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authorKAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>2009-01-08 02:07:49 (GMT)
committerLinus Torvalds <torvalds@linux-foundation.org>2009-01-08 16:31:04 (GMT)
commitbced0520fe462bb94021dcabd32e99630c171be2 (patch)
tree6fa234f4a25bc8231742aea13e7cc2664b0a69a6
parent7a81b88cb53e335ff7d019e6398c95792c817d93 (diff)
downloadlinux-bced0520fe462bb94021dcabd32e99630c171be2.tar.xz
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>
-rw-r--r--mm/memcontrol.c8
-rw-r--r--mm/memory.c9
-rw-r--r--mm/shmem.c6
-rw-r--r--mm/swapfile.c2
4 files changed, 14 insertions, 11 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--;
}
diff --git a/mm/memory.c b/mm/memory.c
index 7f210f1..ba5189e 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -2000,7 +2000,7 @@ gotten:
cow_user_page(new_page, old_page, address, vma);
__SetPageUptodate(new_page);
- if (mem_cgroup_newpage_charge(new_page, mm, GFP_KERNEL))
+ if (mem_cgroup_newpage_charge(new_page, mm, GFP_HIGHUSER_MOVABLE))
goto oom_free_new;
/*
@@ -2431,7 +2431,7 @@ static int do_swap_page(struct mm_struct *mm, struct vm_area_struct *vma,
lock_page(page);
delayacct_clear_flag(DELAYACCT_PF_SWAPIN);
- if (mem_cgroup_try_charge(mm, GFP_KERNEL, &ptr) == -ENOMEM) {
+ if (mem_cgroup_try_charge(mm, GFP_HIGHUSER_MOVABLE, &ptr) == -ENOMEM) {
ret = VM_FAULT_OOM;
unlock_page(page);
goto out;
@@ -2512,7 +2512,7 @@ static int do_anonymous_page(struct mm_struct *mm, struct vm_area_struct *vma,
goto oom;
__SetPageUptodate(page);
- if (mem_cgroup_newpage_charge(page, mm, GFP_KERNEL))
+ if (mem_cgroup_newpage_charge(page, mm, GFP_HIGHUSER_MOVABLE))
goto oom_free_page;
entry = mk_pte(page, vma->vm_page_prot);
@@ -2603,7 +2603,8 @@ static int __do_fault(struct mm_struct *mm, struct vm_area_struct *vma,
ret = VM_FAULT_OOM;
goto out;
}
- if (mem_cgroup_newpage_charge(page, mm, GFP_KERNEL)) {
+ if (mem_cgroup_newpage_charge(page,
+ mm, GFP_HIGHUSER_MOVABLE)) {
ret = VM_FAULT_OOM;
page_cache_release(page);
goto out;
diff --git a/mm/shmem.c b/mm/shmem.c
index 5941f98..bd9b4ea 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -928,8 +928,8 @@ found:
error = 1;
if (!inode)
goto out;
- /* Precharge page using GFP_KERNEL while we can wait */
- error = mem_cgroup_cache_charge(page, current->mm, GFP_KERNEL);
+ /* Charge page using GFP_HIGHUSER_MOVABLE while we can wait */
+ error = mem_cgroup_cache_charge(page, current->mm, GFP_HIGHUSER_MOVABLE);
if (error)
goto out;
error = radix_tree_preload(GFP_KERNEL);
@@ -1379,7 +1379,7 @@ repeat:
/* Precharge page while we can wait, compensate after */
error = mem_cgroup_cache_charge(filepage, current->mm,
- gfp & ~__GFP_HIGHMEM);
+ GFP_HIGHUSER_MOVABLE);
if (error) {
page_cache_release(filepage);
shmem_unacct_blocks(info->flags, 1);
diff --git a/mm/swapfile.c b/mm/swapfile.c
index fb926ef..ddc6d92 100644
--- a/mm/swapfile.c
+++ b/mm/swapfile.c
@@ -695,7 +695,7 @@ static int unuse_pte(struct vm_area_struct *vma, pmd_t *pmd,
pte_t *pte;
int ret = 1;
- if (mem_cgroup_try_charge(vma->vm_mm, GFP_KERNEL, &ptr))
+ if (mem_cgroup_try_charge(vma->vm_mm, GFP_HIGHUSER_MOVABLE, &ptr))
ret = -ENOMEM;
pte = pte_offset_map_lock(vma->vm_mm, pmd, addr, &ptl);