Messages in this thread Patch in this message | | | Date | Mon, 23 Mar 2009 10:03:56 +0900 | From | KAMEZAWA Hiroyuki <> | Subject | [PATCH] fix vmscan to take care of nodemask |
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From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
try_to_free_pages() scans zonelist but doesn't take care of nodemask which is passed to alloc_pages_nodemask(). This makes try_to_free_pages() less effective.
Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> --- fs/buffer.c | 2 +- include/linux/swap.h | 2 +- mm/page_alloc.c | 3 ++- mm/vmscan.c | 14 ++++++++++++-- 4 files changed, 16 insertions(+), 5 deletions(-)
Index: mmotm-2.6.29-Mar21/mm/vmscan.c =================================================================== --- mmotm-2.6.29-Mar21.orig/mm/vmscan.c +++ mmotm-2.6.29-Mar21/mm/vmscan.c @@ -79,6 +79,9 @@ struct scan_control { /* Which cgroup do we reclaim from */ struct mem_cgroup *mem_cgroup; + /* Nodemask */ + nodemask_t *nodemask; + /* Pluggable isolate pages callback */ unsigned long (*isolate_pages)(unsigned long nr, struct list_head *dst, unsigned long *scanned, int order, int mode, @@ -1544,7 +1547,9 @@ static void shrink_zones(int priority, s struct zone *zone; sc->all_unreclaimable = 1; - for_each_zone_zonelist(zone, z, zonelist, high_zoneidx) { + /* Note: sc->nodemask==NULL means scan all node */ + for_each_zone_zonelist_nodemask(zone, z, zonelist, high_zoneidx, + sc->nodemask) { if (!populated_zone(zone)) continue; /* @@ -1689,7 +1694,7 @@ out: } unsigned long try_to_free_pages(struct zonelist *zonelist, int order, - gfp_t gfp_mask) + gfp_t gfp_mask, nodemask_t *nodemask) { struct scan_control sc = { .gfp_mask = gfp_mask, @@ -1700,6 +1705,7 @@ unsigned long try_to_free_pages(struct z .order = order, .mem_cgroup = NULL, .isolate_pages = isolate_pages_global, + .nodemask = nodemask, }; return do_try_to_free_pages(zonelist, &sc); @@ -1720,6 +1726,7 @@ unsigned long try_to_free_mem_cgroup_pag .order = 0, .mem_cgroup = mem_cont, .isolate_pages = mem_cgroup_isolate_pages, + .nodemask = NULL, }; struct zonelist *zonelist; @@ -1769,6 +1776,7 @@ static unsigned long balance_pgdat(pg_da .order = order, .mem_cgroup = NULL, .isolate_pages = isolate_pages_global, + .nodemask = NULL, }; /* * temp_priority is used to remember the scanning priority at which @@ -2112,6 +2120,7 @@ unsigned long shrink_all_memory(unsigned .may_unmap = 0, .may_writepage = 1, .isolate_pages = isolate_pages_global, + .nodemask = NULL, }; current->reclaim_state = &reclaim_state; @@ -2298,6 +2307,7 @@ static int __zone_reclaim(struct zone *z .swappiness = vm_swappiness, .order = order, .isolate_pages = isolate_pages_global, + .nodemask = NULL, }; unsigned long slab_reclaimable; Index: mmotm-2.6.29-Mar21/include/linux/swap.h =================================================================== --- mmotm-2.6.29-Mar21.orig/include/linux/swap.h +++ mmotm-2.6.29-Mar21/include/linux/swap.h @@ -213,7 +213,7 @@ static inline void lru_cache_add_active_ /* linux/mm/vmscan.c */ extern unsigned long try_to_free_pages(struct zonelist *zonelist, int order, - gfp_t gfp_mask); + gfp_t gfp_mask, nodemask_t *mask); extern unsigned long try_to_free_mem_cgroup_pages(struct mem_cgroup *mem, gfp_t gfp_mask, bool noswap, unsigned int swappiness); Index: mmotm-2.6.29-Mar21/mm/page_alloc.c =================================================================== --- mmotm-2.6.29-Mar21.orig/mm/page_alloc.c +++ mmotm-2.6.29-Mar21/mm/page_alloc.c @@ -1598,7 +1598,8 @@ nofail_alloc: reclaim_state.reclaimed_slab = 0; p->reclaim_state = &reclaim_state; - did_some_progress = try_to_free_pages(zonelist, order, gfp_mask); + did_some_progress = try_to_free_pages(zonelist, order, + gfp_mask, nodemask); p->reclaim_state = NULL; lockdep_clear_current_reclaim_state(); Index: mmotm-2.6.29-Mar21/fs/buffer.c =================================================================== --- mmotm-2.6.29-Mar21.orig/fs/buffer.c +++ mmotm-2.6.29-Mar21/fs/buffer.c @@ -476,7 +476,7 @@ static void free_more_memory(void) &zone); if (zone) try_to_free_pages(node_zonelist(nid, GFP_NOFS), 0, - GFP_NOFS); + GFP_NOFS, NULL); } }
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