Subject: + smaps-redefine-callback-functions-for-page-table-walker.patch added to -mm tree
To: n-horiguchi@xxxxxxxxxxxxx,aneesh.kumar@xxxxxxxxxxxxxxxxxx,benh@xxxxxxxxxxxxxxxxxxx,cpw@xxxxxxx,hannes@xxxxxxxxxxx,kamezawa.hiroyu@xxxxxxxxxxxxxx,kirill.shutemov@xxxxxxxxxxxxxxx,kosaki.motohiro@xxxxxxxxxxxxxx,mhocko@xxxxxxx,mpm@xxxxxxxxxxx,riel@xxxxxxxxxx,xemul@xxxxxxxxxxxxx
From: akpm@xxxxxxxxxxxxxxxxxxxx
Date: Mon, 10 Feb 2014 14:42:12 -0800
The patch titled
Subject: smaps: redefine callback functions for page table walker
has been added to the -mm tree. Its filename is
smaps-redefine-callback-functions-for-page-table-walker.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/smaps-redefine-callback-functions-for-page-table-walker.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/smaps-redefine-callback-functions-for-page-table-walker.patch
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------------------------------------------------------
From: Naoya Horiguchi <n-horiguchi@xxxxxxxxxxxxx>
Subject: smaps: redefine callback functions for page table walker
smaps_pte_range() connected to pmd_entry() does both of pmd loop and pte
loop. So this patch moves pte part into smaps_pte() on pte_entry() as
expected by the name.
Signed-off-by: Naoya Horiguchi <n-horiguchi@xxxxxxxxxxxxx>
Cc: Matt Mackall <mpm@xxxxxxxxxxx>
Cc: Cliff Wickman <cpw@xxxxxxx>
Cc: KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxx>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@xxxxxxxxxxxxxxxxxx>
Cc: Pavel Emelyanov <xemul@xxxxxxxxxxxxx>
Cc: Rik van Riel <riel@xxxxxxxxxx>
Cc: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/proc/task_mmu.c | 47 +++++++++++++++----------------------------
1 file changed, 17 insertions(+), 30 deletions(-)
diff -puN fs/proc/task_mmu.c~smaps-redefine-callback-functions-for-page-table-walker fs/proc/task_mmu.c
--- a/fs/proc/task_mmu.c~smaps-redefine-callback-functions-for-page-table-walker
+++ a/fs/proc/task_mmu.c
@@ -423,7 +423,6 @@ const struct file_operations proc_tid_ma
#ifdef CONFIG_PROC_PAGE_MONITOR
struct mem_size_stats {
- struct vm_area_struct *vma;
unsigned long resident;
unsigned long shared_clean;
unsigned long shared_dirty;
@@ -437,15 +436,16 @@ struct mem_size_stats {
u64 pss;
};
-
-static void smaps_pte_entry(pte_t ptent, unsigned long addr,
- unsigned long ptent_size, struct mm_walk *walk)
+static int smaps_pte(pte_t *pte, unsigned long addr, unsigned long end,
+ struct mm_walk *walk)
{
struct mem_size_stats *mss = walk->private;
- struct vm_area_struct *vma = mss->vma;
+ struct vm_area_struct *vma = walk->vma;
pgoff_t pgoff = linear_page_index(vma, addr);
struct page *page = NULL;
int mapcount;
+ pte_t ptent = *pte;
+ unsigned long ptent_size = end - addr;
if (pte_present(ptent)) {
page = vm_normal_page(vma, addr, ptent);
@@ -462,7 +462,7 @@ static void smaps_pte_entry(pte_t ptent,
}
if (!page)
- return;
+ return 0;
if (PageAnon(page))
mss->anonymous += ptent_size;
@@ -488,35 +488,22 @@ static void smaps_pte_entry(pte_t ptent,
mss->private_clean += ptent_size;
mss->pss += (ptent_size << PSS_SHIFT);
}
+ return 0;
}
-static int smaps_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end,
- struct mm_walk *walk)
+static int smaps_pmd(pmd_t *pmd, unsigned long addr, unsigned long end,
+ struct mm_walk *walk)
{
struct mem_size_stats *mss = walk->private;
- struct vm_area_struct *vma = mss->vma;
- pte_t *pte;
spinlock_t *ptl;
- if (pmd_trans_huge_lock(pmd, vma, &ptl) == 1) {
- smaps_pte_entry(*(pte_t *)pmd, addr, HPAGE_PMD_SIZE, walk);
+ if (pmd_trans_huge_lock(pmd, walk->vma, &ptl) == 1) {
+ smaps_pte((pte_t *)pmd, addr, addr + HPAGE_PMD_SIZE, walk);
spin_unlock(ptl);
mss->anonymous_thp += HPAGE_PMD_SIZE;
- return 0;
+ /* don't call smaps_pte() */
+ walk->skip = 1;
}
-
- if (pmd_trans_unstable(pmd))
- return 0;
- /*
- * The mmap_sem held all the way back in m_start() is what
- * keeps khugepaged out of here and from collapsing things
- * in here.
- */
- pte = pte_offset_map_lock(vma->vm_mm, pmd, addr, &ptl);
- for (; addr != end; pte++, addr += PAGE_SIZE)
- smaps_pte_entry(*pte, addr, PAGE_SIZE, walk);
- pte_unmap_unlock(pte - 1, ptl);
- cond_resched();
return 0;
}
@@ -581,16 +568,16 @@ static int show_smap(struct seq_file *m,
struct vm_area_struct *vma = v;
struct mem_size_stats mss;
struct mm_walk smaps_walk = {
- .pmd_entry = smaps_pte_range,
+ .pmd_entry = smaps_pmd,
+ .pte_entry = smaps_pte,
.mm = vma->vm_mm,
+ .vma = vma,
.private = &mss,
};
memset(&mss, 0, sizeof mss);
- mss.vma = vma;
/* mmap_sem is held in m_start */
- if (vma->vm_mm && !is_vm_hugetlb_page(vma))
- walk_page_range(vma->vm_start, vma->vm_end, &smaps_walk);
+ walk_page_vma(vma, &smaps_walk);
show_map_vma(m, vma, is_pid);
_
Patches currently in -mm which might be from n-horiguchi@xxxxxxxxxxxxx are
mm-memory-failurec-move-refcount-only-in-mf_count_increased.patch
mm-hugetlb-unify-region-structure-handling.patch
mm-hugetlb-improve-cleanup-resv_map-parameters.patch
mm-hugetlb-fix-race-in-region-tracking.patch
mm-hugetlb-remove-resv_map_put.patch
mm-hugetlb-use-vma_resv_map-map-types.patch
mm-hugetlb-improve-page-fault-scalability.patch
mm-hugetlb-improve-page-fault-scalability-fix.patch
pagewalk-update-page-table-walker-core.patch
pagewalk-add-walk_page_vma.patch
smaps-redefine-callback-functions-for-page-table-walker.patch
clear_refs-redefine-callback-functions-for-page-table-walker.patch
pagemap-redefine-callback-functions-for-page-table-walker.patch
numa_maps-redefine-callback-functions-for-page-table-walker.patch
memcg-redefine-callback-functions-for-page-table-walker.patch
madvise-redefine-callback-functions-for-page-table-walker.patch
arch-powerpc-mm-subpage-protc-use-walk_page_vma-instead-of-walk_page_range.patch
pagewalk-remove-argument-hmask-from-hugetlb_entry.patch
mempolicy-apply-page-table-walker-on-queue_pages_range.patch
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