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Btrfs: correctly set profile flags on seqlock retry

Message ID 1398348929-1827-2-git-send-email-fdmanana@gmail.com (mailing list archive)
State Accepted
Headers show

Commit Message

Filipe Manana April 24, 2014, 2:15 p.m. UTC 
If we had to retry on the profiles seqlock (due to a concurrent write), we
would set bits on the input flags that corresponded both to the current
profile and to previous values of the profile.

Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com>
---
 fs/btrfs/extent-tree.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)
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Patch

diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 678cb35..5590af9 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -3543,11 +3543,13 @@  static u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags)
 	return extended_to_chunk(flags | tmp);
 }
 
-static u64 get_alloc_profile(struct btrfs_root *root, u64 flags)
+static u64 get_alloc_profile(struct btrfs_root *root, u64 orig_flags)
 {
 	unsigned seq;
+	u64 flags;
 
 	do {
+		flags = orig_flags;
 		seq = read_seqbegin(&root->fs_info->profiles_lock);
 
 		if (flags & BTRFS_BLOCK_GROUP_DATA)