Commit cc2e9d2b authored by David Rientjes's avatar David Rientjes Committed by Vlastimil Babka
Browse files

mm, slab: periodically resched in drain_freelist() 



drain_freelist() can be called with a very large number of slabs to free,
such as for kmem_cache_shrink(), or depending on various settings of the
slab cache when doing periodic reaping.

If there is a potentially long list of slabs to drain, periodically
schedule to ensure we aren't saturating the cpu for too long.

Signed-off-by: default avatarDavid Rientjes <rientjes@google.com>
Reviewed-by: default avatarHyeonggon Yoo <42.hyeyoo@gmail.com>
Signed-off-by: default avatarVlastimil Babka <vbabka@suse.cz>
parent 88603b6d

mm/slab.c

+2 −0
Original line number Diff line number Diff line
@@ -2211,6 +2211,8 @@ static int drain_freelist(struct kmem_cache *cache, 
		raw_spin_unlock_irq(&n->list_lock);

		slab_destroy(cache, slab);

		nr_freed++;



		cond_resched();

	}

out:

	return nr_freed;