() on multiple ips example" depends on DYNAMIC_FTRACE_WITH_DIRECT_CALLS && m depends on HAVE_SAMPLE_FTRACE_DIRECT_MULTI help This builds an ftrace direct function example that hooks to wake_up_process and schedule, and prints the function addresses.
config SAMPLE_FTRACE_OPS tristate "Build custom ftrace ops example" depends on FUNCTION_TRACER help This builds an ftrace ops example that hooks two functions and measures the time taken to invoke one function a number of times.
config SAMPLE_TRACE_ARRAY tristate "Build sample module for kernel access to Ftrace instancess" depends on EVENT_TRACING && m help This builds a module that demonstrates the use of various APIs to access Ftrace instances from within the kernel.
config SAMPLE_KOBJECT tristate "Build kobject examples" help This config option will allow you to build a number of different kobject sample modules showing how to use kobjects, ksets, and ktypes properly.
If in doubt, say "N" here.
config SAMPLE_KPROBES tristate "Build kprobes examples -- loadable modules only" depends on KPROBES && m help This build several kprobes example modules.
config SAMPLE_KRETPROBES tristate "Build kretprobes example -- loadable modules only" default m depends on SAMPLE_KPROBES && KRETPROBES
config SAMPLE_HW_BREAKPOINT tristate "Build kernel hardware breakpoint examples -- loadable module only" depends on HAVE_HW_BREAKPOINT && m help This builds kernel hardware breakpoint example modules.
config SAMPLE_FPROBE tristate "Build fprobe examples -- loadable modules only" depends on FPROBE && m help This builds a fprobe example module. This module has an option 'symbol'. You can specify a probed symbol or symbols separated with ','.
config SAMPLE_KFIFO tristate "Build kfifo examples -- loadable modules only" depends on m help This config option will allow you to build a number of different kfifo sample modules showing how to use the generic kfifo API.
If in doubt, say "N" here.
config SAMPLE_KDB tristate "Build kdb command example -- loadable modules only" depends on KGDB_KDB && m help Build an example of how to dynamically add the hello command to the kdb shell.
config SAMPLE_QMI_CLIENT tristate "Build qmi client sample -- loadable modules only" depends on m depends on ARCH_QCOM depends on NET select QCOM_QMI_HELPERS help Build an QMI client sample driver, which demonstrates how to communicate with a remote QRTR service, using QMI encoded messages.
config SAMPLE_RPMSG_CLIENT tristate "Build rpmsg client sample -- loadable modules only" depends on RPMSG && m help Build an rpmsg client sample driver, which demonstrates how to communicate with an AMP-configured remote processor over the rpmsg bus.
config SAMPLE_LIVEPATCH tristate "Build live patching samples -- loadable modules only" depends on LIVEPATCH && m help Build sample live patch demonstrations.
config SAMPLE_CONFIGFS tristate "Build configfs patching sample -- loadable modules only" depends on CONFIGFS_FS && m help Builds a sample configfs interface.
config SAMPLE_CONNECTOR tristate "Build connector sample -- loadable modules only" depends on CONNECTOR && HEADERS_INSTALL && m help When enabled, this builds both a sample kernel module for the connector interface and a user space tool to communicate with it. See also Documentation/driver-api/connector.rst
config SAMPLE_FANOTIFY_ERROR bool "Build fanotify error monitoring sample" depends on FANOTIFY && CC_CAN_LINK && HEADERS_INSTALL help When enabled, this builds an example code that uses the FAN_FS_ERROR fanotify mechanism to monitor filesystem errors. See also Documentation/admin-guide/filesystem-monitoring.rst.
config SAMPLE_HIDRAW bool "hidraw sample" depends on CC_CAN_LINK && HEADERS_INSTALL
config SAMPLE_LANDLOCK bool "Landlock example" depends on CC_CAN_LINK && HEADERS_INSTALL help Build a simple Landlock sandbox manager able to start a process restricted by a user-defined filesystem access control policy.
config SAMPLE_PIDFD bool "pidfd sample" depends on CC_CAN_LINK && HEADERS_INSTALL
config SAMPLE_SECCOMP bool "Build seccomp sample code" depends on SECCOMP_FILTER && CC_CAN_LINK && HEADERS_INSTALL help Build samples of seccomp filters using various methods of BPF filter construction.
