kernel.git/tools/mm/page_owner_sort.c, branch master

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

2025-12-23T19:23:14Z

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

tools/mm/page_owner_sort: add help option support

2025-11-17T01:28:06Z

Add -h/--help option to display usage information and improve code style. Link: https://lkml.kernel.org/r/20251016054927.138510-1-ye.liu@linux.dev Signed-off-by: Ye Liu Cc: SeongJae Park Signed-off-by: Andrew Morton

tools/mm: use in page_owner_sort.c

2025-11-17T01:28:05Z

Use standard instead of manually defining bool, true and false. Link: https://lkml.kernel.org/r/20251015093851.109663-1-ye.liu@linux.dev Signed-off-by: Ye Liu Reviewed-by: Dev Jain Reviewed-by: SeongJae Park Signed-off-by: Andrew Morton

tools/mm: free the allocated memory

2024-11-07T04:11:17Z

The comm_str memory needs to be freed if the search_pattern function call fails in get_comm [akpm@linux-foundation.org: fix whitespace] Link: https://lkml.kernel.org/r/20241022012526.7597-1-liujing@cmss.chinamobile.com Signed-off-by: Liu Jing Signed-off-by: Andrew Morton

tools/mm: update the usage output to be more organized

2023-10-18T21:34:19Z

Organize the usage options alphabetically and improve the description of some options. Also separate the more complicated cull options from the single use compare options. Link: https://lkml.kernel.org/r/20231013190350.579407-6-audra@redhat.com Signed-off-by: Audra Mitchell Acked-by: Rafael Aquini Acked-by: Vlastimil Babka Cc: Georgi Djakov Signed-off-by: Andrew Morton

tools/mm: fix the default case for page_owner_sort

2023-10-18T21:34:19Z

With the additional commands and timestamps added to the tool, the default case (-t) has been broken. Now that the allocation timestamps are saved outside of the txt field, allow us to properly sort the data by number of times the record has been seen. Furthermore prevent the misuse of the commandline arguments so only one compare option can be used. Link: https://lkml.kernel.org/r/20231013190350.579407-5-audra@redhat.com Signed-off-by: Audra Mitchell Acked-by: Rafael Aquini Acked-by: Vlastimil Babka Cc: Georgi Djakov Signed-off-by: Andrew Morton

tools/mm: filter out timestamps for correct collation

2023-10-18T21:34:19Z

With the introduction of allocation timestamps being included in page_owner output, each record becomes unique due to the timestamp nanosecond granularity. Remove the check in add_list that tries to collate each record during processing as the memcmp() is just additional overhead at this point. Also keep the allocation timestamps, but allow collation to occur without consideration of the allocation timestamp except in the case were allocation timestamps are requested by the user (the -a option). Link: https://lkml.kernel.org/r/20231013190350.579407-4-audra@redhat.com Signed-off-by: Audra Mitchell Acked-by: Rafael Aquini Acked-by: Vlastimil Babka Cc: Georgi Djakov Signed-off-by: Andrew Morton

tools/mm: remove references to free_ts from page_owner_sort

2023-10-18T21:34:19Z

With the removal of free timestamps from page_owner output, we no longer need to handle this case or the "unreleased" case. Remove all references to both cases. Link: https://lkml.kernel.org/r/20231013190350.579407-3-audra@redhat.com Signed-off-by: Audra Mitchell Acked-by: Rafael Aquini Reviewed-by: Vlastimil Babka Cc: Georgi Djakov Signed-off-by: Andrew Morton

tools/mm/page_owner_sort.c: fix TGID output when cull=tg is used

2023-04-16T17:41:25Z

When using cull option with 'tg' flag, the fprintf is using pid instead of tgid. It should use tgid instead. Link: https://lkml.kernel.org/r/20230411034929.2071501-1-steve_chou@pesi.com.tw Fixes: 9c8a0a8e599f4a ("tools/vm/page_owner_sort.c: support for user-defined culling rules") Signed-off-by: Steve Chou Cc: Jiajian Ye Cc: Signed-off-by: Andrew Morton

tools/vm: rename tools/vm to tools/mm

2023-01-19T01:12:55Z

Rename tools/vm to tools/mm for being more consistent with the code and documentation directories, and won't be confused with virtual machines. Link: https://lkml.kernel.org/r/20230103180754.129637-4-sj@kernel.org Signed-off-by: SeongJae Park Cc: Jonathan Corbet Cc: Shuah Khan Signed-off-by: Andrew Morton