The patch titled
Subject: drivers/md/bcache/super.c: use kvmalloc
has been added to the -mm tree. Its filename is
bcache-use-kvmalloc.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/bcache-use-kvmalloc.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/bcache-use-kvmalloc.patch
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------------------------------------------------------
From: Michal Hocko <mhocko@xxxxxxxx>
Subject: drivers/md/bcache/super.c: use kvmalloc
bcache_device_init uses kmalloc for small requests and vmalloc for those
which are larger than 64 pages. This alone is a strange criterion.
Moreover kmalloc can fallback to vmalloc on the failure. Let's simply use
kvmalloc instead as it knows how to handle the fallback properly
Link: http://lkml.kernel.org/r/20170306103327.2766-5-mhocko@xxxxxxxxxx
Signed-off-by: Michal Hocko <mhocko@xxxxxxxx>
Acked-by: Vlastimil Babka <vbabka@xxxxxxx>
Cc: Kent Overstreet <kent.overstreet@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/md/bcache/super.c | 8 ++------
1 file changed, 2 insertions(+), 6 deletions(-)
diff -puN drivers/md/bcache/super.c~bcache-use-kvmalloc drivers/md/bcache/super.c
--- a/drivers/md/bcache/super.c~bcache-use-kvmalloc
+++ a/drivers/md/bcache/super.c
@@ -767,16 +767,12 @@ static int bcache_device_init(struct bca
}
n = d->nr_stripes * sizeof(atomic_t);
- d->stripe_sectors_dirty = n < PAGE_SIZE << 6
- ? kzalloc(n, GFP_KERNEL)
- : vzalloc(n);
+ d->stripe_sectors_dirty = kvzalloc(n, GFP_KERNEL);
if (!d->stripe_sectors_dirty)
return -ENOMEM;
n = BITS_TO_LONGS(d->nr_stripes) * sizeof(unsigned long);
- d->full_dirty_stripes = n < PAGE_SIZE << 6
- ? kzalloc(n, GFP_KERNEL)
- : vzalloc(n);
+ d->full_dirty_stripes = kvzalloc(n, GFP_KERNEL);
if (!d->full_dirty_stripes)
return -ENOMEM;
_
Patches currently in -mm which might be from mhocko@xxxxxxxx are
lockdep-allow-to-disable-reclaim-lockup-detection.patch
xfs-abstract-pf_fstrans-to-pf_memalloc_nofs.patch
mm-introduce-memalloc_nofs_saverestore-api.patch
xfs-use-memalloc_nofs_saverestore-instead-of-memalloc_noio.patch
jbd2-mark-the-transaction-context-with-the-scope-gfp_nofs-context.patch
jbd2-make-the-whole-kjournald2-kthread-nofs-safe.patch
mm-introduce-kvalloc-helpers.patch
mm-support-__gfp_repeat-in-kvmalloc_node-for-32kb.patch
rhashtable-simplify-a-strange-allocation-pattern.patch
ila-simplify-a-strange-allocation-pattern.patch
xattr-zero-out-memory-copied-to-userspace-in-getxattr.patch
treewide-use-kvalloc-rather-than-opencoded-variants.patch
net-use-kvmalloc-with-__gfp_repeat-rather-than-open-coded-variant.patch
md-use-kvmalloc-rather-than-opencoded-variant.patch
bcache-use-kvmalloc.patch
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