Subject: + mm-introduce-do_shared_fault-and-drop-do_fault-fix-fix.patch added to -mm tree
To: akpm@xxxxxxxxxxxxxxxxxxxx,ak@xxxxxxxxxxxxxxx,dave.hansen@xxxxxxxxxxxxxxx,kirill.shutemov@xxxxxxxxxxxxxxx,lliubbo@xxxxxxxxx,matthew.r.wilcox@xxxxxxxxx,mgorman@xxxxxxx,n-horiguchi@xxxxxxxxxxxxx,riel@xxxxxxxxxx,sasha.levin@xxxxxxxxxx
From: akpm@xxxxxxxxxxxxxxxxxxxx
Date: Fri, 28 Feb 2014 14:00:25 -0800
The patch titled
Subject: mm-introduce-do_shared_fault-and-drop-do_fault-fix-fix
has been added to the -mm tree. Its filename is
mm-introduce-do_shared_fault-and-drop-do_fault-fix-fix.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-introduce-do_shared_fault-and-drop-do_fault-fix-fix.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-introduce-do_shared_fault-and-drop-do_fault-fix-fix.patch
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------------------------------------------------------
From: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Subject: mm-introduce-do_shared_fault-and-drop-do_fault-fix-fix
add comment which may not be true :(
Cc: Andi Kleen <ak@xxxxxxxxxxxxxxx>
Cc: Bob Liu <lliubbo@xxxxxxxxx>
Cc: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
Cc: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
Cc: Matthew Wilcox <matthew.r.wilcox@xxxxxxxxx>
Cc: Mel Gorman <mgorman@xxxxxxx>
Cc: Naoya Horiguchi <n-horiguchi@xxxxxxxxxxxxx>
Cc: Rik van Riel <riel@xxxxxxxxxx>
Cc: Sasha Levin <sasha.levin@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/memory.c | 6 ++++++
1 file changed, 6 insertions(+)
diff -puN mm/memory.c~mm-introduce-do_shared_fault-and-drop-do_fault-fix-fix mm/memory.c
--- a/mm/memory.c~mm-introduce-do_shared_fault-and-drop-do_fault-fix-fix
+++ a/mm/memory.c
@@ -3476,6 +3476,12 @@ set_pte:
if (set_page_dirty(fault_page))
dirtied = 1;
+ /*
+ * Take a local copy of the address_space - page.mapping may be zeroed
+ * by truncate after unlock_page(). The address_space itself remains
+ * pinned by vma->vm_file's reference. We rely on unlock_page()'s
+ * release semantics to prevent the compiler from undoing this copying.
+ */
mapping = fault_page->mapping;
unlock_page(fault_page);
if ((dirtied || vma->vm_ops->page_mkwrite) && mapping) {
_
Patches currently in -mm which might be from akpm@xxxxxxxxxxxxxxxxxxxx are
origin.patch
arch-alpha-kernel-systblss-remove-debug-check.patch
i-need-old-gcc.patch
maintainers-akpm-maintenance.patch
input-route-kbd-leds-through-the-generic-leds-layer.patch
ocfs2-add-dlm_recover_callback_support-in-sysfs-fix.patch
mm.patch
mm-hugetlb-improve-page-fault-scalability-fix.patch
mm-vmstat-fix-up-zone-state-accounting-fix.patch
mm-keep-page-cache-radix-tree-nodes-in-check-fix-fix.patch
mm-process_vm_accessc-mark-function-as-static-fix.patch
pagewalk-update-page-table-walker-core-fix-end-address-calculation-in-walk_page_range-fix.patch
pagewalk-remove-argument-hmask-from-hugetlb_entry-fix-fix.patch
mm-introduce-do_shared_fault-and-drop-do_fault-fix-fix.patch
drop_caches-add-some-documentation-and-info-message.patch
mmnuma-reorganize-change_pmd_range-fix.patch
include-linux-syscallsh-add-sys32_quotactl-prototype-fix.patch
sys_sysfs-add-config_sysfs_syscall-fix.patch
kernel-groupsc-remove-return-value-of-set_groups-fix.patch
ncpfs-convert-dprintk-ddprintk-to-ncp_dbg-fix.patch
ncpfs-convert-dprintk-ddprintk-to-ncp_dbg-fix-fix.patch
hfsplus-fix-concurrent-acess-of-alloc_blocks-fix.patch
hfsplus-fix-concurrent-acess-of-alloc_blocks-fix-fix.patch
kmod-run-usermodehelpers-only-on-cpus-allowed-for-kthreadd-v2-fix.patch
kmod-run-usermodehelpers-only-on-cpus-allowed-for-kthreadd-v2-checkpatch-fixes.patch
include-linux-crash_dumph-add-vmcore_cleanup-prototype-fix.patch
kernel-panicc-display-reason-at-end-pr_emerg-fix.patch
fault-injection-set-bounds-on-what-proc-self-make-it-fail-accepts-fix.patch
initramfs-debug-detected-compression-method-fix.patch
linux-next.patch
linux-next-rejects.patch
debugging-keep-track-of-page-owners.patch
journal_add_journal_head-debug.patch
kernel-forkc-export-kernel_thread-to-modules.patch
mutex-subsystem-synchro-test-module.patch
slab-leaks3-default-y.patch
put_bh-debug.patch
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