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: Jens Axboe <axboe@kernel.dk>
Cc: Martin K. Petersen <martin.petersen@oracle.com>
---
Only compile tested. Please feel free to take it into the subsystem
tree or simply ack - I'll route it through the wq tree.
Thanks.
fs/bio-integrity.c | 7 ++++++-
1 files changed, 6 insertions(+), 1 deletions(-)
diff --git a/fs/bio-integrity.c b/fs/bio-integrity.c
index 4d0ff5e..e49cce2 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");
--
1.7.1
--
