linux-stable.git/Documentation/dev-tools, branch v6.11 Linux kernel stable tree Merge tag 'mm-stable-2024-07-21-14-50' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm 2024-07-22T00:15:46+00:00 Linus Torvalds torvalds@linux-foundation.org 2024-07-22T00:15:46+00:00 fbc90c042cd1dc7258ebfebe6d226017e5b5ac8c Pull MM updates from Andrew Morton: - In the series "mm: Avoid possible overflows in dirty throttling" Jan Kara addresses a couple of issues in the writeback throttling code. These fixes are also targetted at -stable kernels. - Ryusuke Konishi's series "nilfs2: fix potential issues related to reserved inodes" does that. This should actually be in the mm-nonmm-stable tree, along with the many other nilfs2 patches. My bad. - More folio conversions from Kefeng Wang in the series "mm: convert to folio_alloc_mpol()" - Kemeng Shi has sent some cleanups to the writeback code in the series "Add helper functions to remove repeated code and improve readability of cgroup writeback" - Kairui Song has made the swap code a little smaller and a little faster in the series "mm/swap: clean up and optimize swap cache index". - In the series "mm/memory: cleanly support zeropage in vm_insert_page*(), vm_map_pages*() and vmf_insert_mixed()" David Hildenbrand has reworked the rather sketchy handling of the use of the zeropage in MAP_SHARED mappings. I don't see any runtime effects here - more a cleanup/understandability/maintainablity thing. - Dev Jain has improved selftests/mm/va_high_addr_switch.c's handling of higher addresses, for aarch64. The (poorly named) series is "Restructure va_high_addr_switch". - The core TLB handling code gets some cleanups and possible slight optimizations in Bang Li's series "Add update_mmu_tlb_range() to simplify code". - Jane Chu has improved the handling of our fake-an-unrecoverable-memory-error testing feature MADV_HWPOISON in the series "Enhance soft hwpoison handling and injection". - Jeff Johnson has sent a billion patches everywhere to add MODULE_DESCRIPTION() to everything. Some landed in this pull. - In the series "mm: cleanup MIGRATE_SYNC_NO_COPY mode", Kefeng Wang has simplified migration's use of hardware-offload memory copying. - Yosry Ahmed performs more folio API conversions in his series "mm: zswap: trivial folio conversions". - In the series "large folios swap-in: handle refault cases first", Chuanhua Han inches us forward in the handling of large pages in the swap code. This is a cleanup and optimization, working toward the end objective of full support of large folio swapin/out. - In the series "mm,swap: cleanup VMA based swap readahead window calculation", Huang Ying has contributed some cleanups and a possible fixlet to his VMA based swap readahead code. - In the series "add mTHP support for anonymous shmem" Baolin Wang has taught anonymous shmem mappings to use multisize THP. By default this is a no-op - users must opt in vis sysfs controls. Dramatic improvements in pagefault latency are realized. - David Hildenbrand has some cleanups to our remaining use of page_mapcount() in the series "fs/proc: move page_mapcount() to fs/proc/internal.h". - David also has some highmem accounting cleanups in the series "mm/highmem: don't track highmem pages manually". - Build-time fixes and cleanups from John Hubbard in the series "cleanups, fixes, and progress towards avoiding "make headers"". - Cleanups and consolidation of the core pagemap handling from Barry Song in the series "mm: introduce pmd|pte_needs_soft_dirty_wp helpers and utilize them". - Lance Yang's series "Reclaim lazyfree THP without splitting" has reduced the latency of the reclaim of pmd-mapped THPs under fairly common circumstances. A 10x speedup is seen in a microbenchmark. It does this by punting to aother CPU but I guess that's a win unless all CPUs are pegged. - hugetlb_cgroup cleanups from Xiu Jianfeng in the series "mm/hugetlb_cgroup: rework on cftypes". - Miaohe Lin's series "Some cleanups for memory-failure" does just that thing. - Someone other than SeongJae has developed a DAMON feature in Honggyu Kim's series "DAMON based tiered memory management for CXL memory". This adds DAMON features which may be used to help determine the efficiency of our placement of CXL/PCIe attached DRAM. - DAMON user API centralization and simplificatio work in SeongJae Park's series "mm/damon: introduce DAMON parameters online commit function". - In the series "mm: page_type, zsmalloc and page_mapcount_reset()" David Hildenbrand does some maintenance work on zsmalloc - partially modernizing its use of pageframe fields. - Kefeng Wang provides more folio conversions in the series "mm: remove page_maybe_dma_pinned() and page_mkclean()". - More cleanup from David Hildenbrand, this time in the series "mm/memory_hotplug: use PageOffline() instead of PageReserved() for !ZONE_DEVICE". It "enlightens