From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx103.postini.com [74.125.245.103]) by kanga.kvack.org (Postfix) with SMTP id 106916B007B for ; Fri, 19 Oct 2012 15:47:53 -0400 (EDT) Date: Fri, 19 Oct 2012 19:47:51 +0000 From: Christoph Lameter Subject: Re: [PATCH v5 14/18] memcg/sl[au]b: shrink dead caches In-Reply-To: <1350656442-1523-15-git-send-email-glommer@parallels.com> Message-ID: <0000013a7a9144d1-de184c46-2a7d-4e6c-8606-927cc1f48969-000000@email.amazonses.com> References: <1350656442-1523-1-git-send-email-glommer@parallels.com> <1350656442-1523-15-git-send-email-glommer@parallels.com> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org List-ID: To: Glauber Costa Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, cgroups@vger.kernel.org, Mel Gorman , Tejun Heo , Andrew Morton , Michal Hocko , Johannes Weiner , kamezawa.hiroyu@jp.fujitsu.com, David Rientjes , Pekka Enberg , devel@openvz.org, Pekka Enberg , Suleiman Souhlal On Fri, 19 Oct 2012, Glauber Costa wrote: > An unlikely branch is used to make sure this case does not affect > performance in the usual slab_free path. > > The slab allocator has a time based reaper that would eventually get rid > of the objects, but we can also call it explicitly, since dead caches > are not a likely event. This is also something that could be done from slab_common since all allocators have kmem_cache_shrink and kmem_cache_shrink can be used to drain the caches and free up empty slab pages. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org