fuse: avoid unnecessary spinlock bump

Move dmap free worker kicker inside the critical region, so that extra
spinlock lock/unlock could be avoided.

Suggested-by: Liu Jiang <gerry@linux.alibaba.com>
Signed-off-by: Jeffle Xu <jefflexu@linux.alibaba.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>

diff --git a/fs/fuse/dax.c b/fs/fuse/dax.c
index 10eb50cbf398c4b0e58ac3fe7e8d110e77f31036..e23e802a80130af9d007e36e47b446105a65c410 100644 (file)
--- a/fs/fuse/dax.c
+++ b/fs/fuse/dax.c
@@ -138,9 +138,9 @@ static struct fuse_dax_mapping *alloc_dax_mapping(struct fuse_conn_dax *fcd)
                WARN_ON(fcd->nr_free_ranges <= 0);
                fcd->nr_free_ranges--;
        }
+       __kick_dmap_free_worker(fcd, 0);
        spin_unlock(&fcd->lock);
 
-       kick_dmap_free_worker(fcd, 0);
        return dmap;
 }