memory hotplug more about PageOffline() pages" and permits the removal of some virtio-mem hacks. - Barry Song's series "mm: clarify folio_add_new_anon_rmap() and __folio_add_anon_rmap()" is a cleanup to the anon folio handling in preparation for mTHP (multisize THP) swapin. - Kefeng Wang's series "mm: improve clear and copy user folio" implements more folio conversions, this time in the area of large folio userspace copying. - The series "Docs/mm/damon/maintaier-profile: document a mailing tool and community meetup series" tells people how to get better involved with other DAMON developers. From SeongJae Park. - A large series ("kmsan: Enable on s390") from Ilya Leoshkevich does that. - David Hildenbrand sends along more cleanups, this time against the migration code. The series is "mm/migrate: move NUMA hinting fault folio isolation + checks under PTL". - Jan Kara has found quite a lot of strangenesses and minor errors in the readahead code. He addresses this in the series "mm: Fix various readahead quirks". - SeongJae Park's series "selftests/damon: test DAMOS tried regions and {min,max}_nr_regions" adds features and addresses errors in DAMON's self testing code. - Gavin Shan has found a userspace-triggerable WARN in the pagecache code. The series "mm/filemap: Limit page cache size to that supported by xarray" addresses this. The series is marked cc:stable. - Chengming Zhou's series "mm/ksm: cmp_and_merge_page() optimizations and cleanup" cleans up and slightly optimizes KSM. - Roman Gushchin has separated the memcg-v1 and memcg-v2 code - lots of code motion. The series (which also makes the memcg-v1 code Kconfigurable) are "mm: memcg: separate legacy cgroup v1 code and put under config option" and "mm: memcg: put cgroup v1-specific memcg data under CONFIG_MEMCG_V1" - Dan Schatzberg's series "Add swappiness argument to memory.reclaim" adds an additional feature to this cgroup-v2 control file. - The series "Userspace controls soft-offline pages" from Jiaqi Yan permits userspace to stop the kernel's automatic treatment of excessive correctable memory errors. In order to permit userspace to monitor and handle this situation. - Kefeng Wang's series "mm: migrate: support poison recover from migrate folio" teaches the kernel to appropriately handle migration from poisoned source folios rather than simply panicing. - SeongJae Park's series "Docs/damon: minor fixups and improvements" does those things. - In the series "mm/zsmalloc: change back to per-size_class lock" Chengming Zhou improves zsmalloc's scalability and memory utilization. - Vivek Kasireddy's series "mm/gup: Introduce memfd_pin_folios() for pinning memfd folios" makes the GUP code use FOLL_PIN rather than bare refcount increments. So these paes can first be moved aside if they reside in the movable zone or a CMA block. - Andrii Nakryiko has added a binary ioctl()-based API to /proc/pid/maps for much faster reading of vma information. The series is "query VMAs from /proc/<pid>/maps". - In the series "mm: introduce per-order mTHP split counters" Lance Yang improves the kernel's presentation of developer information related to multisize THP splitting. - Michael Ellerman has developed the series "Reimplement huge pages without hugepd on powerpc (8xx, e500, book3s/64)". This permits userspace to use all available huge page sizes. - In the series "revert unconditional slab and page allocator fault injection calls" Vlastimil Babka removes a performance-affecting and not very useful feature from slab fault injection. * tag 'mm-stable-2024-07-21-14-50' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (411 commits) mm/mglru: fix ineffective protection calculation mm/zswap: fix a white space issue mm/hugetlb: fix kernel NULL pointer dereference when migrating hugetlb folio mm/hugetlb: fix possible recursive locking detected warning mm/gup: clear the LRU flag of a page before adding to LRU batch mm/numa_balancing: teach mpol_to_str about the balancing mode mm: memcg1: convert charge move flags to unsigned long long alloc_tag: fix page_ext_get/page_ext_put sequence during page splitting lib: reuse page_ext_data() to obtain codetag_ref lib: add missing newline character in the warning message mm/mglru: fix overshooting shrinker memory mm/mglru: fix div-by-zero in vmpressure_calc_level() mm/kmemleak: replace strncpy() with strscpy() mm, page_alloc: put should_fail_alloc_page() back behing CONFIG_FAIL_PAGE_ALLOC mm, slab: put should_failslab() back behind CONFIG_SHOULD_FAILSLAB mm: ignore data-race in __swap_writepage hugetlbfs: ensure generic_hugetlb_get_unmapped_area() returns higher address than mmap_min_addr mm: shmem: rename mTHP shmem counters mm: swap_state: use folio_alloc_mpol() in __read_swap_cache_async() mm/migrate: putback split folios when numa hint migration fails ... 
Pull MM updates from Andrew Morton:

