kernel/linux.git/tools/mm, branch v6.12.96

tools/mm/slabinfo: fix total_objects attribute name

2026-07-18T14:52:07+00:00

commit 892a7864730775c3dbee2a39e9ead4fa8d4256e7 upstream. SLUB exports the total_objects sysfs attribute, but slabinfo tries to read objects_total. As a result, the lookup fails and the field remains zero. Use the correct attribute name and rename the corresponding structure member to match. Fixes: 205ab99dd103 ("slub: Update statistics handling for variable order slabs") Signed-off-by: Yichong Chen Cc: Reviewed-by: SeongJae Park Link: https://patch.msgid.link/96556748872BB47E+20260612071359.649946-1-chenyichong@uniontech.com Signed-off-by: Vlastimil Babka (SUSE) Signed-off-by: Greg Kroah-Hartman

tools/mm/slabinfo: Fix trace disable logic inversion

2026-07-18T14:52:07+00:00

commit 235ab68d67eadbef1fdbfb771f21f5bacc77a2ae upstream. The disable trace path in slab_debug() had a logic error where it would set trace=1 instead of trace=0. This made trace functionality permanently enabled once turned on for any slab cache. Fixes: a87615b8f9e2 ("SLUB: slabinfo upgrade") Cc: stable@vger.kernel.org Reviewed-by: SeongJae Park Signed-off-by: Xuewen Wang WARNING: From:/Signed-off-by: email address mismatch: 'From: wangxuewen <18810879172@163.com>' != 'Signed-off-by: wangxuewen ' Link: https://patch.msgid.link/20260518062159.80664-2-wangxuewen@kylinos.cn Signed-off-by: Vlastimil Babka (SUSE) Signed-off-by: Greg Kroah-Hartman

tools/mm/page_owner_sort: fix timestamp comparison for stable sorting

2026-01-08T09:14:50+00:00

commit 7013803444dd3bbbe28fd3360c084cec3057c554 upstream. The ternary operator in compare_ts() returns 1 when timestamps are equal, causing unstable sorting behavior. Replace with explicit three-way comparison that returns 0 for equal timestamps, ensuring stable qsort ordering and consistent output. Link: https://lkml.kernel.org/r/20251209044552.3396468-1-kaushlendra.kumar@intel.com Fixes: 8f9c447e2e2b ("tools/vm/page_owner_sort.c: support sorting pid and time") Signed-off-by: Kaushlendra Kumar Cc: Chongxi Zhao Cc: Signed-off-by: Andrew Morton Signed-off-by: Greg Kroah-Hartman

tools/mm: fix compile error

2024-11-15T06:43:48+00:00

Add a missing semicolon. Link: https://lkml.kernel.org/r/20241112171655.1662670-1-motiejus@jakstys.lt Fixes: ece5897e5a10 ("tools/mm: -Werror fixes in page-types/slabinfo") Signed-off-by: Motiejus JakÅ`tys Closes: https://github.com/NixOS/nixpkgs/issues/355369 Reviewed-by: SeongJae Park Reviewed-by: Vishal Moola (Oracle) Acked-by: Oleksandr Natalenko Cc: Wladislav Wiebe Signed-off-by: Andrew Morton

tools/mm: -Werror fixes in page-types/slabinfo

2024-10-31T03:14:11+00:00

Commit e6d2c436ff693 ("tools/mm: allow users to provide additional cflags/ldflags") passes now CFLAGS to Makefile. With this, build systems with default -Werror enabled found: slabinfo.c:1300:25: error: ignoring return value of 'chdir' declared with attribute 'warn_unused_result' [-Werror=unused-result] chdir(".."); ^~~~~~~~~~~ page-types.c:397:35: error: format '%lu' expects argument of type 'long unsigned int', but argument 2 has type 'uint64_t' {aka 'long long unsigned int'} [-Werror=format=] printf("%lu\t", mapcnt0); ~~^ ~~~~~~~ .. Fix page-types by using PRIu64 for uint64_t prints and check in slabinfo for return code on chdir(".."). Link: https://lkml.kernel.org/r/c1ceb507-94bc-461c-934d-c19b77edd825@gmail.com Fixes: e6d2c436ff69 ("tools/mm: allow users to provide additional cflags/ldflags") Signed-off-by: Wladislav Wiebe Cc: Vlastimil Babka Cc: Herton R. Krzesinski Cc: Signed-off-by: Andrew Morton

Merge tag 'mm-nonmm-stable-2024-09-21-07-52' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

