diff options
| author | Kirill Tkhai <ktkhai@virtuozzo.com> | 2018-08-27 18:29:46 +0300 |
|---|---|---|
| committer | Miklos Szeredi <mszeredi@redhat.com> | 2018-09-28 16:43:22 +0200 |
| commit | ae2dffa39485c6fd4f22321814c7287c274b473a (patch) | |
| tree | ae65ad5f3ac4f02fb9f7ba8b7fce89cac5d565bf /fs/fuse/inode.c | |
| parent | 2b30a533148af4f3865c0dcd619ad93ab3f4ba52 (diff) | |
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/inode.c')
| -rw-r--r-- | fs/fuse/inode.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c index db9e60b7eb69..ed3f49628ce2 100644 --- a/fs/fuse/inode.c +++ b/fs/fuse/inode.c @@ -605,6 +605,7 @@ void fuse_conn_init(struct fuse_conn *fc, struct user_namespace *user_ns) { memset(fc, 0, sizeof(*fc)); spin_lock_init(&fc->lock); + spin_lock_init(&fc->bg_lock); init_rwsem(&fc->killsb); refcount_set(&fc->count, 1); atomic_set(&fc->dev_count, 1); @@ -852,6 +853,7 @@ static void process_init_limits(struct fuse_conn *fc, struct fuse_init_out *arg) sanitize_global_limit(&max_user_bgreq); sanitize_global_limit(&max_user_congthresh); + spin_lock(&fc->bg_lock); if (arg->max_background) { fc->max_background = arg->max_background; @@ -865,6 +867,7 @@ static void process_init_limits(struct fuse_conn *fc, struct fuse_init_out *arg) fc->congestion_threshold > max_user_congthresh) fc->congestion_threshold = max_user_congthresh; } + spin_unlock(&fc->bg_lock); } static void process_init_reply(struct fuse_conn *fc, struct fuse_req *req) |