The patch titled
Subject: dax: Use vmf->gfp_mask
has been added to the -mm tree. Its filename is
dax-use-vmf-gfp_mask.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/dax-use-vmf-gfp_mask.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/dax-use-vmf-gfp_mask.patch
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------------------------------------------------------
From: Matthew Wilcox <willy@xxxxxxxxxxxxxxx>
Subject: dax: Use vmf->gfp_mask
We were assuming that it was OK to do a GFP_KERNEL allocation in page
fault context. That appears to be largely true, but filesystems are
permitted to override that in their setting of mapping->gfp_flags, which
the VM then massages into vmf->gfp_flags. No practical difference for
now, but there may come a day when we would have surprised a filesystem.
Signed-off-by: Matthew Wilcox <willy@xxxxxxxxxxxxxxx>
Reviewed-by: Ross Zwisler <ross.zwisler@xxxxxxxxxxxxxxx>
Cc: Dave Chinner <david@xxxxxxxxxxxxx>
Cc: Jan Kara <jack@xxxxxxx>
Cc: Theodore Ts'o <tytso@xxxxxxx>
Cc: Dan Williams <dan.j.williams@xxxxxxxxx>
Cc: "Kirill A. Shutemov" <kirill@xxxxxxxxxxxxx>
Cc: David Rientjes <rientjes@xxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: "H. Peter Anvin" <hpa@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/dax.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN fs/dax.c~dax-use-vmf-gfp_mask fs/dax.c
--- a/fs/dax.c~dax-use-vmf-gfp_mask
+++ a/fs/dax.c
@@ -316,7 +316,7 @@ static int dax_load_hole(struct address_
struct inode *inode = mapping->host;
if (!page)
page = find_or_create_page(mapping, vmf->pgoff,
- GFP_KERNEL | __GFP_ZERO);
+ vmf->gfp_mask | __GFP_ZERO);
if (!page)
return VM_FAULT_OOM;
/* Recheck i_size under page lock to avoid truncate race */
_
Patches currently in -mm which might be from willy@xxxxxxxxxxxxxxx are
mmdebug-always-evaluate-the-arguments-to-vm_bug_on_.patch
mm-convert-an-open-coded-vm_bug_on_vma.patch
mmfsdax-change-pmd_fault-to-huge_fault.patch
mm-add-support-for-pud-sized-transparent-hugepages.patch
mincore-add-support-for-puds.patch
procfs-add-support-for-puds-to-smaps-clear_refs-and-pagemap.patch
x86-unify-native__get_and_clear-smp-case.patch
x86-fix-whitespace-issues.patch
x86-add-support-for-pud-sized-transparent-hugepages.patch
dax-support-for-transparent-pud-pages.patch
ext4-support-for-pud-sized-transparent-huge-pages.patch
dax-use-vmf-gfp_mask.patch
dax-remove-unnecessary-rechecking-of-i_size.patch
dax-use-vmf-pgoff-in-fault-handlers.patch
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