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memcg: cleanup preparation for page table walk 

pagewalk.c can handle vma in itself, so we don't have to pass vma via
walk->private.  And both of mem_cgroup_count_precharge() and
mem_cgroup_move_charge() do for each vma loop themselves, but now it's
done in pagewalk.c, so let's clean up them.

Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Cyrill Gorcunov <gorcunov@openvz.org>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Pavel Emelyanov <xemul@parallels.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Naoya Horiguchi 2015-02-11 15:27:57 -08:00 committed by Linus Torvalds
parent d85f4d6d3b
commit 26bcd64aa9
1 changed files with 16 additions and 33 deletions
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49
mm/memcontrol.c
View File

@ -4839,7 +4839,7 @@ static int mem_cgroup_count_precharge_pte_range(pmd_t *pmd,
unsigned long addr, unsigned long end,
struct mm_walk *walk)
{
struct vm_area_struct *vma = walk->private;
struct vm_area_struct *vma = walk->vma;
pte_t *pte;
spinlock_t *ptl;
@ -4865,20 +4865,13 @@ static int mem_cgroup_count_precharge_pte_range(pmd_t *pmd,
static unsigned long mem_cgroup_count_precharge(struct mm_struct *mm)
{
unsigned long precharge;
struct vm_area_struct *vma;
struct mm_walk mem_cgroup_count_precharge_walk = {
.pmd_entry = mem_cgroup_count_precharge_pte_range,
.mm = mm,
};
down_read(&mm->mmap_sem);
for (vma = mm->mmap; vma; vma = vma->vm_next) {
struct mm_walk mem_cgroup_count_precharge_walk = {
.pmd_entry = mem_cgroup_count_precharge_pte_range,
.mm = mm,
.private = vma,
};
if (is_vm_hugetlb_page(vma))
continue;
walk_page_range(vma->vm_start, vma->vm_end,
&mem_cgroup_count_precharge_walk);
}
walk_page_range(0, ~0UL, &mem_cgroup_count_precharge_walk);
up_read(&mm->mmap_sem);
precharge = mc.precharge;
@ -5011,7 +5004,7 @@ static int mem_cgroup_move_charge_pte_range(pmd_t *pmd,
struct mm_walk *walk)
{
int ret = 0;
struct vm_area_struct *vma = walk->private;
struct vm_area_struct *vma = walk->vma;
pte_t *pte;
spinlock_t *ptl;
enum mc_target_type target_type;
@ -5107,7 +5100,10 @@ put: /* get_mctgt_type() gets the page */
static void mem_cgroup_move_charge(struct mm_struct *mm)
{
struct vm_area_struct *vma;
struct mm_walk mem_cgroup_move_charge_walk = {
.pmd_entry = mem_cgroup_move_charge_pte_range,
.mm = mm,
};
lru_add_drain_all();
/*
@ -5130,24 +5126,11 @@ retry:
cond_resched();
goto retry;
}
for (vma = mm->mmap; vma; vma = vma->vm_next) {
int ret;
struct mm_walk mem_cgroup_move_charge_walk = {
.pmd_entry = mem_cgroup_move_charge_pte_range,
.mm = mm,
.private = vma,
};
if (is_vm_hugetlb_page(vma))
continue;
ret = walk_page_range(vma->vm_start, vma->vm_end,
&mem_cgroup_move_charge_walk);
if (ret)
/*
* means we have consumed all precharges and failed in
* doing additional charge. Just abandon here.
*/
break;
}
/*
* When we have consumed all precharges and failed in doing
* additional charge, the page walk just aborts.
*/
walk_page_range(0, ~0UL, &mem_cgroup_move_charge_walk);
up_read(&mm->mmap_sem);
atomic_dec(&mc.from->moving_account);
}