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slub: remove obsolete comments of put_cpu_partial()

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Commit d6e0b7fa11 ("slub: make dead caches discard free slabs
immediately") makes put_cpu_partial() run with preemption disabled and
interrupts disabled when calling unfreeze_partials().

The comment: "put_cpu_partial() is done without interrupts disabled and
without preemption disabled" looks obsolete, so remove it.

Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Miles Chen <[email protected]>
Reviewed-by: Andrew Morton <[email protected]>
Cc: Christoph Lameter <[email protected]>
Cc: Pekka Enberg <[email protected]>
Cc: David Rientjes <[email protected]>
Cc: Joonsoo Kim <[email protected]>
Cc: Vladimir Davydov <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Miles Chen 2018-01-31 16:15:47 -08:00 • committed by Linus Torvalds
commit 0d2d5d40de
1 changed files with 1 additions and 3 deletions
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4
mm/slub.c
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@ -2222,9 +2222,7 @@ static void unfreeze_partials(struct kmem_cache *s,
/*
* Put a page that was just frozen (in __slab_free) into a partial page
* slot if available. This is done without interrupts disabled and without
* preemption disabled. The cmpxchg is racy and may put the partial page
* onto a random cpus partial slot.
* slot if available.
*
* If we did not find a slot then simply move all the partials to the
* per node partial list.