[Ocfs2-devel] ocfs2: o2hb: not fence self if storage down

From: Junxiao Bi <junxiao.bi@oracle.com>
To: ocfs2-devel@oss.oracle.com
Subject: [Ocfs2-devel] ocfs2: o2hb: not fence self if storage down
Date: Thu, 21 Jan 2016 16:41:29 +0800	[thread overview]
Message-ID: <56A099B9.8010600@oracle.com> (raw)
In-Reply-To: <20160121163403031308148@126.com>

On 01/21/2016 04:34 PM, rwxybh wrote:
> Hi, junxiao!
> 
> 
> We can't find correct fencing log after a node fencing itself. 
> We know there is log such as following in source code:
> 
> printk(KERN_ERR "*** ocfs2 is very sorry to be fencing this "
>       "system by restarting ***\n");
> 
> But we NEVER found this message from /var/log/message or last "demsg".
> 
> Do u mean we can find this message from local fs log after applying this
> patch set?
No, this patch is not targeted to do that. This patch set is to avoid
nodes fence self if storage down.
To get that log, i am afraid you need configure a console as panic
follows that printk.

Thanks,
Junxiao.
> 
> Or any way to find this output (without netconsole), thx?
> 
> ------------------------------------------------------------------------
> rwxybh
> 
>      
>     *From:* Junxiao Bi <mailto:junxiao.bi@oracle.com>
>     *Date:* 2016-01-20 11:13
>     *To:* ocfs2-devel <mailto:ocfs2-devel@oss.oracle.com>
>     *CC:* mfasheh <mailto:mfasheh@suse.com>
>     *Subject:* [Ocfs2-devel] ocfs2: o2hb: not fence self if storage down
>     Hi,
>      
>     This serial of patches is to fix the issue that when storage down,
>     all nodes will fence self due to write timeout.
>     With this patch set, all nodes will keep going until storage back
>     online, except if the following issue happens, then all nodes will
>     do as before to fence self.
>     1. io error got
>     2. network between nodes down
>     3. nodes panic
>      
>     Junxiao Bi (6):
>           ocfs2: o2hb: add negotiate timer
>           ocfs2: o2hb: add NEGO_TIMEOUT message
>           ocfs2: o2hb: add NEGOTIATE_APPROVE message
>           ocfs2: o2hb: add some user/debug log
>           ocfs2: o2hb: don't negotiate if last hb fail
>           ocfs2: o2hb: fix hb hung time
>      
>     fs/ocfs2/cluster/heartbeat.c |  181
>     ++++++++++++++++++++++++++++++++++++++++--
>     1 file changed, 175 insertions(+), 6 deletions(-)
>      
>     Thanks,
>     Junxiao.
>      
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