[PATCH 24/32] dlm: dlm workqueues aren't used in memory reclaim path

From: Tejun Heo
Date: Mon Jan 03 2011 - 08:51:35 EST


dlm isn't depended upon during memory reclaim and so are its two
workqueues. Convert to alloc[_ordered]_workqueue() without
WQ_MEM_RECLAIM. While at it, fix workqueue allocation failure
handling. They return %NULL on failure not ERR_PTR() value.

Signed-off-by: Tejun Heo <tj@xxxxxxxxxx>
Cc: Christine Caulfield <ccaulfie@xxxxxxxxxx>
Cc: David Teigland <teigland@xxxxxxxxxx>
Cc: cluster-devel@xxxxxxxxxx
---
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/dlm/lowcomms.c | 19 ++++++++-----------
1 files changed, 8 insertions(+), 11 deletions(-)

diff --git a/fs/dlm/lowcomms.c b/fs/dlm/lowcomms.c
index 37a34c2..9aad7c0 100644
--- a/fs/dlm/lowcomms.c
+++ b/fs/dlm/lowcomms.c
@@ -1430,20 +1430,17 @@ static void work_stop(void)

static int work_start(void)
{
- int error;
- recv_workqueue = create_workqueue("dlm_recv");
- error = IS_ERR(recv_workqueue);
- if (error) {
- log_print("can't start dlm_recv %d", error);
- return error;
+ recv_workqueue = alloc_workqueue("dlm_recv", 0, 1);
+ if (!recv_workqueue) {
+ log_print("can't start dlm_recv");
+ return -ENOMEM;
}

- send_workqueue = create_singlethread_workqueue("dlm_send");
- error = IS_ERR(send_workqueue);
- if (error) {
- log_print("can't start dlm_send %d", error);
+ send_workqueue = alloc_ordered_workqueue("dlm_send", 0);
+ if (!send_workqueue) {
+ log_print("can't start dlm_send");
destroy_workqueue(recv_workqueue);
- return error;
+ return -ENOMEM;
}

return 0;
--
1.7.1

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