 - In the series "mm: Avoid possible overflows in dirty throttling" Jan
   Kara addresses a couple of issues in the writeback throttling code.
   These fixes are also targetted at -stable kernels.

 - Ryusuke Konishi's series "nilfs2: fix potential issues related to
   reserved inodes" does that. This should actually be in the
   mm-nonmm-stable tree, along with the many other nilfs2 patches. My
   bad.

 - More folio conversions from Kefeng Wang in the series "mm: convert to
   folio_alloc_mpol()"

 - Kemeng Shi has sent some cleanups to the writeback code in the series
   "Add helper functions to remove repeated code and improve readability
   of cgroup writeback"

 - Kairui Song has made the swap code a little smaller and a little
   faster in the series "mm/swap: clean up and optimize swap cache
   index".

 - In the series "mm/memory: cleanly support zeropage in
   vm_insert_page*(), vm_map_pages*() and vmf_insert_mixed()" David
   Hildenbrand has reworked the rather sketchy handling of the use of
   the zeropage in MAP_SHARED mappings. I don't see any runtime effects
   here - more a cleanup/understandability/maintainablity thing.

 - Dev Jain has improved selftests/mm/va_high_addr_switch.c's handling
   of higher addresses, for aarch64. The (poorly named) series is
   "Restructure va_high_addr_switch".

 - The core TLB handling code gets some cleanups and possible slight
   optimizations in Bang Li's series "Add update_mmu_tlb_range() to
   simplify code".

 - Jane Chu has improved the handling of our
   fake-an-unrecoverable-memory-error testing feature MADV_HWPOISON in
   the series "Enhance soft hwpoison handling and injection".

 - Jeff Johnson has sent a billion patches everywhere to add
   MODULE_DESCRIPTION() to everything. Some landed in this pull.

 - In the series "mm: cleanup MIGRATE_SYNC_NO_COPY mode", Kefeng Wang
   has simplified migration's use of hardware-offload memory copying.

 - Yosry Ahmed performs more folio API conversions in his series "mm:
   zswap: trivial folio conversions".

 - In the series "large folios swap-in: handle refault cases first",
   Chuanhua Han inches us forward in the handling of large pages in the
   swap code. This is a cleanup and optimization, working toward the end
   objective of full support of large folio swapin/out.

 - In the series "mm,swap: cleanup VMA based swap readahead window
   calculation", Huang Ying has contributed some cleanups and a possible
   fixlet to his VMA based swap readahead code.

 - In the series "add mTHP support for anonymous shmem" Baolin Wang has
   taught anonymous shmem mappings to use multisize THP. By default this
   is a no-op - users must opt in vis sysfs controls. Dramatic
   improvements in pagefault latency are realized.

 - David Hildenbrand has some cleanups to our remaining use of
   page_mapcount() in the series "fs/proc: move page_mapcount() to
   fs/proc/internal.h".

 - David also has some highmem accounting cleanups in the series
   "mm/highmem: don't track highmem pages manually".

 - Build-time fixes and cleanups from John Hubbard in the series
   "cleanups, fixes, and progress towards avoiding "make headers"".

 - Cleanups and consolidation of the core pagemap handling from Barry
   Song in the series "mm: introduce pmd|pte_needs_soft_dirty_wp helpers
   and utilize them".

 - Lance Yang's series "Reclaim lazyfree THP without splitting" has
   reduced the latency of the reclaim of pmd-mapped THPs under fairly
   common circumstances. A 10x speedup is seen in a microbenchmark.

   It does this by punting to aother CPU but I guess that's a win unless
   all CPUs are pegged.

 - hugetlb_cgroup cleanups from Xiu Jianfeng in the series
   "mm/hugetlb_cgroup: rework on cftypes".

 - Miaohe Lin's series "Some cleanups for memory-failure" does just that
   thing.

 - Someone other than SeongJae has developed a DAMON feature in Honggyu
   Kim's series "DAMON based tiered memory management for CXL memory".
   This adds DAMON features which may be used to help determine the
   efficiency of our placement of CXL/PCIe attached DRAM.

 - DAMON user API centralization and simplificatio work in SeongJae
   Park's series "mm/damon: introduce DAMON parameters online commit
   function".

 - In the series "mm: page_type, zsmalloc and page_mapcount_reset()"
   David Hildenbrand does some maintenance work on zsmalloc - partially
   modernizing its use of pageframe fields.

 - Kefeng Wang provides more folio conversions in the series "mm: remove
   page_maybe_dma_pinned() and page_mkclean()".

 - More cleanup from David Hildenbrand, this time in the series
   "mm/memory_hotplug: use PageOffline() instead of PageReserved() for
   !ZONE_DEVICE". It "enlightens memory hotplug more about PageOffline()
   pages" and permits the removal of some virtio-mem hacks.

 - Barry Song's series "mm: clarify folio_add_new_anon_rmap() and
   __folio_add_anon_rmap()" is a cleanup to the anon folio handling in
   preparation for mTHP (multisize THP) swapin.

 - Kefeng Wang's series "mm: improve clear and copy user folio"
   implements more folio conversions, this time in the area of large
   folio userspace copying.

 - The series "Docs/mm/damon/maintaier-profile: document a mailing tool
   and community meetup series" tells people how to get better involved
   with other DAMON developers. From SeongJae Park.

 - A large series ("kmsan: Enable on s390") from Ilya Leoshkevich does
   that.

 - David Hildenbrand sends along more cleanups, this time against the
   migration code. The series is "mm/migrate: move NUMA hinting fault
   folio isolation + checks under PTL".

 - Jan Kara has found quite a lot of strangenesses and minor errors in
   the readahead code. He addresses this in the series "mm: Fix various
   readahead quirks".

 - SeongJae Park's series "selftests/damon: test DAMOS tried regions and
   {min,max}_nr_regions" adds features and addresses errors in DAMON's
   self testing code.

 - Gavin Shan has found a userspace-triggerable WARN in the pagecache
   code. The series "mm/filemap: Limit page cache size to that supported
   by xarray" addresses this. The series is marked cc:stable.

 - Chengming Zhou's series "mm/ksm: cmp_and_merge_page() optimizations
   and cleanup" cleans up and slightly optimizes KSM.

