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From: Junxiao Bi <junxiao.bi@oracle.com>
To: ocfs2-devel@oss.oracle.com
Subject: [Ocfs2-devel] [PATCH] add OCFS2_LOCK_IGNORE_BLOCKED arg_flags to ocfs2_cluster_lock() to prevent hang
Date: Wed, 6 Jan 2016 12:47:40 +0800	[thread overview]
Message-ID: <568C9C6C.2030506@oracle.com> (raw)
In-Reply-To: <20160105234715.GP29804@ZenIV.linux.org.uk>

Hi Joel,

On 01/06/2016 07:47 AM, Joel Becker wrote:
> On Tue, Jan 05, 2016 at 09:46:49AM +0800, Junxiao Bi wrote:
>> Hi Mark,
>>
>> We may fix this issue in another way, without recursive locking and
>> without refactoring. We can check before asking for the second locking,
>> if lock is already hold, then skip the second locking, do you agree
>> fixing like this?
> 
> Hey Junxiao,
> 
> What is to prevent the second lock from being dropped while in the
> middle of the operation?
Log processes id into lockres when lock is got. When do second locking,
if this lock is already got by this process, then skip it.

Thanks,
Junxiao.

> 
> Joel
> 

      reply	other threads:[~2016-01-06  4:47 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-12-22 23:55 [Ocfs2-devel] [PATCH] add OCFS2_LOCK_IGNORE_BLOCKED arg_flags to ocfs2_cluster_lock() to prevent hang Tariq Saeed
2015-12-30  0:34 ` Mark Fasheh
2016-01-04 20:57   ` Tariq Saeed
2016-01-05  0:35     ` Mark Fasheh
2016-01-05  1:46       ` Junxiao Bi
2016-01-05 23:47         ` Joel Becker
2016-01-06  4:47           ` Junxiao Bi [this message]

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