[corrected][RFC 5/7] cpuset write vm writeout
From: Ethan Solomita <hidden>
Date: 2007-06-01 06:16:33
Also in:
lkml
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 [off-list ref] Signed-off-by: Ethan Solomita <redacted> --- 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; --
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