 - Roman Gushchin has separated the memcg-v1 and memcg-v2 code - lots of
   code motion. The series (which also makes the memcg-v1 code
   Kconfigurable) are "mm: memcg: separate legacy cgroup v1 code and put
   under config option" and "mm: memcg: put cgroup v1-specific memcg
   data under CONFIG_MEMCG_V1"

 - Dan Schatzberg's series "Add swappiness argument to memory.reclaim"
   adds an additional feature to this cgroup-v2 control file.

 - The series "Userspace controls soft-offline pages" from Jiaqi Yan
   permits userspace to stop the kernel's automatic treatment of
   excessive correctable memory errors. In order to permit userspace to
   monitor and handle this situation.

 - Kefeng Wang's series "mm: migrate: support poison recover from
   migrate folio" teaches the kernel to appropriately handle migration
   from poisoned source folios rather than simply panicing.

 - SeongJae Park's series "Docs/damon: minor fixups and improvements"
   does those things.

 - In the series "mm/zsmalloc: change back to per-size_class lock"
   Chengming Zhou improves zsmalloc's scalability and memory
   utilization.

 - Vivek Kasireddy's series "mm/gup: Introduce memfd_pin_folios() for
   pinning memfd folios" makes the GUP code use FOLL_PIN rather than
   bare refcount increments. So these paes can first be moved aside if
   they reside in the movable zone or a CMA block.

 - Andrii Nakryiko has added a binary ioctl()-based API to
   /proc/pid/maps for much faster reading of vma information. The series
   is "query VMAs from /proc/<pid>/maps".

 - In the series "mm: introduce per-order mTHP split counters" Lance
   Yang improves the kernel's presentation of developer information
   related to multisize THP splitting.

 - Michael Ellerman has developed the series "Reimplement huge pages
   without hugepd on powerpc (8xx, e500, book3s/64)". This permits
   userspace to use all available huge page sizes.

 - In the series "revert unconditional slab and page allocator fault
   injection calls" Vlastimil Babka removes a performance-affecting and
   not very useful feature from slab fault injection.

* tag 'mm-stable-2024-07-21-14-50' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (411 commits)
  mm/mglru: fix ineffective protection calculation
  mm/zswap: fix a white space issue
  mm/hugetlb: fix kernel NULL pointer dereference when migrating hugetlb folio
  mm/hugetlb: fix possible recursive locking detected warning
  mm/gup: clear the LRU flag of a page before adding to LRU batch
  mm/numa_balancing: teach mpol_to_str about the balancing mode
  mm: memcg1: convert charge move flags to unsigned long long
  alloc_tag: fix page_ext_get/page_ext_put sequence during page splitting
  lib: reuse page_ext_data() to obtain codetag_ref
  lib: add missing newline character in the warning message
  mm/mglru: fix overshooting shrinker memory
  mm/mglru: fix div-by-zero in vmpressure_calc_level()
  mm/kmemleak: replace strncpy() with strscpy()
  mm, page_alloc: put should_fail_alloc_page() back behing CONFIG_FAIL_PAGE_ALLOC
  mm, slab: put should_failslab() back behind CONFIG_SHOULD_FAILSLAB
  mm: ignore data-race in __swap_writepage
  hugetlbfs: ensure generic_hugetlb_get_unmapped_area() returns higher address than mmap_min_addr
  mm: shmem: rename mTHP shmem counters
  mm: swap_state: use folio_alloc_mpol() in __read_swap_cache_async()
  mm/migrate: putback split folios when numa hint migration fails
  ...
Merge tag 'docs-6.11' of git://git.lwn.net/linux 2024-07-18T22:54:16+00:00 Linus Torvalds torvalds@linux-foundation.org 2024-07-18T22:54:16+00:00 cf05e93af423b225fb3e3237e7d46493c7909f2b Pull documentation updates from Jonathan Corbet: "Nothing hugely exciting happening in the documentation tree this time around, mostly more of the usual: - More Spanish, Italian, and Chinese translations - A new script, scripts/checktransupdate.py, can be used to see which commits have touched an (English) document since a given translation was last updated. - A couple of "best practices" suggestions (on Link: tags and off-list discussions) that were not entirely at consensus level, but I concluded they were close enough to accept. - Some nice cleanups removing documentation for kernel parameters that have not been recognized for ... a long time. ...along with the usual updates, typo fixes, and such" * tag 'docs-6.11' of git://git.lwn.net/linux: (57 commits) Documentation: Document user_events ioctl code docs/pinctrl: fix typo in mapping example docs: maintainer: discourage taking conversations off-list docs: driver-model: platform: update the definition of platform_driver docs/sp_SP: Add translation for scheduler/sched-design-CFS.rst writing_musb_glue_layer.rst: Fix broken URL zh_CN/admin-guide: one typo fix docs/zh_CN/virt: Update the translation of guest-halt-polling.rst Documentation: add reference from dynamic debug to loglevel kernel params Documentation: best practices for using Link trailers Documentation: fix links to mailing list services Documentation: exception-tables.rst: Fix the wrong steps referenced docs/zh_CN: add process/researcher-guidelines Chinese translation Documentation/tools/rv: fix document header docs/sp_SP: Add translation of process/maintainer-kvm-x86.rst docs/admin-guide/mm: correct typo 'quired' to 'queried' Add libps2 to the input section of driver-api Docs/mm/index: move allocation profiling document to unsorted documents chapter Docs/mm/index: rename 'Legacy Documentation' to 'Unsorted Documentation' Docs/mm/index: Remove 'Memory Management Guide' chapter marker ... 
Pull documentation updates from Jonathan Corbet:
 "Nothing hugely exciting happening in the documentation tree this time
  around, mostly more of the usual:

   - More Spanish, Italian, and Chinese translations

   - A new script, scripts/checktransupdate.py, can be used to see which
     commits have touched an (English) document since a given
     translation was last updated.

