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From: Joseph Qi <joseph.qi@huawei.com>
To: ocfs2-devel@oss.oracle.com
Subject: [Ocfs2-devel] [RFC] Doubt about dlm_worker
Date: Thu, 10 Sep 2015 19:49:45 +0800	[thread overview]
Message-ID: <55F16E59.8070006@huawei.com> (raw)
In-Reply-To: <55EC3B99.7040601@huawei.com>

Hi Junxiao & Sunil,
Your comments would be appreciated.

Thanks,
Joseph

On 2015/9/6 21:11, Joseph Qi wrote:
> Comments for dlm_dispatch_work is described below:
> /* Worker function used during recovery. */
> 
> But actually dlm_worker is used by 4 types of dlm message workers:
> 	dlm_assert_master_worker
> 	dlm_deref_lockres_worker
> 	dlm_request_all_locks_worker
> 	dlm_mig_lockres_worker
> 
> And the first 2 are not dlm recovery related. Moreover, it will send
> DLM_ASSERT_MASTER_MSG to all other nodes in dlm_assert_master_worker.
> And it may do a lot of assert master during recovery. In our scenario,
> it is tens of thousands.
> This will delay the recovery because dlm_worker is a single thread
> workqueue and cluster is hanging during dlm recovery.
> So I doubt if we can move the assert master to a new workqueue or just
> use a system workqueue.
> Any suggestions?
> 
> 
> _______________________________________________
> Ocfs2-devel mailing list
> Ocfs2-devel at oss.oracle.com
> https://oss.oracle.com/mailman/listinfo/ocfs2-devel
> 
> 

  reply	other threads:[~2015-09-10 11:49 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-09-06 13:11 [Ocfs2-devel] [RFC] Doubt about dlm_worker Joseph Qi
2015-09-10 11:49 ` Joseph Qi [this message]
2015-09-10 19:18   ` Sunil Mushran
2015-09-11  2:19   ` Junxiao Bi

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