From mboxrd@z Thu Jan  1 00:00:00 1970
From: jianchao.w.wang@oracle.com (jianchao.wang)
Date: Wed, 2 May 2018 13:16:46 +0800
Subject: [PATCH V2 1/5] block: introduce blk_quiesce_timeout() and
 blk_unquiesce_timeout()
In-Reply-To: <20180502033342.GD22363@ming.t460p>
References: <20180429154152.16656-1-ming.lei@redhat.com>
 <20180429154152.16656-2-ming.lei@redhat.com>
 <93c4190f-178a-a3b4-5203-bd8c6a0eaef2@oracle.com>
 <20180502033342.GD22363@ming.t460p>
Message-ID: <81dd6a4b-c27c-d39e-cccf-68a0ff3d1711@oracle.com>

Hi Ming

On 05/02/2018 11:33 AM, Ming Lei wrote:
> No, there isn't such race, the 'mod_timer' doesn't make a difference
> because 'q->timeout_off' will be visible in new work func after
> cancel_work_sync() returns. So even the timer is expired, work func
> still returns immediately.

Yes, you are right.
even if timer is setup , but the timeout work will return.

Thanks
Jianchao