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| author | Jann Horn <[email protected]> | 2020-03-17 00:28:45 +0000 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2020-03-18 16:21:51 +0000 |
| commit | fd4d9c7d0c71866ec0c2825189ebd2ce35bd95b8 (patch) | |
| tree | 5cee56264d8299427ddebfc0b394f6b4a8f0bcb9 /tools/perf/scripts/python/net_dropmonitor.py | |
| parent | Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/hid... (diff) | |
| download | kernel-fd4d9c7d0c71866ec0c2825189ebd2ce35bd95b8.tar.gz kernel-fd4d9c7d0c71866ec0c2825189ebd2ce35bd95b8.zip | |
mm: slub: add missing TID bump in kmem_cache_alloc_bulk()
When kmem_cache_alloc_bulk() attempts to allocate N objects from a percpu
freelist of length M, and N > M > 0, it will first remove the M elements
from the percpu freelist, then call ___slab_alloc() to allocate the next
element and repopulate the percpu freelist. ___slab_alloc() can re-enable
IRQs via allocate_slab(), so the TID must be bumped before ___slab_alloc()
to properly commit the freelist head change.
Fix it by unconditionally bumping c->tid when entering the slowpath.
Cc: [email protected]
Fixes: ebe909e0fdb3 ("slub: improve bulk alloc strategy")
Signed-off-by: Jann Horn <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/net_dropmonitor.py')
0 files changed, 0 insertions, 0 deletions