From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx130.postini.com [74.125.245.130]) by kanga.kvack.org (Postfix) with SMTP id A42FD6B0088 for ; Thu, 1 Nov 2012 08:09:12 -0400 (EDT) From: Glauber Costa Subject: [PATCH v6 29/29] Add slab-specific documentation about the kmem controller Date: Thu, 1 Nov 2012 16:07:45 +0400 Message-Id: <1351771665-11076-30-git-send-email-glommer@parallels.com> In-Reply-To: <1351771665-11076-1-git-send-email-glommer@parallels.com> References: <1351771665-11076-1-git-send-email-glommer@parallels.com> Sender: owner-linux-mm@kvack.org List-ID: To: linux-mm@kvack.org Cc: linux-kernel@vger.kernel.org, Andrew Morton , kamezawa.hiroyu@jp.fujitsu.com, Johannes Weiner , Tejun Heo , Michal Hocko , Christoph Lameter , Pekka Enberg , David Rientjes , Glauber Costa , Pekka Enberg , Suleiman Souhlal Signed-off-by: Glauber Costa CC: Christoph Lameter CC: Pekka Enberg CC: Michal Hocko CC: Kamezawa Hiroyuki CC: Johannes Weiner CC: Suleiman Souhlal CC: Tejun Heo --- Documentation/cgroups/memory.txt | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/Documentation/cgroups/memory.txt b/Documentation/cgroups/memory.txt index 206853b..9d9938d 100644 --- a/Documentation/cgroups/memory.txt +++ b/Documentation/cgroups/memory.txt @@ -301,6 +301,13 @@ to trigger slab reclaim when those limits are reached. kernel memory, we prevent new processes from being created when the kernel memory usage is too high. +* slab pages: pages allocated by the SLAB or SLUB allocator are tracked. A copy +of each kmem_cache is created everytime the cache is touched by the first time +from inside the memcg. The creation is done lazily, so some objects can still be +skipped while the cache is being created. All objects in a slab page should +belong to the same memcg. This only fails to hold when a task is migrated to a +different memcg during the page allocation by the cache. + * sockets memory pressure: some sockets protocols have memory pressure thresholds. The Memory Controller allows them to be controlled individually per cgroup, instead of globally. -- 1.7.11.7 -- 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