From bced0520fe462bb94021dcabd32e99630c171be2 Mon Sep 17 00:00:00 2001 From: KAMEZAWA Hiroyuki Date: Wed, 7 Jan 2009 18:07:49 -0800 Subject: 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 Reviewed-by: Daisuke Nishimura Cc: Balbir Singh Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/memory.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) (limited to 'mm/memory.c') diff --git a/mm/memory.c b/mm/memory.c index 7f210f16099..ba5189e322e 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; -- cgit v1.2.3