The patch titled
Subject: mm-fix-xip-fault-vs-truncate-race-fix-fix
has been added to the -mm tree. Its filename is
mm-fix-xip-fault-vs-truncate-race-fix-fix.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-fix-xip-fault-vs-truncate-race-fix-fix.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-fix-xip-fault-vs-truncate-race-fix-fix.patch
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*** Remember to use Documentation/SubmitChecklist when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Subject: mm-fix-xip-fault-vs-truncate-race-fix-fix
Cc: Matthew Wilcox <matthew.r.wilcox@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/memory.c | 6 +-----
1 file changed, 1 insertion(+), 5 deletions(-)
diff -puN mm/filemap_xip.c~mm-fix-xip-fault-vs-truncate-race-fix-fix mm/filemap_xip.c
diff -puN mm/memory.c~mm-fix-xip-fault-vs-truncate-race-fix-fix mm/memory.c
--- a/mm/memory.c~mm-fix-xip-fault-vs-truncate-race-fix-fix
+++ a/mm/memory.c
@@ -1327,11 +1327,6 @@ static void unmap_single_vma(struct mmu_
* safe to do nothing in this case.
*/
if (vma->vm_file) {
- /*
- * Note that DAX uses i_mmap_lock to serialise
- * against file truncate - truncate calls into
- * unmap_single_vma().
- */
i_mmap_lock_write(vma->vm_file->f_mapping);
__unmap_hugepage_range_final(tlb, vma, start, end, NULL);
i_mmap_unlock_write(vma->vm_file->f_mapping);
@@ -2390,6 +2385,7 @@ void unmap_mapping_range(struct address_
details.last_index = ULONG_MAX;
+ /* DAX uses i_mmap_lock to serialise file truncate vs page fault */
i_mmap_lock_write(mapping);
if (unlikely(!RB_EMPTY_ROOT(&mapping->i_mmap)))
unmap_mapping_range_tree(&mapping->i_mmap, &details);
_
Patches currently in -mm which might be from akpm@xxxxxxxxxxxxxxxxxxxx are
i-need-old-gcc.patch
arch-alpha-kernel-systblss-remove-debug-check.patch
fanotify-dont-recalculate-a-marks-mask-if-only-the-ignored-mask-changed-checkpatch-fixes.patch
fanotify-dont-set-fan_ondir-implicitly-on-a-marks-ignored-mask-checkpatch-fixes.patch
input-route-kbd-leds-through-the-generic-leds-layer.patch
o2dlm-fix-null-pointer-dereference-in-o2dlm_blocking_ast_wrapper.patch
ocfs2-add-functions-to-add-and-remove-inode-in-orphan-dir.patch
mm.patch
mm-fix-xip-fault-vs-truncate-race-fix.patch
mm-allow-page-fault-handlers-to-perform-the-cow-fix.patch
daxext2-replace-the-xip-page-fault-handler-with-the-dax-page-fault-handler-fix.patch
dax-add-dax_zero_page_range-fix.patch
mm-replace-remap_file_pages-syscall-with-emulation.patch
mm-page_allocc-__alloc_pages_nodemask-dont-alter-arg-gfp_mask.patch
mm-memcontrol-default-hierarchy-interface-for-memory-checkpatch-fixes.patch
x86-add-pmd_-for-thp-fix.patch
sparc-add-pmd_-for-thp-fix.patch
do_shared_fault-check-that-mmap_sem-is-held.patch
task_mmu-add-user-space-support-for-resetting-mm-hiwater_rss-peak-rss.patch
lib-bitmap-update-bitmap_onto-to-unsigned-checkpatch-fixes.patch
lib-bitmap-change-parameters-of-bitmap_fold-to-unsigned-fix.patch
hexdump-makes-it-return-amount-of-bytes-placed-in-buffer-fix.patch
fs-befs-linuxvfsc-remove-unnecessary-casting-fix.patch
linux-next.patch
drivers-gpio-gpio-zevioc-fix-build.patch
journal_add_journal_head-debug.patch
journal_add_journal_head-debug-fix.patch
kernel-forkc-export-kernel_thread-to-modules.patch
mutex-subsystem-synchro-test-module.patch
slab-leaks3-default-y.patch
mm-fix-xip-fault-vs-truncate-race-fix-fix.patch
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