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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2022-04-27 13:44:37 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2022-04-27 13:44:37 -0700 |
| commit | 8f4dd16603ce834d1c5c4da67803ea82dd282511 (patch) | |
| tree | aa5b094677a6f6078bd3b00ab3685589616039d4 | |
| parent | e4d8a29997731b3bb14059024b24df9f784288d0 (diff) | |
| parent | 5603f9bdea68406f54132125b6fdddeeb5c0d2e4 (diff) | |
| download | linux-8f4dd16603ce834d1c5c4da67803ea82dd282511.tar.bz2 | |
Merge branch 'akpm' (patches from Andrew)
Merge fixes from Andrew Morton:
"Two patches.
Subsystems affected by this patch series: mm/kasan and mm/debug"
* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
docs: vm/page_owner: use literal blocks for param description
kasan: prevent cpu_quarantine corruption when CPU offline and cache shrink occur at same time
| -rw-r--r-- | Documentation/vm/page_owner.rst | 5 | ||||
| -rw-r--r-- | mm/kasan/quarantine.c | 7 |
2 files changed, 10 insertions, 2 deletions
diff --git a/Documentation/vm/page_owner.rst b/Documentation/vm/page_owner.rst index 65204d7f004f..7e0c3f574e78 100644 --- a/Documentation/vm/page_owner.rst +++ b/Documentation/vm/page_owner.rst @@ -110,7 +110,7 @@ Usage If you want to sort by the page nums of buf, use the ``-m`` parameter. The detailed parameters are: - fundamental function: + fundamental function:: Sort: -a Sort by memory allocation time. @@ -122,7 +122,7 @@ Usage -s Sort by stack trace. -t Sort by times (default). - additional function: + additional function:: Cull: --cull <rules> @@ -153,6 +153,7 @@ Usage STANDARD FORMAT SPECIFIERS ========================== +:: KEY LONG DESCRIPTION p pid process ID diff --git a/mm/kasan/quarantine.c b/mm/kasan/quarantine.c index 08291ed33e93..0a9def8ce5e8 100644 --- a/mm/kasan/quarantine.c +++ b/mm/kasan/quarantine.c @@ -315,6 +315,13 @@ static void per_cpu_remove_cache(void *arg) struct qlist_head *q; q = this_cpu_ptr(&cpu_quarantine); + /* + * Ensure the ordering between the writing to q->offline and + * per_cpu_remove_cache. Prevent cpu_quarantine from being corrupted + * by interrupt. + */ + if (READ_ONCE(q->offline)) + return; qlist_move_cache(q, &to_free, cache); qlist_free_all(&to_free, cache); } |