Subject: + mm-softdirty-clear-vm_softdirty-flag-inside-clear_refs_write-instead-of-clear_soft_dirty.patch added to -mm tree
To: gorcunov@xxxxxxxxxx,hughd@xxxxxxxxxx,xemul@xxxxxxxxxxxxx
From: akpm@xxxxxxxxxxxxxxxxxxxx
Date: Mon, 14 Apr 2014 15:28:35 -0700
The patch titled
Subject: mm: softdirty: clear VM_SOFTDIRTY flag inside clear_refs_write() instead of clear_soft_dirty()
has been added to the -mm tree. Its filename is
mm-softdirty-clear-vm_softdirty-flag-inside-clear_refs_write-instead-of-clear_soft_dirty.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-softdirty-clear-vm_softdirty-flag-inside-clear_refs_write-instead-of-clear_soft_dirty.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-softdirty-clear-vm_softdirty-flag-inside-clear_refs_write-instead-of-clear_soft_dirty.patch
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------------------------------------------------------
From: Cyrill Gorcunov <gorcunov@xxxxxxxxxx>
Subject: mm: softdirty: clear VM_SOFTDIRTY flag inside clear_refs_write() instead of clear_soft_dirty()
clear_refs_write() is called earlier than clear_soft_dirty() and it is
more natural to clear VM_SOFTDIRTY (which belongs to VMA entry but not
PTEs) that early instead of clearing it a way deeper inside call chain.
Signed-off-by: Cyrill Gorcunov <gorcunov@xxxxxxxxxx>
Cc: Pavel Emelyanov <xemul@xxxxxxxxxxxxx>
Cc: Hugh Dickins <hughd@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/proc/task_mmu.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff -puN fs/proc/task_mmu.c~mm-softdirty-clear-vm_softdirty-flag-inside-clear_refs_write-instead-of-clear_soft_dirty fs/proc/task_mmu.c
--- a/fs/proc/task_mmu.c~mm-softdirty-clear-vm_softdirty-flag-inside-clear_refs_write-instead-of-clear_soft_dirty
+++ a/fs/proc/task_mmu.c
@@ -737,9 +737,6 @@ static inline void clear_soft_dirty(stru
ptent = pte_file_clear_soft_dirty(ptent);
}
- if (vma->vm_flags & VM_SOFTDIRTY)
- vma->vm_flags &= ~VM_SOFTDIRTY;
-
set_pte_at(vma->vm_mm, addr, pte, ptent);
#endif
}
@@ -844,6 +841,10 @@ static ssize_t clear_refs_write(struct f
continue;
if (type == CLEAR_REFS_MAPPED && !vma->vm_file)
continue;
+ if (type == CLEAR_REFS_SOFT_DIRTY) {
+ if (vma->vm_flags & VM_SOFTDIRTY)
+ vma->vm_flags &= ~VM_SOFTDIRTY;
+ }
walk_page_range(vma->vm_start, vma->vm_end,
&clear_refs_walk);
}
_
Patches currently in -mm which might be from gorcunov@xxxxxxxxxx are
mm-softdirty-make-freshly-remapped-file-pages-being-softdirty-unconditionally.patch
mm-softdirty-dont-forget-to-save-file-map-softdiry-bit-on-unmap.patch
mm-softdirty-clear-vm_softdirty-flag-inside-clear_refs_write-instead-of-clear_soft_dirty.patch
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