Subject: + arch-powerpc-mm-subpage-protc-cleanup-subpage_walk_pmd_entry.patch added to -mm tree
To: n-horiguchi@xxxxxxxxxxxxx,aneesh.kumar@xxxxxxxxxxxxxxxxxx,benh@xxxxxxxxxxxxxxxxxxx,dave.hansen@xxxxxxxxx,hannes@xxxxxxxxxxx,hughd@xxxxxxxxxx,kamezawa.hiroyu@xxxxxxxxxxxxxx,kirill@xxxxxxxxxxxxx,kosaki.motohiro@xxxxxxxxxxxxxx,mhocko@xxxxxxx,riel@xxxxxxxxxx,xemul@xxxxxxxxxxxxx
From: akpm@xxxxxxxxxxxxxxxxxxxx
Date: Wed, 11 Jun 2014 16:21:34 -0700
The patch titled
Subject: arch/powerpc/mm/subpage-prot.c: cleanup subpage_walk_pmd_entry()
has been added to the -mm tree. Its filename is
arch-powerpc-mm-subpage-protc-cleanup-subpage_walk_pmd_entry.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/arch-powerpc-mm-subpage-protc-cleanup-subpage_walk_pmd_entry.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/arch-powerpc-mm-subpage-protc-cleanup-subpage_walk_pmd_entry.patch
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------------------------------------------------------
From: Naoya Horiguchi <n-horiguchi@xxxxxxxxxxxxx>
Subject: arch/powerpc/mm/subpage-prot.c: cleanup subpage_walk_pmd_entry()
Currently subpage_mark_vma_nohuge() uses page table walker to find thps
and then split them. But this can be done by page table walker itself, so
let's rewrite it in more suitable way. No functional change.
Signed-off-by: Naoya Horiguchi <n-horiguchi@xxxxxxxxxxxxx>
Cc: Dave Hansen <dave.hansen@xxxxxxxxx>
Cc: Hugh Dickins <hughd@xxxxxxxxxx>
Cc: "Kirill A. Shutemov" <kirill@xxxxxxxxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxx>
Cc: KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxxxxxxx>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@xxxxxxxxxxxxxxxxxx>
Cc: Pavel Emelyanov <xemul@xxxxxxxxxxxxx>
Cc: Rik van Riel <riel@xxxxxxxxxx>
Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/powerpc/mm/subpage-prot.c | 12 ++++++++----
1 file changed, 8 insertions(+), 4 deletions(-)
diff -puN arch/powerpc/mm/subpage-prot.c~arch-powerpc-mm-subpage-protc-cleanup-subpage_walk_pmd_entry arch/powerpc/mm/subpage-prot.c
--- a/arch/powerpc/mm/subpage-prot.c~arch-powerpc-mm-subpage-protc-cleanup-subpage_walk_pmd_entry
+++ a/arch/powerpc/mm/subpage-prot.c
@@ -131,11 +131,10 @@ static void subpage_prot_clear(unsigned
}
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
-static int subpage_walk_pmd_entry(pmd_t *pmd, unsigned long addr,
+static int subpage_walk_pte(pte_t *pte, unsigned long addr,
unsigned long end, struct mm_walk *walk)
{
- struct vm_area_struct *vma = walk->vma;
- split_huge_page_pmd(vma, addr, pmd);
+ walk->control = PTWALK_BREAK;
return 0;
}
@@ -143,9 +142,14 @@ static void subpage_mark_vma_nohuge(stru
unsigned long len)
{
struct vm_area_struct *vma;
+ /*
+ * What this walking expects is to split all thps under this mm.
+ * Page table walker internally splits thps just before we try to
+ * call .pte_entry() on them, so let's utilize it.
+ */
struct mm_walk subpage_proto_walk = {
.mm = mm,
- .pmd_entry = subpage_walk_pmd_entry,
+ .pte_entry = subpage_walk_pte,
};
/*
_
Patches currently in -mm which might be from n-horiguchi@xxxxxxxxxxxxx are
origin.patch
hwpoison-fix-the-handling-path-of-the-victimized-page-frame-that-belong-to-non-lur.patch
mm-hugetlbfs-fix-rmapping-for-anonymous-hugepages-with-page_pgoff.patch
mm-hugetlbfs-fix-rmapping-for-anonymous-hugepages-with-page_pgoff-v2.patch
mm-hugetlbfs-fix-rmapping-for-anonymous-hugepages-with-page_pgoff-v3.patch
mm-hugetlbfs-fix-rmapping-for-anonymous-hugepages-with-page_pgoff-v3-fix.patch
pagewalk-update-page-table-walker-core.patch
pagewalk-update-page-table-walker-core-fix-end-address-calculation-in-walk_page_range.patch
pagewalk-update-page-table-walker-core-fix-end-address-calculation-in-walk_page_range-fix.patch
pagewalk-update-page-table-walker-core-fix.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
pagemap-redefine-callback-functions-for-page-table-walker-fix.patch
numa_maps-redefine-callback-functions-for-page-table-walker.patch
memcg-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
pagewalk-remove-argument-hmask-from-hugetlb_entry-fix.patch
pagewalk-remove-argument-hmask-from-hugetlb_entry-fix-fix.patch
mempolicy-apply-page-table-walker-on-queue_pages_range.patch
mm-pagewalkc-move-pte-null-check.patch
mm-prom-pid-clear_refs-avoid-split_huge_page.patch
mm-pagewalk-remove-pgd_entry-and-pud_entry.patch
mm-pagewalk-replace-mm_walk-skip-with-more-general-mm_walk-control.patch
madvise-cleanup-swapin_walk_pmd_entry.patch
memcg-separate-mem_cgroup_move_charge_pte_range.patch
arch-powerpc-mm-subpage-protc-cleanup-subpage_walk_pmd_entry.patch
mm-pagewalk-move-pmd_trans_huge_lock-from-callbacks-to-common-code.patch
mincore-apply-page-table-walker-on-do_mincore.patch
mm-introduce-do_shared_fault-and-drop-do_fault-fix-fix.patch
do_shared_fault-check-that-mmap_sem-is-held.patch
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