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path: root/fs/btrfs/free-space-tree.c
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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 393e36bd5845..53dbeaf6ce94 100644
--- a/fs/btrfs/free-space-tree.c
+++ b/fs/btrfs/free-space-tree.c
@@ -153,6 +153,20 @@ 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_NOWARN);
+ if (mem)
+ return mem;
+
return __vmalloc(bitmap_size, GFP_NOFS | __GFP_HIGHMEM | __GFP_ZERO,
PAGE_KERNEL);
}
@@ -289,7 +303,7 @@ 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;
@@ -438,7 +452,7 @@ 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;