From: Jeffle Xu <jefflexu@linux.alibaba.com>
Date: Sat, 2 Apr 2022 10:32:50 +0000 (+0800)
Subject: fuse: avoid unnecessary spinlock bump
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=47e301491c4f52ca744c7660cf57492b902261f6;p=linux.git

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 10eb50cbf398c..e23e802a80130 100644
--- 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;
 }