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| author | Balbir Singh <balbir@linux.vnet.ibm.com> | 2008-02-07 00:14:02 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2008-02-07 08:42:19 -0800 |
| commit | e1a1cd590e3fcb0d2e230128daf2337ea55387dc (patch) | |
| tree | eb660ab340c657a1eb595b2d4d8e8b62783bf6fb /mm/vmscan.c | |
| parent | bed7161a519a2faef53e1bce1b47595e297c1d14 (diff) | |
| download | op-kernel-dev-e1a1cd590e3fcb0d2e230128daf2337ea55387dc.zip op-kernel-dev-e1a1cd590e3fcb0d2e230128daf2337ea55387dc.tar.gz | |
Memory controller: make charging gfp mask aware
Nick Piggin pointed out that swap cache and page cache addition routines
could be called from non GFP_KERNEL contexts. This patch makes the
charging routine aware of the gfp context. Charging might fail if the
cgroup is over it's limit, in which case a suitable error is returned.
This patch was tested on a Powerpc box. I am still looking at being able
to test the path, through which allocations happen in non GFP_KERNEL
contexts.
[kamezawa.hiroyu@jp.fujitsu.com: problem with ZONE_MOVABLE]
Signed-off-by: Balbir Singh <balbir@linux.vnet.ibm.com>
Cc: Pavel Emelianov <xemul@openvz.org>
Cc: Paul Menage <menage@google.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Cc: Kirill Korotaev <dev@sw.ru>
Cc: Herbert Poetzl <herbert@13thfloor.at>
Cc: David Rientjes <rientjes@google.com>
Cc: Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com>
Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/vmscan.c')
| -rw-r--r-- | mm/vmscan.c | 14 |
1 files changed, 5 insertions, 9 deletions
diff --git a/mm/vmscan.c b/mm/vmscan.c index 215f6a7..b7d868c 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -1337,16 +1337,11 @@ unsigned long try_to_free_pages(struct zone **zones, int order, gfp_t gfp_mask) #ifdef CONFIG_CGROUP_MEM_CONT -#ifdef CONFIG_HIGHMEM -#define ZONE_USERPAGES ZONE_HIGHMEM -#else -#define ZONE_USERPAGES ZONE_NORMAL -#endif - -unsigned long try_to_free_mem_cgroup_pages(struct mem_cgroup *mem_cont) +unsigned long try_to_free_mem_cgroup_pages(struct mem_cgroup *mem_cont, + gfp_t gfp_mask) { struct scan_control sc = { - .gfp_mask = GFP_KERNEL, + .gfp_mask = gfp_mask, .may_writepage = !laptop_mode, .may_swap = 1, .swap_cluster_max = SWAP_CLUSTER_MAX, @@ -1357,9 +1352,10 @@ unsigned long try_to_free_mem_cgroup_pages(struct mem_cgroup *mem_cont) }; int node; struct zone **zones; + int target_zone = gfp_zone(GFP_HIGHUSER_MOVABLE); for_each_online_node(node) { - zones = NODE_DATA(node)->node_zonelists[ZONE_USERPAGES].zones; + zones = NODE_DATA(node)->node_zonelists[target_zone].zones; if (do_try_to_free_pages(zones, sc.gfp_mask, &sc)) return 1; } |
