From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759468AbXFAGQd (ORCPT ); Fri, 1 Jun 2007 02:16:33 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755319AbXFAGQZ (ORCPT ); Fri, 1 Jun 2007 02:16:25 -0400 Received: from smtp-out.google.com ([216.239.45.13]:40043 "EHLO smtp-out.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757126AbXFAGQY (ORCPT ); Fri, 1 Jun 2007 02:16:24 -0400 DomainKey-Signature: a=rsa-sha1; s=beta; d=google.com; c=nofws; q=dns; h=received:message-id:date:from:user-agent:mime-version:to: subject:references:in-reply-to:content-type:content-transfer-encoding; b=NVBoinm0G/r4Cu7Q6Hyp5/SU7AvzmUxULhR82sUfi02LA2fDCaVMJEiAaLmVxNq21 ZoPTCCpYoRXT3WC//c2mA== Message-ID: <465FB9A5.8070806@google.com> Date: Thu, 31 May 2007 23:16:05 -0700 From: Ethan Solomita User-Agent: Thunderbird 1.5.0.10 (Windows/20070221) MIME-Version: 1.0 To: linux-mm@kvack.org, LKML , Andrew Morton , a.p.zijlstra@chello.nl Subject: [corrected][RFC 5/7] cpuset write vm writeout References: <465FB6CF.4090801@google.com> In-Reply-To: <465FB6CF.4090801@google.com> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Throttle VM writeout in a cpuset aware way This bases the vm throttling from the reclaim path on the dirty ratio of the cpuset. Note that a cpuset is only effective if shrink_zone is called from direct reclaim. kswapd has a cpuset context that includes the whole machine. VM throttling will only work during synchrononous reclaim and not from kswapd. Originally by Christoph Lameter Signed-off-by: Ethan Solomita --- diff -uprN -X 0/Documentation/dontdiff 4/include/linux/writeback.h 5/include/linux/writeback.h --- 4/include/linux/writeback.h 2007-05-30 11:36:14.000000000 -0700 +++ 5/include/linux/writeback.h 2007-05-30 11:37:01.000000000 -0700 @@ -89,7 +89,7 @@ static inline void wait_on_inode(struct int wakeup_pdflush(long nr_pages, nodemask_t *nodes); void laptop_io_completion(void); void laptop_sync_completion(void); -void throttle_vm_writeout(gfp_t gfp_mask); +void throttle_vm_writeout(nodemask_t *nodes,gfp_t gfp_mask); /* These are exported to sysctl. */ extern int dirty_background_ratio; diff -uprN -X 0/Documentation/dontdiff 4/mm/page-writeback.c 5/mm/page-writeback.c --- 4/mm/page-writeback.c 2007-05-30 11:36:15.000000000 -0700 +++ 5/mm/page-writeback.c 2007-05-30 11:37:01.000000000 -0700 @@ -384,7 +384,7 @@ void balance_dirty_pages_ratelimited_nr( } EXPORT_SYMBOL(balance_dirty_pages_ratelimited_nr); -void throttle_vm_writeout(gfp_t gfp_mask) +void throttle_vm_writeout(nodemask_t *nodes, gfp_t gfp_mask) { struct dirty_limits dl; @@ -399,7 +399,7 @@ void throttle_vm_writeout(gfp_t gfp_mask } for ( ; ; ) { - get_dirty_limits(&dl, NULL, &node_online_map); + get_dirty_limits(&dl, NULL, nodes); /* * Boost the allowable dirty threshold a bit for page diff -uprN -X 0/Documentation/dontdiff 4/mm/vmscan.c 5/mm/vmscan.c --- 4/mm/vmscan.c 2007-05-30 11:36:17.000000000 -0700 +++ 5/mm/vmscan.c 2007-05-30 11:37:01.000000000 -0700 @@ -1079,7 +1079,7 @@ static unsigned long shrink_zone(int pri } } - throttle_vm_writeout(sc->gfp_mask); + throttle_vm_writeout(&cpuset_current_mems_allowed, sc->gfp_mask); atomic_dec(&zone->reclaim_in_progress); return nr_reclaimed;