From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id o3D6Pvag199516 for ; Tue, 13 Apr 2010 01:25:57 -0500 Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 4263C2BAC5E for ; Mon, 12 Apr 2010 23:27:51 -0700 (PDT) Received: from mail.internode.on.net (bld-mail12.adl6.internode.on.net [150.101.137.97]) by cuda.sgi.com with ESMTP id FZdjPlh33h1xsUzK for ; Mon, 12 Apr 2010 23:27:51 -0700 (PDT) From: Dave Chinner Subject: [PATCH 3/3] [PATCH] xfs: check for more work before sleeping in xfssyncd Date: Tue, 13 Apr 2010 16:27:32 +1000 Message-Id: <1271140052-15365-4-git-send-email-david@fromorbit.com> In-Reply-To: <1271140052-15365-1-git-send-email-david@fromorbit.com> References: <1271140052-15365-1-git-send-email-david@fromorbit.com> List-Id: XFS Filesystem from SGI List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: xfs-bounces@oss.sgi.com Errors-To: xfs-bounces@oss.sgi.com To: stable@kernel.org Cc: xfs@oss.sgi.com >>From 20f6b2c785cf187445f126321638ab8ba7aa7494 Thu, 4 Mar 2010 01:46:23 +0000 xfssyncd processes a queue of work by detaching the queue and then iterating over all the work items. It then sleeps for a time period or until new work comes in. If new work is queued while xfssyncd is actively processing the detached work queue, it will not process that new work until after a sleep timeout or the next work event queued wakes it. Fix this by checking the work queue again before going to sleep. Signed-off-by: Dave Chinner Signed-off-by: Christoph Hellwig Signed-off-by: Alex Elder --- fs/xfs/linux-2.6/xfs_sync.c | 6 +++--- 1 files changed, 3 insertions(+), 3 deletions(-) diff --git a/fs/xfs/linux-2.6/xfs_sync.c b/fs/xfs/linux-2.6/xfs_sync.c index 687e9fc..6b6b394 100644 --- a/fs/xfs/linux-2.6/xfs_sync.c +++ b/fs/xfs/linux-2.6/xfs_sync.c @@ -613,7 +613,8 @@ xfssyncd( set_freezable(); timeleft = xfs_syncd_centisecs * msecs_to_jiffies(10); for (;;) { - timeleft = schedule_timeout_interruptible(timeleft); + if (list_empty(&mp->m_sync_list)) + timeleft = schedule_timeout_interruptible(timeleft); /* swsusp */ try_to_freeze(); if (kthread_should_stop() && list_empty(&mp->m_sync_list)) @@ -633,8 +634,7 @@ xfssyncd( list_add_tail(&mp->m_sync_work.w_list, &mp->m_sync_list); } - list_for_each_entry_safe(work, n, &mp->m_sync_list, w_list) - list_move(&work->w_list, &tmp); + list_splice_init(&mp->m_sync_list, &tmp); spin_unlock(&mp->m_sync_lock); list_for_each_entry_safe(work, n, &tmp, w_list) { -- 1.6.5 _______________________________________________ xfs mailing list xfs@oss.sgi.com http://oss.sgi.com/mailman/listinfo/xfs