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authorChris Mason <clm@fb.com>2016-01-27 05:48:23 -0800
committerChris Mason <clm@fb.com>2016-01-27 05:48:23 -0800
commitd32a4e34348869a273a01139112a13fc6870f003 (patch)
tree507adf3bf14d2cafb38502c27ea8cc82b28cf11a /fs/btrfs/free-space-tree.c
parentbf6092066f80840410e3401cd962b23d54a95713 (diff)
parent3e4c5efbb3ac7c9c4fb5f33b659fa98afe568ab1 (diff)
Merge branch 'dev/fst-followup' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux into for-linus-4.5
Diffstat (limited to 'fs/btrfs/free-space-tree.c')
-rw-r--r--fs/btrfs/free-space-tree.c18
1 files changed, 16 insertions, 2 deletions
diff --git a/fs/btrfs/free-space-tree.c b/fs/btrfs/free-space-tree.c
index 94e887f5ec4e..dfa8124effb8 100644
--- a/fs/btrfs/free-space-tree.c
+++ b/fs/btrfs/free-space-tree.c
@@ -154,6 +154,20 @@ static inline u32 free_space_bitmap_size(u64 size, u32 sectorsize)
static unsigned long *alloc_bitmap(u32 bitmap_size)
{
+ void *mem;
+
+ /*
+ * The allocation size varies, observed numbers were < 4K up to 16K.
+ * Using vmalloc unconditionally would be too heavy, we'll try
+ * contiguous allocations first.
+ */
+ if (bitmap_size <= PAGE_SIZE)
+ return kzalloc(bitmap_size, GFP_NOFS);
+
+ mem = kzalloc(bitmap_size, GFP_NOFS | __GFP_HIGHMEM | __GFP_NOWARN);
+ if (mem)
+ return mem;
+
return __vmalloc(bitmap_size, GFP_NOFS | __GFP_HIGHMEM | __GFP_ZERO,
PAGE_KERNEL);
}
@@ -290,7 +304,7 @@ int convert_free_space_to_bitmaps(struct btrfs_trans_handle *trans,
ret = 0;
out:
- vfree(bitmap);
+ kvfree(bitmap);
if (ret)
btrfs_abort_transaction(trans, root, ret);
return ret;
@@ -439,7 +453,7 @@ int convert_free_space_to_extents(struct btrfs_trans_handle *trans,
ret = 0;
out:
- vfree(bitmap);
+ kvfree(bitmap);
if (ret)
btrfs_abort_transaction(trans, root, ret);
return ret;