summaryrefslogtreecommitdiff
path: root/mm
diff options
context:
space:
mode:
authorVlastimil Babka <vbabka@suse.cz>2021-06-08 02:19:03 +0300
committerVlastimil Babka <vbabka@suse.cz>2021-09-04 00:56:49 +0300
commit976b805c782a57256e08aeaab45a64536b8887cf (patch)
tree2ade9eace717c8c2dbe45e88b8d0c985e3efc9d5 /mm
parent84048039d7774c363951ee6fc41c5d26f50f72fd (diff)
downloadlinux-976b805c782a57256e08aeaab45a64536b8887cf.tar.xz
mm, slub: remove redundant unfreeze_partials() from put_cpu_partial()
Commit d6e0b7fa1186 ("slub: make dead caches discard free slabs immediately") introduced cpu partial flushing for kmemcg caches, based on setting the target cpu_partial to 0 and adding a flushing check in put_cpu_partial(). This code that sets cpu_partial to 0 was later moved by c9fc586403e7 ("slab: introduce __kmemcg_cache_deactivate()") and ultimately removed by 9855609bde03 ("mm: memcg/slab: use a single set of kmem_caches for all accounted allocations"). However the check and flush in put_cpu_partial() was never removed, although it's effectively a dead code. So this patch removes it. Note that d6e0b7fa1186 also added preempt_disable()/enable() to unfreeze_partials() which could be thus also considered unnecessary. But further patches will rely on it, so keep it. Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Diffstat (limited to 'mm')
-rw-r--r--mm/slub.c7
1 files changed, 0 insertions, 7 deletions
diff --git a/mm/slub.c b/mm/slub.c
index fee093db2bfd..79e53303844c 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -2466,13 +2466,6 @@ static void put_cpu_partial(struct kmem_cache *s, struct page *page, int drain)
} while (this_cpu_cmpxchg(s->cpu_slab->partial, oldpage, page)
!= oldpage);
- if (unlikely(!slub_cpu_partial(s))) {
- unsigned long flags;
-
- local_irq_save(flags);
- unfreeze_partials(s, this_cpu_ptr(s->cpu_slab));
- local_irq_restore(flags);
- }
preempt_enable();
#endif /* CONFIG_SLUB_CPU_PARTIAL */
}