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| author | Josef Bacik <josef@redhat.com> | 2011-01-25 22:30:38 +0100 |
|---|---|---|
| committer | Josef Bacik <josef@redhat.com> | 2011-03-17 19:21:18 +0100 |
| commit | 57a45ced94fe48a701361d64230fc16eefa189dd (patch) | |
| tree | 8f0cfe52ba0b3fb8a6ed3cc5d3e7449369b0b9a5 /fs/stat.c | |
| parent | Btrfs: fix how we deal with the pages array in the write path (diff) | |
| download | linux-57a45ced94fe48a701361d64230fc16eefa189dd.tar.xz linux-57a45ced94fe48a701361d64230fc16eefa189dd.zip | |
Btrfs: change reserved_extents to an atomic_t
We track delayed allocation per inodes via 2 counters, one is
outstanding_extents and reserved_extents. Outstanding_extents is already an
atomic_t, but reserved_extents is not and is protected by a spinlock. So
convert this to an atomic_t and instead of using a spinlock, use atomic_cmpxchg
when releasing delalloc bytes. This makes our inode 72 bytes smaller, and
reduces locking overhead (albiet it was minimal to begin with). Thanks,
Signed-off-by: Josef Bacik <josef@redhat.com>
Diffstat (limited to 'fs/stat.c')
0 files changed, 0 insertions, 0 deletions