   - A couple of "best practices" suggestions (on Link: tags and
     off-list discussions) that were not entirely at consensus level,
     but I concluded they were close enough to accept.

   - Some nice cleanups removing documentation for kernel parameters
     that have not been recognized for ... a long time.

  ...along with the usual updates, typo fixes, and such"

* tag 'docs-6.11' of git://git.lwn.net/linux: (57 commits)
  Documentation: Document user_events ioctl code
  docs/pinctrl: fix typo in mapping example
  docs: maintainer: discourage taking conversations off-list
  docs: driver-model: platform: update the definition of platform_driver
  docs/sp_SP: Add translation for scheduler/sched-design-CFS.rst
  writing_musb_glue_layer.rst: Fix broken URL
  zh_CN/admin-guide: one typo fix
  docs/zh_CN/virt: Update the translation of guest-halt-polling.rst
  Documentation: add reference from dynamic debug to loglevel kernel params
  Documentation: best practices for using Link trailers
  Documentation: fix links to mailing list services
  Documentation: exception-tables.rst: Fix the wrong steps referenced
  docs/zh_CN: add process/researcher-guidelines Chinese translation
  Documentation/tools/rv: fix document header
  docs/sp_SP: Add translation of process/maintainer-kvm-x86.rst
  docs/admin-guide/mm: correct typo 'quired' to 'queried'
  Add libps2 to the input section of driver-api
  Docs/mm/index: move allocation profiling document to unsorted documents chapter
  Docs/mm/index: rename 'Legacy Documentation' to 'Unsorted Documentation'
  Docs/mm/index: Remove 'Memory Management Guide' chapter marker
  ...
Merge tag 'linux_kselftest-next-6.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest 2024-07-17T00:45:33+00:00 Linus Torvalds torvalds@linux-foundation.org 2024-07-17T00:45:33+00:00 0434dbe32053d07d658165be681505120c6b1abc Pull kselftest updates from Shuah Khan: - change resctrl test to cleanup resctrl_val() and generalize it by removing test name specific handling from the function. - several clang build failure fixes to framework and tests - add tests to verify IFS (In Field Scan) driver functionality - cleanups to remove unused variables and document changes * tag 'linux_kselftest-next-6.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest: (33 commits) selftests: ifs: verify IFS ARRAY BIST functionality selftests: ifs: verify IFS scan test functionality selftests: ifs: verify test image loading functionality selftests: ifs: verify test interfaces are created by the driver selftests/dma:remove unused variable selftests/breakpoints:Remove unused variable selftests/x86: fix printk warnings reported by clang selftests/x86: remove (or use) unused variables and functions selftests/x86: avoid -no-pie warnings from clang during compilation selftests/x86: build sysret_rip.c with clang selftests/x86: build fsgsbase_restore.c with clang selftests: x86: test_FISTTP: use fisttps instead of ambiguous fisttp selftests/x86: fix Makefile dependencies to work with clang selftests/timers: remove unused irqcount variable selftests: Add information about TAP conformance in tests selftests/resctrl: Remove test name comparing from write_bm_pid_to_resctrl() selftests/resctrl: Remove mongrp from CMT test selftests/resctrl: Remove mongrp from MBA test selftests/resctrl: Convert ctrlgrp & mongrp to pointers selftests/resctrl: Make some strings passed to resctrlfs functions const ... 
Pull kselftest updates from Shuah Khan:

 - change resctrl test to cleanup resctrl_val() and generalize it by
   removing test name specific handling from the function.

