From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail203.messagelabs.com (mail203.messagelabs.com [216.82.254.243]) by kanga.kvack.org (Postfix) with SMTP id 70AB96B0025 for ; Fri, 6 May 2011 13:28:02 -0400 (EDT) Message-ID: <4DC42644.5020500@redhat.com> Date: Fri, 06 May 2011 12:48:04 -0400 From: Rik van Riel MIME-Version: 1.0 Subject: Re: [PATCH 3/4] VM/RMAP: Batch anon_vma_unlink in exit References: <1304623972-9159-1-git-send-email-andi@firstfloor.org> <1304623972-9159-4-git-send-email-andi@firstfloor.org> In-Reply-To: <1304623972-9159-4-git-send-email-andi@firstfloor.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Andi Kleen Cc: linux-mm@kvack.org, Andrea Arcangeli , tim.c.chen@linux.intel.com, torvalds@linux-foundation.org, lwoodman@redhat.com, mel@csn.ul.ie, Andi Kleen On 05/05/2011 03:32 PM, Andi Kleen wrote: > From: Andi Kleen > > Apply the rmap chain lock batching to anon_vma_unlink() too. > This speeds up exit() on process chains with many processes, > when there is a lot of sharing. > > Unfortunately this doesn't fix all lock contention -- file vmas > have a mapping lock that is also a problem. And even existing > anon_vmas still contend. But it's better than before. > > Signed-off-by: Andi Kleen Reviewed-by: Rik van Riel -- All rights reversed -- 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/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: email@kvack.org