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Subject[PATCH 22/32] ceph: fsc->*_wq's aren't used in memory reclaim path
Date
fsc->*_wq's aren't depended upon during memory reclaim.  Convert to
alloc_workqueue() w/o WQ_MEM_RECLAIM.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Sage Weil <sage@newdream.net>
Cc: ceph-devel@vger.kernel.org
---
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/ceph/super.c | 10 +++++++---
1 files changed, 7 insertions(+), 3 deletions(-)
diff --git a/fs/ceph/super.c b/fs/ceph/super.c
index 08b460a..1f6436e 100644
--- a/fs/ceph/super.c
+++ b/fs/ceph/super.c
@@ -443,13 +443,17 @@ struct ceph_fs_client *create_fs_client(struct ceph_mount_options *fsopt,
goto fail_client;

err = -ENOMEM;
- fsc->wb_wq = create_workqueue("ceph-writeback");
+ /*
+ * The number of concurrent works can be high but they don't need
+ * to be processed in parallel, limit concurrency.
+ */
+ fsc->wb_wq = alloc_workqueue("ceph-writeback", 0, 1);
if (fsc->wb_wq == NULL)
goto fail_bdi;
- fsc->pg_inv_wq = create_singlethread_workqueue("ceph-pg-invalid");
+ fsc->pg_inv_wq = alloc_workqueue("ceph-pg-invalid", 0, 1);
if (fsc->pg_inv_wq == NULL)
goto fail_wb_wq;
- fsc->trunc_wq = create_singlethread_workqueue("ceph-trunc");
+ fsc->trunc_wq = alloc_workqueue("ceph-trunc", 0, 1);
if (fsc->trunc_wq == NULL)
goto fail_pg_inv_wq;

--
1.7.1


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