 - several clang build failure fixes to framework and tests

 - add tests to verify IFS (In Field Scan) driver functionality

 - cleanups to remove unused variables and document changes

* tag 'linux_kselftest-next-6.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest: (33 commits)
  selftests: ifs: verify IFS ARRAY BIST functionality
  selftests: ifs: verify IFS scan test functionality
  selftests: ifs: verify test image loading functionality
  selftests: ifs: verify test interfaces are created by the driver
  selftests/dma:remove unused variable
  selftests/breakpoints:Remove unused variable
  selftests/x86: fix printk warnings reported by clang
  selftests/x86: remove (or use) unused variables and functions
  selftests/x86: avoid -no-pie warnings from clang during compilation
  selftests/x86: build sysret_rip.c with clang
  selftests/x86: build fsgsbase_restore.c with clang
  selftests: x86: test_FISTTP: use fisttps instead of ambiguous fisttp
  selftests/x86: fix Makefile dependencies to work with clang
  selftests/timers: remove unused irqcount variable
  selftests: Add information about TAP conformance in tests
  selftests/resctrl: Remove test name comparing from write_bm_pid_to_resctrl()
  selftests/resctrl: Remove mongrp from CMT test
  selftests/resctrl: Remove mongrp from MBA test
  selftests/resctrl: Convert ctrlgrp & mongrp to pointers
  selftests/resctrl: Make some strings passed to resctrlfs functions const
  ...
selftests: Add information about TAP conformance in tests 2024-07-11T17:23:54+00:00 Muhammad Usama Anjum usama.anjum@collabora.com 2024-06-12T07:27:23+00:00 b00db6fd2a301c5057d63c19d596818845c9a603 Although "TAP" word is being used already in documentation, but it hasn't been defined in informative way for developers that how to write TAP conformant tests and what are the benefits. Write a short brief about it. Signed-off-by: Muhammad Usama Anjum <usama.anjum@collabora.com> Signed-off-by: Shuah Khan <skhan@linuxfoundation.org> 
Although "TAP" word is being used already in documentation, but it hasn't
been defined in informative way for developers that how to write TAP
conformant tests and what are the benefits. Write a short brief about it.

Signed-off-by: Muhammad Usama Anjum <usama.anjum@collabora.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
kmsan: allow disabling KMSAN checks for the current task 2024-07-04T02:30:22+00:00 Ilya Leoshkevich iii@linux.ibm.com 2024-06-21T11:34:55+00:00 ec3e837d8fd96c68599b2861dd412094b7bc335c Like for KASAN, it's useful to temporarily disable KMSAN checks around, e.g., redzone accesses. Introduce kmsan_disable_current() and kmsan_enable_current(), which are similar to their KASAN counterparts. Make them reentrant in order to handle memory allocations in interrupt context. Repurpose the allow_reporting field for this. Link: https://lkml.kernel.org/r/20240621113706.315500-12-iii@linux.ibm.com Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com> Reviewed-by: Alexander Potapenko <glider@google.com> Cc: Alexander Gordeev <agordeev@linux.ibm.com> Cc: Christian Borntraeger <borntraeger@linux.ibm.com> Cc: Christoph Lameter <cl@linux.com> Cc: David Rientjes <rientjes@google.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Heiko Carstens <hca@linux.ibm.com> Cc: Hyeonggon Yoo <42.hyeyoo@gmail.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: <kasan-dev@googlegroups.com> Cc: Marco Elver <elver@google.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Masami Hiramatsu (Google) <mhiramat@kernel.org> Cc: Pekka Enberg <penberg@kernel.org> Cc: Roman Gushchin <roman.gushchin@linux.dev> Cc: Steven Rostedt (Google) <rostedt@goodmis.org> Cc: Sven Schnelle <svens@linux.ibm.com> Cc: Vasily Gorbik <gor@linux.ibm.com> Cc: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> 
Like for KASAN, it's useful to temporarily disable KMSAN checks around,
e.g., redzone accesses.  Introduce kmsan_disable_current() and
kmsan_enable_current(), which are similar to their KASAN counterparts.

Make them reentrant in order to handle memory allocations in interrupt
context.  Repurpose the allow_reporting field for this.

Link: https://lkml.kernel.org/r/20240621113706.315500-12-iii@linux.ibm.com
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Reviewed-by: Alexander Potapenko <glider@google.com>
Cc: Alexander Gordeev <agordeev@linux.ibm.com>
Cc: Christian Borntraeger <borntraeger@linux.ibm.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: Hyeonggon Yoo <42.hyeyoo@gmail.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: <kasan-dev@googlegroups.com>
Cc: Marco Elver <elver@google.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: Roman Gushchin <roman.gushchin@linux.dev>
Cc: Steven Rostedt (Google) <rostedt@goodmis.org>
Cc: Sven Schnelle <svens@linux.ibm.com>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
gpio: add sloppy logic analyzer using polling 2024-07-01T08:54:11+00:00 Wolfram Sang wsa+renesas@sang-engineering.com 2024-06-20T09:41:58+00:00 7828b7bbbf2074dd7dd14d87f50bc5ce9036d692 This is a sloppy logic analyzer using GPIOs. It comes with a script to isolate a CPU for polling. While this is definitely not a production level analyzer, it can be a helpful first view when remote debugging. Read the documentation for details. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Link: https://lore.kernel.org/r/20240620094159.6785-2-wsa+renesas@sang-engineering.com [Bartosz: moved the Kconfig entry into a different category] Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org> 
This is a sloppy logic analyzer using GPIOs. It comes with a script to
isolate a CPU for polling. While this is definitely not a production
level analyzer, it can be a helpful first view when remote debugging.
Read the documentation for details.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20240620094159.6785-2-wsa+renesas@sang-engineering.com
[Bartosz: moved the Kconfig entry into a different category]
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Docs: Move clang-format from process/ to dev-tools/ 2024-06-26T22:36:00+00:00 SeongJae Park sj@kernel.org 2024-06-24T18:53:09+00:00 e3b10a02ca2fe1e27ee008e9fcd8cf7076f7f776 'clang-format' is on 'Other material' section of 'process/index', but it may fit more under 'dev-tools/' directory. Move it. Signed-off-by: SeongJae Park <sj@kernel.org> Acked-by: Miguel Ojeda <ojeda@kernel.org> Acked-by: Federico Vaga <federico.vaga@vaga.pv.it> Signed-off-by: Jonathan Corbet <corbet@lwn.net> Link: https://lore.kernel.org/r/20240624185312.94537-5-sj@kernel.org 
'clang-format' is on 'Other material' section of 'process/index', but it
may fit more under 'dev-tools/' directory.  Move it.

