Subject: + mm-consolidate-code-to-call-vm_ops-page_mkwrite-fix.patch added to -mm tree
To: kirill.shutemov@xxxxxxxxxxxxxxx,ak@xxxxxxxxxxxxxxx,dave.hansen@xxxxxxxxxxxxxxx,matthew.r.wilcox@xxxxxxxxx,mgorman@xxxxxxx,n-horiguchi@xxxxxxxxxxxxx,riel@xxxxxxxxxx
From: akpm@xxxxxxxxxxxxxxxxxxxx
Date: Tue, 18 Feb 2014 13:58:02 -0800
The patch titled
Subject: mm-consolidate-code-to-call-vm_ops-page_mkwrite-fix
has been added to the -mm tree. Its filename is
mm-consolidate-code-to-call-vm_ops-page_mkwrite-fix.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-consolidate-code-to-call-vm_ops-page_mkwrite-fix.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-consolidate-code-to-call-vm_ops-page_mkwrite-fix.patch
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From: "Kirill A. Shutemov" <kirill.shutemov@xxxxxxxxxxxxxxx>
Subject: mm-consolidate-code-to-call-vm_ops-page_mkwrite-fix
I forgot to set VM_FAULT_LOCKED bit in do_page_mkwrite() return code, if
we lock the page in do_page_mkwrite(). It triggers deadlock, if
->page_mkwrite doesn't take page lock on its own.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
Cc: Mel Gorman <mgorman@xxxxxxx>
Cc: Rik van Riel <riel@xxxxxxxxxx>
Cc: Andi Kleen <ak@xxxxxxxxxxxxxxx>
Cc: Matthew Wilcox <matthew.r.wilcox@xxxxxxxxx>
Cc: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
Cc: Naoya Horiguchi <n-horiguchi@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/memory.c | 1 +
1 file changed, 1 insertion(+)
diff -puN mm/memory.c~mm-consolidate-code-to-call-vm_ops-page_mkwrite-fix mm/memory.c
--- a/mm/memory.c~mm-consolidate-code-to-call-vm_ops-page_mkwrite-fix
+++ a/mm/memory.c
@@ -2612,6 +2612,7 @@ static int do_page_mkwrite(struct vm_are
unlock_page(page);
return 0; /* retry */
}
+ ret |= VM_FAULT_LOCKED;
} else
VM_BUG_ON_PAGE(!PageLocked(page), page);
return ret;
_
Patches currently in -mm which might be from kirill.shutemov@xxxxxxxxxxxxxxx are
mm-hwpoison-release-page-on-pagehwpoison-in-__do_fault.patch
mm-thp-fix-infinite-loop-on-memcg-oom.patch
memcg-change-oom_info_lock-to-mutex.patch
mm-close-pagetail-race.patch
mm-page_alloc-make-first_page-visible-before-pagetail.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
mm-rename-__do_fault-do_fault.patch
mm-do_fault-extract-to-call-vm_ops-do_fault-to-separate-function.patch
mm-introduce-do_read_fault.patch
mm-introduce-do_cow_fault.patch
mm-introduce-do_shared_fault-and-drop-do_fault.patch
mm-consolidate-code-to-call-vm_ops-page_mkwrite.patch
mm-consolidate-code-to-call-vm_ops-page_mkwrite-fix.patch
mm-consolidate-code-to-setup-pte.patch
mm-thp-drop-do_huge_pmd_wp_zero_page_fallback.patch
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