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authorKAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>2009-01-07 18:07:49 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2009-01-08 08:31:04 -0800
commitbced0520fe462bb94021dcabd32e99630c171be2 (patch)
tree6fa234f4a25bc8231742aea13e7cc2664b0a69a6 /mm/memcontrol.c
parent7a81b88cb53e335ff7d019e6398c95792c817d93 (diff)
downloadop-kernel-dev-bced0520fe462bb94021dcabd32e99630c171be2.zip
op-kernel-dev-bced0520fe462bb94021dcabd32e99630c171be2.tar.gz
memcg: fix gfp_mask of callers of charge
Fix misuse of gfp_kernel. Now, most of callers of mem_cgroup_charge_xxx functions uses GFP_KERNEL. I think that this is from the fact that page_cgroup *was* dynamically allocated. But now, we allocate all page_cgroup at boot. And mem_cgroup_try_to_free_pages() reclaim memory from GFP_HIGHUSER_MOVABLE + specified GFP_RECLAIM_MASK. * This is because we just want to reduce memory usage. "Where we should reclaim from ?" is not a problem in memcg. This patch modifies gfp masks to be GFP_HIGUSER_MOVABLE if possible. Note: This patch is not for fixing behavior but for showing sane information in source code. Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Reviewed-by: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp> Cc: Balbir Singh <balbir@in.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/memcontrol.c')
-rw-r--r--mm/memcontrol.c8
1 files changed, 5 insertions, 3 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index f568b19..c34eb52 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -808,8 +808,9 @@ int mem_cgroup_prepare_migration(struct page *page, struct page *newpage)
}
unlock_page_cgroup(pc);
if (mem) {
- ret = mem_cgroup_charge_common(newpage, NULL, GFP_KERNEL,
- ctype, mem);
+ ret = mem_cgroup_charge_common(newpage, NULL,
+ GFP_HIGHUSER_MOVABLE,
+ ctype, mem);
css_put(&mem->css);
}
return ret;
@@ -889,7 +890,8 @@ static int mem_cgroup_resize_limit(struct mem_cgroup *memcg,
ret = -EBUSY;
break;
}
- progress = try_to_free_mem_cgroup_pages(memcg, GFP_KERNEL);
+ progress = try_to_free_mem_cgroup_pages(memcg,
+ GFP_HIGHUSER_MOVABLE);
if (!progress)
retry_count--;
}
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