Signed-off-by: SeongJae Park <sj@kernel.org>
Acked-by: Miguel Ojeda <ojeda@kernel.org>
Acked-by: Federico Vaga <federico.vaga@vaga.pv.it>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Link: https://lore.kernel.org/r/20240624185312.94537-5-sj@kernel.org
Merge tag 'mm-nonmm-stable-2024-05-19-11-56' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm 2024-05-19T21:02:03+00:00 Linus Torvalds torvalds@linux-foundation.org 2024-05-19T21:02:03+00:00 eb6a9339efeb6f3d2b5c86fdf2382cdc293eca2c Pull non-mm updates from Andrew Morton: "Mainly singleton patches, documented in their respective changelogs. Notable series include: - Some maintenance and performance work for ocfs2 in Heming Zhao's series "improve write IO performance when fragmentation is high". - Some ocfs2 bugfixes from Su Yue in the series "ocfs2 bugs fixes exposed by fstests". - kfifo header rework from Andy Shevchenko in the series "kfifo: Clean up kfifo.h". - GDB script fixes from Florian Rommel in the series "scripts/gdb: Fixes for $lx_current and $lx_per_cpu". - After much discussion, a coding-style update from Barry Song explaining one reason why inline functions are preferred over macros. The series is "codingstyle: avoid unused parameters for a function-like macro"" * tag 'mm-nonmm-stable-2024-05-19-11-56' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (62 commits) fs/proc: fix softlockup in __read_vmcore nilfs2: convert BUG_ON() in nilfs_finish_roll_forward() to WARN_ON() scripts: checkpatch: check unused parameters for function-like macro Documentation: coding-style: ask function-like macros to evaluate parameters nilfs2: use __field_struct() for a bitwise field selftests/kcmp: remove unused open mode nilfs2: remove calls to folio_set_error() and folio_clear_error() kernel/watchdog_perf.c: tidy up kerneldoc watchdog: allow nmi watchdog to use raw perf event watchdog: handle comma separated nmi_watchdog command line nilfs2: make superblock data array index computation sparse friendly squashfs: remove calls to set the folio error flag squashfs: convert squashfs_symlink_read_folio to use folio APIs scripts/gdb: fix detection of current CPU in KGDB scripts/gdb: make get_thread_info accept pointers scripts/gdb: fix parameter handling in $lx_per_cpu scripts/gdb: fix failing KGDB detection during probe kfifo: don't use "proxy" headers media: stih-cec: add missing io.h media: rc: add missing io.h ... 
Pull non-mm updates from Andrew Morton:
 "Mainly singleton patches, documented in their respective changelogs.
  Notable series include:

   - Some maintenance and performance work for ocfs2 in Heming Zhao's
     series "improve write IO performance when fragmentation is high".

   - Some ocfs2 bugfixes from Su Yue in the series "ocfs2 bugs fixes
     exposed by fstests".

   - kfifo header rework from Andy Shevchenko in the series "kfifo:
     Clean up kfifo.h".

   - GDB script fixes from Florian Rommel in the series "scripts/gdb:
     Fixes for $lx_current and $lx_per_cpu".

   - After much discussion, a coding-style update from Barry Song
     explaining one reason why inline functions are preferred over
     macros. The series is "codingstyle: avoid unused parameters for a
     function-like macro""

