From: Miles Chen <miles.chen@xxxxxxxxxxxx>
Subject: slub: remove obsolete comments of put_cpu_partial()
d6e0b7fa1186 ("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/1516968550-1520-1-git-send-email-miles.chen@xxxxxxxxxxxx
Signed-off-by: Miles Chen <miles.chen@xxxxxxxxxxxx>
Reviewed-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Christoph Lameter <cl@xxxxxxxxx>
Cc: Pekka Enberg <penberg@xxxxxxxxxx>
Cc: David Rientjes <rientjes@xxxxxxxxxx>
Cc: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx>
Cc: Vladimir Davydov <vdavydov.dev@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/slub.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
diff -puN mm/slub.c~slub-remove-obsolete-comments-of-put_cpu_partial mm/slub.c
--- a/mm/slub.c~slub-remove-obsolete-comments-of-put_cpu_partial
+++ a/mm/slub.c
@@ -2222,9 +2222,7 @@ static void unfreeze_partials(struct kme
/*
* 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.
_
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