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author | Chao Yu <chao2.yu@samsung.com> | 2015-02-11 18:20:38 +0800 |
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committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2015-02-11 17:04:51 -0800 |
commit | 1a118ccfd60fc78e64c0a3ab9e85075545839d6e (patch) | |
tree | e0cbaa9c068a063c71923a9b3a2c5d6168c70a6d /include/trace | |
parent | f1a3b98e73a9f811ab4882669043c50c0e0dc7b6 (diff) | |
download | linux-1a118ccfd60fc78e64c0a3ab9e85075545839d6e.tar.bz2 |
f2fs: use spinlock for segmap_lock instead of rwlock
rwlock can provide better concurrency when there are much more readers than
writers because readers can hold the rwlock simultaneously.
But now, for segmap_lock rwlock in struct free_segmap_info, there is only one
reader 'mount' from below call path:
->f2fs_fill_super
->build_segment_manager
->build_dirty_segmap
->init_dirty_segmap
->find_next_inuse
read_lock
...
read_unlock
Now that our concurrency can not be improved since there is no other reader for
this lock, we do not need to use rwlock_t type for segmap_lock, let's replace it
with spinlock_t type.
Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'include/trace')
0 files changed, 0 insertions, 0 deletions