From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Tue, 23 Jan 2007 10:53:09 -0800 (PST) From: Christoph Lameter Message-Id: <20070123185309.2640.66744.sendpatchset@schroedinger.engr.sgi.com> In-Reply-To: <20070123185242.2640.8367.sendpatchset@schroedinger.engr.sgi.com> References: <20070123185242.2640.8367.sendpatchset@schroedinger.engr.sgi.com> Subject: [PATCH 5/5] Throttle vm writeout per cpuset Sender: owner-linux-mm@kvack.org Return-Path: To: akpm@osdl.org Cc: Paul Menage , Peter Zijlstra , Nick Piggin , linux-mm@kvack.org, Christoph Lameter , Paul Jackson , Dave Chinner , Andi Kleen List-ID: 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. Signed-off-by: Christoph Lameter Index: linux-2.6.20-rc5/include/linux/writeback.h =================================================================== --- linux-2.6.20-rc5.orig/include/linux/writeback.h 2007-01-15 21:37:05.209897874 -0600 +++ linux-2.6.20-rc5/include/linux/writeback.h 2007-01-15 21:37:33.283671963 -0600 @@ -85,7 +85,7 @@ 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(void); +void throttle_vm_writeout(nodemask_t *); /* These are exported to sysctl. */ extern int dirty_background_ratio; Index: linux-2.6.20-rc5/mm/page-writeback.c =================================================================== --- linux-2.6.20-rc5.orig/mm/page-writeback.c 2007-01-15 21:35:28.013794159 -0600 +++ linux-2.6.20-rc5/mm/page-writeback.c 2007-01-15 21:37:33.302228293 -0600 @@ -349,12 +349,12 @@ void balance_dirty_pages_ratelimited_nr( } EXPORT_SYMBOL(balance_dirty_pages_ratelimited_nr); -void throttle_vm_writeout(void) +void throttle_vm_writeout(nodemask_t *nodes) { struct dirty_limits dl; for ( ; ; ) { - get_dirty_limits(&dl, NULL, &node_online_map); + get_dirty_limits(&dl, NULL, nodes); /* * Boost the allowable dirty threshold a bit for page Index: linux-2.6.20-rc5/mm/vmscan.c =================================================================== --- linux-2.6.20-rc5.orig/mm/vmscan.c 2007-01-15 21:37:26.605346439 -0600 +++ linux-2.6.20-rc5/mm/vmscan.c 2007-01-15 21:37:33.316878027 -0600 @@ -949,7 +949,7 @@ static unsigned long shrink_zone(int pri } } - throttle_vm_writeout(); + throttle_vm_writeout(&cpuset_current_mems_allowed); atomic_dec(&zone->reclaim_in_progress); return nr_reclaimed; -- 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