* tag 'mm-nonmm-stable-2024-05-19-11-56' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (62 commits)
  fs/proc: fix softlockup in __read_vmcore
  nilfs2: convert BUG_ON() in nilfs_finish_roll_forward() to WARN_ON()
  scripts: checkpatch: check unused parameters for function-like macro
  Documentation: coding-style: ask function-like macros to evaluate parameters
  nilfs2: use __field_struct() for a bitwise field
  selftests/kcmp: remove unused open mode
  nilfs2: remove calls to folio_set_error() and folio_clear_error()
  kernel/watchdog_perf.c: tidy up kerneldoc
  watchdog: allow nmi watchdog to use raw perf event
  watchdog: handle comma separated nmi_watchdog command line
  nilfs2: make superblock data array index computation sparse friendly
  squashfs: remove calls to set the folio error flag
  squashfs: convert squashfs_symlink_read_folio to use folio APIs
  scripts/gdb: fix detection of current CPU in KGDB
  scripts/gdb: make get_thread_info accept pointers
  scripts/gdb: fix parameter handling in $lx_per_cpu
  scripts/gdb: fix failing KGDB detection during probe
  kfifo: don't use "proxy" headers
  media: stih-cec: add missing io.h
  media: rc: add missing io.h
  ...
Merge tag 'linux_kselftest-next-6.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest 2024-05-14T18:36:54+00:00 Linus Torvalds torvalds@linux-foundation.org 2024-05-14T18:36:54+00:00 4b95dc87362aa57bdd0dcbad109ca5e5ef3cbb6c Pull kselftest updates from Shuah Khan: - make framework and tests reporting KTAP compliant - make ktap_helpers and power_supply test POSIX compliant - add ksft_exit_fail_perror() to include errono in string form - avoid clang reporting false positive static analysis errors about functions that exit and never return. ksft_exit* functions are marked __noreturn to address this problem - add mechanism for reporting a KSFT_ result code - fix build warnings related missing headers and unused variables - fix clang build failures - cleanups to resctrl test - add host arch for LLVM builds * tag 'linux_kselftest-next-6.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest: (44 commits) selftests/sgx: Include KHDR_INCLUDES in Makefile selftests: Compile kselftest headers with -D_GNU_SOURCE selftests/resctrl: fix clang build warnings related to abs(), labs() calls selftests/ftrace: Fix checkbashisms errors selftests/ftrace: Fix BTFARG testcase to check fprobe is enabled correctly selftests/capabilities: fix warn_unused_result build warnings selftests: filesystems: add missing stddef header selftests: kselftest_deps: fix l5_test() empty variable selftests: default to host arch for LLVM builds selftests/resctrl: fix clang build failure: use LOCAL_HDRS selftests/binderfs: use the Makefile's rules, not Make's implicit rules Documentation: kselftest: fix codeblock selftests: kselftest: Make ksft_exit functions return void instead of int selftests: x86: ksft_exit_pass() does not return selftests: timers: ksft_exit functions do not return selftests: sync: ksft_exit_pass() does not return selftests/resctrl: ksft_exit_skip() does not return selftests: pidfd: ksft_exit functions do not return selftests/mm: ksft_exit functions do not return selftests: membarrier: ksft_exit_pass() does not return ... 
Pull kselftest updates from Shuah Khan:

 - make framework and tests reporting KTAP compliant

 - make ktap_helpers and power_supply test POSIX compliant

 - add ksft_exit_fail_perror() to include errono in string form

 - avoid clang reporting false positive static analysis errors about
   functions that exit and never return. ksft_exit* functions are marked
   __noreturn to address this problem

 - add mechanism for reporting a KSFT_ result code

 - fix build warnings related missing headers and unused variables

 - fix clang build failures

 - cleanups to resctrl test

 - add host arch for LLVM builds

* tag 'linux_kselftest-next-6.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest: (44 commits)
  selftests/sgx: Include KHDR_INCLUDES in Makefile
  selftests: Compile kselftest headers with -D_GNU_SOURCE
  selftests/resctrl: fix clang build warnings related to abs(), labs() calls
  selftests/ftrace: Fix checkbashisms errors
  selftests/ftrace: Fix BTFARG testcase to check fprobe is enabled correctly
  selftests/capabilities: fix warn_unused_result build warnings
  selftests: filesystems: add missing stddef header
  selftests: kselftest_deps: fix l5_test() empty variable
  selftests: default to host arch for LLVM builds
  selftests/resctrl: fix clang build failure: use LOCAL_HDRS
  selftests/binderfs: use the Makefile's rules, not Make's implicit rules
  Documentation: kselftest: fix codeblock
  selftests: kselftest: Make ksft_exit functions return void instead of int
  selftests: x86: ksft_exit_pass() does not return
  selftests: timers: ksft_exit functions do not return
  selftests: sync: ksft_exit_pass() does not return
  selftests/resctrl: ksft_exit_skip() does not return
  selftests: pidfd: ksft_exit functions do not return
  selftests/mm: ksft_exit functions do not return
  selftests: membarrier: ksft_exit_pass() does not return
  ...
Merge tag 'kcsan.2024.05.10a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu 2024-05-13T17:13:39+00:00 Linus Torvalds torvalds@linux-foundation.org 2024-05-13T17:13:39+00:00 c07ea940a011343fdaec12cd74b4ff947ba6f893 Pull kcsan update from Paul McKenney: "Introduce __data_racy type qualifier This adds a __data_racy type qualifier that enables kernel developers to inform KCSAN that a given variable is a shared variable without needing to mark each and every access. This allows pre-KCSAN code to be correctly (if approximately) instrumented withh very little effort, and also provides people reading the code a clear indication that the variable is in fact shared. In addition, it permits incremental transition to per-access KCSAN marking, so that (for example) a given subsystem can be transitioned one variable at a time, while avoiding large numbers of KCSAN warnings during this transition" * tag 'kcsan.2024.05.10a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu: kcsan, compiler_types: Introduce __data_racy type qualifier 
Pull kcsan update from Paul McKenney:
 "Introduce __data_racy type qualifier

  This adds a __data_racy type qualifier that enables kernel developers
  to inform KCSAN that a given variable is a shared variable without
  needing to mark each and every access.

  This allows pre-KCSAN code to be correctly (if approximately)
  instrumented withh very little effort, and also provides people
  reading the code a clear indication that the variable is in fact
  shared.

  In addition, it permits incremental transition to per-access KCSAN
  marking, so that (for example) a given subsystem can be transitioned
  one variable at a time, while avoiding large numbers of KCSAN warnings
  during this transition"

* tag 'kcsan.2024.05.10a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu:
  kcsan, compiler_types: Introduce __data_racy type qualifier