linux-kernel - [PATCH v2 1/4] fs/ocfs2/dlmfs: Remove deprecated create_singlethread

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Message-ID: <9748136d3a3b18138ad1d6ba708367aa1fe9f98c.1472590094.git.bhaktipriya96@gmail.com>
Date:   Wed, 31 Aug 2016 02:19:40 +0530
From:   Bhaktipriya Shridhar <bhaktipriya96@...il.com>
To:     Mark Fasheh <mfasheh@...e.com>, Joel Becker <jlbec@...lplan.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Joseph Qi <joseph.qi@...wei.com>,
        xuejiufei <xuejiufei@...wei.com>,
        "Norton.Zhu" <norton.zhu@...wei.com>,
        Jun Piao <piaojun@...wei.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Michal Hocko <mhocko@...e.com>,
        Vladimir Davydov <vdavydov@...tuozzo.com>,
        Johannes Weiner <hannes@...xchg.org>,
        "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
Cc:     ocfs2-devel@....oracle.com, linux-kernel@...r.kernel.org,
        Tejun Heo <tj@...nel.org>
Subject: [PATCH v2 1/4] fs/ocfs2/dlmfs: Remove deprecated
 create_singlethread_workqueue

The workqueue "user_dlm_worker" queues a single work item
&lockres->l_work per user_lock_res instance and hence it doesn't require
execution ordering. Hence, 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.

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

Signed-off-by: Bhaktipriya Shridhar <bhaktipriya96@...il.com>
---
 fs/ocfs2/dlmfs/dlmfs.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/ocfs2/dlmfs/dlmfs.c b/fs/ocfs2/dlmfs/dlmfs.c
index 47b3b2d..afe6e10 100644
--- a/fs/ocfs2/dlmfs/dlmfs.c
+++ b/fs/ocfs2/dlmfs/dlmfs.c
@@ -646,7 +646,7 @@ static int __init init_dlmfs_fs(void)
 	}
 	cleanup_inode = 1;

-	user_dlm_worker = create_singlethread_workqueue("user_dlm");
+	user_dlm_worker = alloc_workqueue("user_dlm", WQ_MEM_RECLAIM, 0);
 	if (!user_dlm_worker) {
 		status = -ENOMEM;
 		goto bail;
--
2.1.4