config SAMPLE_TIMER bool "Timer sample" depends on CC_CAN_LINK && HEADERS_INSTALL
config SAMPLE_UHID bool "UHID sample" depends on CC_CAN_LINK && HEADERS_INSTALL help Build UHID sample program.
config SAMPLE_VFIO_MDEV_MTTY tristate "Build VFIO mtty example mediated device sample code" depends on VFIO select VFIO_MDEV help Build a virtual tty sample driver for use as a VFIO mediated device
config SAMPLE_VFIO_MDEV_MDPY tristate "Build VFIO mdpy example mediated device sample code" depends on VFIO select VFIO_MDEV help Build a virtual display sample driver for use as a VFIO mediated device. It is a simple framebuffer and supports the region display interface (VFIO_GFX_PLANE_TYPE_REGION).
config SAMPLE_VFIO_MDEV_MDPY_FB tristate "Build VFIO mdpy example guest fbdev driver" depends on FB select FB_IOMEM_HELPERS help Guest fbdev driver for the virtual display sample driver.
config SAMPLE_VFIO_MDEV_MBOCHS tristate "Build VFIO mbochs example mediated device sample code" depends on VFIO select VFIO_MDEV select DMA_SHARED_BUFFER help Build a virtual display sample driver for use as a VFIO mediated device. It supports the region display interface (VFIO_GFX_PLANE_TYPE_DMABUF). Emulate enough of qemu stdvga to make bochs-drm.ko happy. That is basically the vram memory bar and the bochs dispi interface vbe registers in the mmio register bar. Specifically it does not include any legacy vga stuff. Device looks a lot like "qemu -device secondary-vga".
config SAMPLE_ANDROID_BINDERFS bool "Build Android binderfs example" depends on CC_CAN_LINK && HEADERS_INSTALL help Builds a sample program to illustrate the use of the Android binderfs filesystem.
config SAMPLE_VFS bool "Build example programs that use new VFS system calls" depends on CC_CAN_LINK && HEADERS_INSTALL help Build example userspace programs that use new VFS system calls such as mount API and statx(). Note that this is restricted to the x86 arch whilst it accesses system calls that aren't yet in all arches.
config SAMPLE_INTEL_MEI bool "Build example program working with intel mei driver" depends on INTEL_MEI depends on CC_CAN_LINK && HEADERS_INSTALL help Build a sample program to work with mei device.
config SAMPLE_TPS6594_PFSM bool "Build example program working with TPS6594 PFSM driver" depends on HEADERS_INSTALL depends on CC_CAN_LINK help Build a sample program to work with PFSM devices.
config SAMPLE_WATCHDOG bool "watchdog sample" depends on CC_CAN_LINK
config SAMPLE_WATCH_QUEUE bool "Build example watch_queue notification API consumer" depends on CC_CAN_LINK && HEADERS_INSTALL help Build example userspace program to use the new mount_notify(), sb_notify() syscalls and the KEYCTL_WATCH_KEY keyctl() function.
config SAMPLE_CORESIGHT_SYSCFG tristate "Build example loadable module for CoreSight config" depends on CORESIGHT && m help Build an example loadable module that adds new CoreSight features and configuration using the CoreSight system configuration API. This demonstrates how a user may create their own CoreSight configurations and easily load them into the system at runtime.
config SAMPLE_KMEMLEAK tristate "Simple test for the kernel memory leak detector" depends on DEBUG_KMEMLEAK && m help Build a sample program which have explicitly leaks memory to test kmemleak
config SAMPLE_CGROUP bool "Build cgroup sample code" depends on CGROUPS && CC_CAN_LINK && HEADERS_INSTALL help Build samples that demonstrate the usage of the cgroup API.
config SAMPLE_CHECK_EXEC bool "Exec secure bits examples" depends on CC_CAN_LINK && HEADERS_INSTALL help Build a tool to easily configure SECBIT_EXEC_RESTRICT_FILE and SECBIT_EXEC_DENY_INTERACTIVE, and a simple script interpreter to demonstrate how they should be used with execveat(2) + AT_EXECVE_CHECK.
source "samples/rust/Kconfig"
source "samples/damon/Kconfig"
endif # SAMPLES
config HAVE_SAMPLE_FTRACE_DIRECT bool
config HAVE_SAMPLE_FTRACE_DIRECT_MULTI bool