From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx105.postini.com [74.125.245.105]) by kanga.kvack.org (Postfix) with SMTP id EBABF6B010B for ; Thu, 23 Feb 2012 09:02:03 -0500 (EST) Received: by bkty12 with SMTP id y12so1381206bkt.14 for ; Thu, 23 Feb 2012 06:02:02 -0800 (PST) Message-ID: <4F4646D6.6070900@openvz.org> Date: Thu, 23 Feb 2012 18:01:58 +0400 From: Konstantin Khlebnikov MIME-Version: 1.0 Subject: Re: [PATCH v2 00/22] mm: lru_lock splitting References: <20120220171138.22196.65847.stgit@zurg> <4F447904.90500@openvz.org> <20120222061618.GT7703@one.firstfloor.org> In-Reply-To: <20120222061618.GT7703@one.firstfloor.org> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Andi Kleen Cc: "linux-mm@kvack.org" , Andrew Morton , "linux-kernel@vger.kernel.org" , Hugh Dickins , KAMEZAWA Hiroyuki , "tim.c.chen@linux.intel.com" Andi Kleen wrote: > On Wed, Feb 22, 2012 at 09:11:32AM +0400, Konstantin Khlebnikov wrote: >> Andi Kleen wrote: >>> Konstantin Khlebnikov writes: >>> >>> Konstantin, >>> >>>> There complete patch-set with my lru_lock splitting >>>> plus all related preparations and cleanups rebased to next-20120210 >>> >>> On large systems we're also seeing lock contention on the lru_lock >>> without using memcgs. Any thoughts how this could be extended for this >>> situation too? >> >> We can split lru_lock by pfn-based interleaving. >> After all these cleanups it is very easy. I already have patch for this. > > Cool. If you send it can try it out on a large system. See last patch in v3 patchset in lkml or in git: https://github.com/koct9i/linux/commits/lruvec-v3 > > This would split the LRU by pfn too, correct? Of course, I don't see any problems with splitting large zone into some independent pages subsets. But all sub-pages in huge-page should be in one lru, that's why I use pfn-based interleaving. > > -Andi -- 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