diff options
| author | Kirill Tkhai | 2018-08-27 17:29:46 +0200 |
|---|---|---|
| committer | Miklos Szeredi | 2018-09-28 16:43:22 +0200 |
| commit | ae2dffa39485c6fd4f22321814c7287c274b473a (patch) | |
| tree | ae65ad5f3ac4f02fb9f7ba8b7fce89cac5d565bf /fs/fuse/control.c | |
| parent | fuse: add locking to max_background and congestion_threshold changes (diff) | |
| download | kernel-qcow2-linux-ae2dffa39485c6fd4f22321814c7287c274b473a.tar.gz kernel-qcow2-linux-ae2dffa39485c6fd4f22321814c7287c274b473a.tar.xz kernel-qcow2-linux-ae2dffa39485c6fd4f22321814c7287c274b473a.zip | |
fuse: introduce fc->bg_lock
To reduce contention of fc->lock, this patch introduces bg_lock for
protection of fields related to background queue. These are:
max_background, congestion_threshold, num_background, active_background,
bg_queue and blocked.
This allows next patch to make async reads not requiring fc->lock, so async
reads and writes will have better performance executed in parallel.
Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Diffstat (limited to 'fs/fuse/control.c')
| -rw-r--r-- | fs/fuse/control.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/fs/fuse/control.c b/fs/fuse/control.c index eaa0e2b21623..989df5accaee 100644 --- a/fs/fuse/control.c +++ b/fs/fuse/control.c @@ -125,12 +125,12 @@ static ssize_t fuse_conn_max_background_write(struct file *file, if (ret > 0) { struct fuse_conn *fc = fuse_ctl_file_conn_get(file); if (fc) { - spin_lock(&fc->lock); + spin_lock(&fc->bg_lock); fc->max_background = val; fc->blocked = fc->num_background >= fc->max_background; if (!fc->blocked) wake_up(&fc->blocked_waitq); - spin_unlock(&fc->lock); + spin_unlock(&fc->bg_lock); fuse_conn_put(fc); } } @@ -171,7 +171,7 @@ static ssize_t fuse_conn_congestion_threshold_write(struct file *file, if (!fc) goto out; - spin_lock(&fc->lock); + spin_lock(&fc->bg_lock); fc->congestion_threshold = val; if (fc->sb) { if (fc->num_background < fc->congestion_threshold) { @@ -182,7 +182,7 @@ static ssize_t fuse_conn_congestion_threshold_write(struct file *file, set_bdi_congested(fc->sb->s_bdi, BLK_RW_ASYNC); } } - spin_unlock(&fc->lock); + spin_unlock(&fc->bg_lock); fuse_conn_put(fc); out: return ret; |