linux-kernel - [PATCH v3 2/4] fs/afs/rxrpc: Remove deprecated create_singlethread

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Date:   Sun, 4 Sep 2016 20:53:42 +0530
From:   Bhaktipriya Shridhar <bhaktipriya96@...il.com>
To:     David Howells <dhowells@...hat.com>
Cc:     linux-kernel@...r.kernel.org, linux-afs@...ts.infradead.org,
        Tejun Heo <tj@...nel.org>
Subject: [PATCH v3 2/4] fs/afs/rxrpc: Remove deprecated
 create_singlethread_workqueue

The workqueue "afs_async_calls" queues work item
&call->async_work per afs_call. Since there could be multiple calls and since
these calls can be run concurrently, alloc_workqueue has been used to replace
the deprecated create_singlethread_workqueue instance.

The WQ_MEM_RECLAIM flag has been set to ensure forward progress under
memory pressure because the workqueue is being used on a memory reclaim
path.

Since there are fixed number of work items, explicit concurrency
limit is unnecessary here.

Signed-off-by: Bhaktipriya Shridhar <bhaktipriya96@...il.com>
---
 Changes in v3:
	- Updated patch description

 fs/afs/rxrpc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/afs/rxrpc.c b/fs/afs/rxrpc.c
index 63cd9f9..4f9e9b3 100644
--- a/fs/afs/rxrpc.c
+++ b/fs/afs/rxrpc.c
@@ -85,7 +85,7 @@ int afs_open_socket(void)

 	skb_queue_head_init(&afs_incoming_calls);

-	afs_async_calls = create_singlethread_workqueue("kafsd");
+	afs_async_calls = alloc_workqueue("kafsd", WQ_MEM_RECLAIM, 0);
 	if (!afs_async_calls) {
 		_leave(" = -ENOMEM [wq]");
 		return -ENOMEM;
--
2.1.4