2024-09-21T15:20:50+00:00

Pull non-MM updates from Andrew Morton: "Many singleton patches - please see the various changelogs for details. Quite a lot of nilfs2 work this time around. Notable patch series in this pull request are: - "mul_u64_u64_div_u64: new implementation" by Nicolas Pitre, with assistance from Uwe Kleine-König. Reimplement mul_u64_u64_div_u64() to provide (much) more accurate results. The current implementation was causing Uwe some issues in the PWM drivers. - "xz: Updates to license, filters, and compression options" from Lasse Collin. Miscellaneous maintenance and kinor feature work to the xz decompressor. - "Fix some GDB command error and add some GDB commands" from Kuan-Ying Lee. Fixes and enhancements to the gdb scripts. - "treewide: add missing MODULE_DESCRIPTION() macros" from Jeff Johnson. Adds lots of MODULE_DESCRIPTIONs, thus fixing lots of warnings about this. - "nilfs2: add support for some common ioctls" from Ryusuke Konishi. Adds various commonly-available ioctls to nilfs2. - "This series fixes a number of formatting issues in kernel doc comments" from Ryusuke Konishi does that. - "nilfs2: prevent unexpected ENOENT propagation" from Ryusuke Konishi. Fix issues where -ENOENT was being unintentionally and inappropriately returned to userspace. - "nilfs2: assorted cleanups" from Huang Xiaojia. - "nilfs2: fix potential issues with empty b-tree nodes" from Ryusuke Konishi fixes some issues which can occur on corrupted nilfs2 filesystems. - "scripts/decode_stacktrace.sh: improve error reporting and usability" from Luca Ceresoli does those things" * tag 'mm-nonmm-stable-2024-09-21-07-52' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (103 commits) list: test: increase coverage of list_test_list_replace*() list: test: fix tests for list_cut_position() proc: use __auto_type more treewide: correct the typo 'retun' ocfs2: cleanup return value and mlog in ocfs2_global_read_info() nilfs2: remove duplicate 'unlikely()' usage nilfs2: fix potential oob read in nilfs_btree_check_delete() nilfs2: determine empty node blocks as corrupted nilfs2: fix potential null-ptr-deref in nilfs_btree_insert() user_namespace: use kmemdup_array() instead of kmemdup() for multiple allocation tools/mm: rm thp_swap_allocator_test when make clean squashfs: fix percpu address space issues in decompressor_multi_percpu.c lib: glob.c: added null check for character class nilfs2: refactor nilfs_segctor_thread() nilfs2: use kthread_create and kthread_stop for the log writer thread nilfs2: remove sc_timer_task nilfs2: do not repair reserved inode bitmap in nilfs_new_inode() nilfs2: eliminate the shared counter and spinlock for i_generation nilfs2: separate inode type information from i_state field nilfs2: use the BITS_PER_LONG macro ...

tools/mm: rm thp_swap_allocator_test when make clean

2024-09-09T23:47:41+00:00

rm thp_swap_allocator_test when make clean Link: https://lkml.kernel.org/r/20240829042008.6937-1-zhangjiao2@cmss.chinamobile.com Signed-off-by: zhangjiao Signed-off-by: Andrew Morton

x86: remove PG_uncached

2024-09-04T04:15:46+00:00

Convert x86 to use PG_arch_2 instead of PG_uncached and remove PG_uncached. Link: https://lkml.kernel.org/r/20240821193445.2294269-11-willy@infradead.org Signed-off-by: Matthew Wilcox (Oracle) Signed-off-by: Andrew Morton

mm: rename PG_mappedtodisk to PG_owner_2

2024-09-04T04:15:45+00:00

This flag has similar constraints to PG_owner_priv_1 -- it is ignored by core code, and is entirely for the use of the code which allocated the folio. Since the pagecache does not use it, individual filesystems can use it. The bufferhead code does use it, so filesystems which use the buffer cache must not use it for another purpose. Link: https://lkml.kernel.org/r/20240821193445.2294269-10-willy@infradead.org Signed-off-by: Matthew Wilcox (Oracle) Signed-off-by: Andrew Morton

tools/mm: introduce a tool to assess swap entry allocation for thp_swapout

2024-07-10T19:14:51+00:00

Both Ryan and Chris have been utilizing the small test program to aid in debugging and identifying issues with swap entry allocation. While a real or intricate workload might be more suitable for assessing the correctness and effectiveness of the swap allocation policy, a small test program presents a simpler means of understanding the problem and initially verifying the improvements being made. Let's endeavor to integrate it into tools/mm. Although it presently only accommodates 64KB and 4KB, I'm optimistic that we can expand its capabilities to support multiple sizes and simulate more complex systems in the future as required. Basically, we have 1. Use MADV_PAGEPUT for rapid swap-out, putting the swap allocation code under high exercise in a short time. 2. Use MADV_DONTNEED to simulate the behavior of libc and Java heap in freeing memory, as well as for munmap, app exits, or OOM killer scenarios. This ensures new mTHP is always generated, released or swapped out, similar to the behavior on a PC or Android phone where many applications are frequently started and terminated. 3. Swap in with or without the "-a" option to observe how fragments due to swap-in and the incoming swap-in of large folios will impact swap-out fallback. Due to 2, we ensure a certain proportion of mTHP. Similarly, because of 3, we maintain a certain proportion of small folios, as we don't support large folios swap-in, meaning any swap-in will immediately result in small folios. Therefore, with both 2 and 3, we automatically achieve a system containing both mTHP and small folios. Additionally, 1 provides the ability to continuously swap them out. We can also use "-s" to add a dedicated small folios memory area. [akpm@linux-foundation.org: thp_swap_allocator_test.c needs mman.h, per Kairui Song] Link: https://lkml.kernel.org/r/20240622071231.576056-2-21cnbao@gmail.com Signed-off-by: Barry Song Acked-by: Chris Li Tested-by: Chris Li Reviewed-by: Ryan Roberts Tested-by: Ryan Roberts Cc: David Hildenbrand Cc: "Huang, Ying" Cc: Hugh Dickins Cc: Kairui Song Cc: Kalesh Singh Signed-off-by: Andrew Morton