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| author | Nikolay Borisov <nborisov@suse.com> | 2017-05-11 09:17:46 +0300 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2017-06-19 18:25:58 +0200 |
| commit | a5ed45f8224f2c7e4ad5a9673cb50e8e3128bd88 (patch) | |
| tree | 0fe59f8adb887bfab495948f2d7278c16daea491 /fs/btrfs/extent-tree.c | |
| parent | 401b41e5a85a635fd9888ba8969c5006a5dbd399 (diff) | |
| download | linux-stable-a5ed45f8224f2c7e4ad5a9673cb50e8e3128bd88.tar.gz linux-stable-a5ed45f8224f2c7e4ad5a9673cb50e8e3128bd88.tar.bz2 linux-stable-a5ed45f8224f2c7e4ad5a9673cb50e8e3128bd88.zip | |
btrfs: Convert fs_info->free_chunk_space to atomic64_t
The ->free_chunk_space variable is used to track the unallocated space
and access to it is protected by a spinlock, which is not used for
anything else. Make the code a bit self-explanatory by switching the
variable to an atomic64_t type and kill the spinlock.
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
[ not a performance critical code, use of atomic type is ok ]
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/extent-tree.c')
| -rw-r--r-- | fs/btrfs/extent-tree.c | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index 33d979e9ea2a..4c0d3980fe3f 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -4646,9 +4646,7 @@ static int can_overcommit(struct btrfs_root *root, used += space_info->bytes_may_use; - spin_lock(&fs_info->free_chunk_lock); - avail = fs_info->free_chunk_space; - spin_unlock(&fs_info->free_chunk_lock); + avail = atomic64_read(&fs_info->free_chunk_space); /* * If we have dup, raid1 or raid10 then only half of the free |