[PATCH v3 4/4] NFS: Set WQ_SYSFS on nfsiod

[Chuck Lever <cel@kernel.org>]

An unbound workqueue's attributes can be changed at run time only
through /sys/devices/virtual/workqueue/, and a workqueue appears
there only when it is created with WQ_SYSFS. nfsiod is created
without it, so its affinity scope cannot be tuned without reloading
the nfs module.

Create nfsiod with WQ_SYSFS.

Signed-off-by: Chuck Lever <cel@kernel.org>
---
 fs/nfs/inode.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index 3022454f7698..107a2135029d 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -2619,7 +2619,8 @@ static void nfsiod_stop(void)
 static int nfsiod_start(void)
 {
 	dprintk("RPC:       creating workqueue nfsiod\n");
-	nfsiod_workqueue = alloc_workqueue("nfsiod", WQ_MEM_RECLAIM | WQ_UNBOUND, 0);
+	nfsiod_workqueue = alloc_workqueue("nfsiod",
+				WQ_MEM_RECLAIM | WQ_UNBOUND | WQ_SYSFS, 0);
 	if (nfsiod_workqueue == NULL)
 		return -ENOMEM;
 #if IS_ENABLED(CONFIG_NFS_LOCALIO)

-- 
2.54.0