bio-integrity: mark kintegrityd_wq highpri and CPU intensive

Work items processed by kintegrityd_wq won't block much, may burn a
lot of CPU cycles and affect IO latency.  Use alloc_workqueue() to
mark it highpri and CPU intensive with max concurrency of 1.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>

1 files changed, 6 insertions, 1 deletions

diff --git a/fs/bio-integrity.c b/fs/bio-integrity.c
index 4d0ff5ee27b8..e49cce234c65 100644
--- a/fs/bio-integrity.c
+++ b/fs/bio-integrity.c
@@ -782,7 +782,12 @@ void __init bio_integrity_init(void)
 {
         unsigned int i;
 
-        kintegrityd_wq = create_workqueue("kintegrityd");
+        /*
+         * kintegrityd won't block much but may burn a lot of CPU cycles.
+         * Make it highpri CPU intensive wq with max concurrency of 1.
+         */
+        kintegrityd_wq = alloc_workqueue("kintegrityd", WQ_MEM_RECLAIM |
+                                         WQ_HIGHPRI | WQ_CPU_INTENSIVE, 1);
         if (!kintegrityd_wq)
                 panic("Failed to create kintegrityd\n");