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Date: Mon, 23 Mar 2009 10:03:56 +0900
From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To: "linux-mm@...ck.org" <linux-mm@...ck.org>
Cc: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"kosaki.motohiro@...fujitsu.com" <kosaki.motohiro@...fujitsu.com>,
"balbir@...ux.vnet.ibm.com" <balbir@...ux.vnet.ibm.com>,
mel@....ul.ie, riel@...hat.com,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"akpm@...ux-foundation.org" <akpm@...ux-foundation.org>
Subject: [PATCH] fix vmscan to take care of nodemask
From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...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@...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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