The patch titled
Subject: hugetlbfs: stop setting VM_DONTDUMP in initializing vma(VM_HUGETLB)
has been added to the -mm tree. Its filename is
hugetlbfs-stop-setting-vm_dontdump-in-initializing-vmavm_hugetlb.patch
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------------------------------------------------------
From: Naoya Horiguchi <n-horiguchi@xxxxxxxxxxxxx>
Subject: hugetlbfs: stop setting VM_DONTDUMP in initializing vma(VM_HUGETLB)
Currently we fail to include any data on hugepages into coredump, because
VM_DONTDUMP is set on hugetlbfs's vma. This behavior was recently
introduced by commit 314e51b98 "mm: kill vma flag VM_RESERVED and
mm->reserved_vm counter". This looks to me a serious regression, so let's
fix it.
Signed-off-by: Naoya Horiguchi <n-horiguchi@xxxxxxxxxxxxx>
Acked-by: Konstantin Khlebnikov <khlebnikov@xxxxxxxxxx>
Acked-by: Michal Hocko <mhocko@xxxxxxx>
Reviewed-by: Rik van Riel <riel@xxxxxxxxxx>
Acked-by: KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxxxxxxx>
Acked-by: David Rientjes <rientjes@xxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx> [3.7+]
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/hugetlbfs/inode.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN fs/hugetlbfs/inode.c~hugetlbfs-stop-setting-vm_dontdump-in-initializing-vmavm_hugetlb fs/hugetlbfs/inode.c
--- a/fs/hugetlbfs/inode.c~hugetlbfs-stop-setting-vm_dontdump-in-initializing-vmavm_hugetlb
+++ a/fs/hugetlbfs/inode.c
@@ -110,7 +110,7 @@ static int hugetlbfs_file_mmap(struct fi
* way when do_mmap_pgoff unwinds (may be important on powerpc
* and ia64).
*/
- vma->vm_flags |= VM_HUGETLB | VM_DONTEXPAND | VM_DONTDUMP;
+ vma->vm_flags |= VM_HUGETLB | VM_DONTEXPAND;
vma->vm_ops = &hugetlb_vm_ops;
if (vma->vm_pgoff & (~huge_page_mask(h) >> PAGE_SHIFT))
_
Patches currently in -mm which might be from n-horiguchi@xxxxxxxxxxxxx are
hugetlbfs-stop-setting-vm_dontdump-in-initializing-vmavm_hugetlb.patch
fix-hugetlb-memory-check-in-vma_dump_size.patch
hugetlbfs-add-swap-entry-check-in-follow_hugetlb_page.patch
hwpoison-check-dirty-flag-to-match-against-clean-page.patch
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