[Virtio-fs] [PATCH 2/2] virtiofs: reduce lock contention on fpq->lock

[Jeffle Xu]

From: Liu Bo <bo.liu at linux.alibaba.com>

Since %req has been removed from fpq->processing_list, no one except
request_wait_answer() is looking at this %req and request_wait_answer()
waits only on FINISH flag, it's OK to remove fpq->lock after %req is
dropped from the list.

Signed-off-by: Liu Bo <bo.liu at linux.alibaba.com>
Signed-off-by: Jeffle Xu <jefflexu at linux.alibaba.com>
---
 fs/fuse/virtio_fs.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/fs/fuse/virtio_fs.c b/fs/fuse/virtio_fs.c
index 0050132e2787..7dbf5502c57e 100644
--- a/fs/fuse/virtio_fs.c
+++ b/fs/fuse/virtio_fs.c
@@ -557,7 +557,6 @@ static void copy_args_from_argbuf(struct fuse_args *args, struct fuse_req *req)
 static void virtio_fs_request_complete(struct fuse_req *req,
 				       struct virtio_fs_vq *fsvq)
 {
-	struct fuse_pqueue *fpq = &fsvq->fud->pq;
 	struct fuse_args *args;
 	struct fuse_args_pages *ap;
 	unsigned int len, i, thislen;
@@ -586,9 +585,7 @@ static void virtio_fs_request_complete(struct fuse_req *req,
 		}
 	}
 
-	spin_lock(&fpq->lock);
 	clear_bit(FR_SENT, &req->flags);
-	spin_unlock(&fpq->lock);
 
 	fuse_request_end(req);
 	spin_lock(&fsvq->lock);
-- 
2.27.0