From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail144.messagelabs.com (mail144.messagelabs.com [216.82.254.51]) by kanga.kvack.org (Postfix) with ESMTP id A85A36B006A for ; Sun, 10 Oct 2010 02:50:56 -0400 (EDT) From: Andi Kleen Subject: Re: Results of my VFS scaling evaluation. References: <1286580739.3153.57.camel@bobble.smo.corp.google.com> Date: Sun, 10 Oct 2010 08:50:49 +0200 In-Reply-To: <1286580739.3153.57.camel@bobble.smo.corp.google.com> (Frank Mayhar's message of "Fri, 08 Oct 2010 16:32:19 -0700") Message-ID: <8739seh77a.fsf@basil.nowhere.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: owner-linux-mm@kvack.org To: Frank Mayhar Cc: linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, mrubin@google.com List-ID: Frank Mayhar writes: > Nick Piggin has been doing work on lock contention in VFS, in particular > to remove the dcache and inode locks, and we are very interested in this > work. He has entirely eliminated two of the most contended locks, > replacing them with a combination of more granular locking, seqlocks, > RCU lists and other mechanisms that reduce locking and contention in > general. He has published this work at > > git://git.kernel.org/pub/scm/linux/kernel/git/npiggin/linux-npiggin.git > > As we have run into problems with lock contention, Google is very > interested in these improvements. Thanks Frank for the data. Yes publication of any profiles would be interesting. We're also seeing major issues with dcache and inode locks in local testing. -Andi -- ak@linux.intel.com -- Speaking for myself only. -- 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