From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <46E743B0.6070308@google.com> Date: Tue, 11 Sep 2007 18:41:04 -0700 From: Ethan Solomita MIME-Version: 1.0 Subject: [PATCH 5/6] cpuset write vm writeout References: <469D3342.3080405@google.com> <46E741B1.4030100@google.com> In-Reply-To: <46E741B1.4030100@google.com> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: Andrew Morton Cc: linux-mm@kvack.org, LKML , Christoph Lameter 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 Acked-by: Ethan Solomita --- Patch against 2.6.23-rc4-mm1 diff -uprN -X 0/Documentation/dontdiff 4/include/linux/writeback.h 5/include/linux/writeback.h --- 4/include/linux/writeback.h 2007-09-11 14:49:47.000000000 -0700 +++ 5/include/linux/writeback.h 2007-09-11 14:50:52.000000000 -0700 @@ -94,7 +94,7 @@ static inline void inode_sync_wait(struc 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 2007-09-11 14:49:47.000000000 -0700 +++ 5/mm/page-writeback.c 2007-09-11 14:50:52.000000000 -0700 @@ -386,7 +386,7 @@ 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; @@ -401,7 +401,7 @@ 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 2007-09-11 14:50:41.000000000 -0700 +++ 5/mm/vmscan.c 2007-09-11 14:50:52.000000000 -0700 @@ -1185,7 +1185,7 @@ 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; -- 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