Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
Message-ID: <06a7f382-5eaa-9489-3c28-aa4bfb804327@gmail.com>
Date:   Mon, 17 Oct 2022 09:51:14 +0800
MIME-Version: 1.0
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:102.0)
 Gecko/20100101 Thunderbird/102.3.3
Subject: Re: [Ocfs2-devel] [PATCH] ocfs2: reflink deadlock when clone file to
 the same directory simultaneously
To:     Andrew Morton <akpm@linux-foundation.org>, Gang He <ghe@suse.com>
Cc:     linux-kernel@vger.kernel.org, ocfs2-devel@oss.oracle.com
References: <20210729110230.18983-1-ghe@suse.com>
 <5821fd0f-2018-dc1b-a5c0-f948a7debff4@linux.alibaba.com>
 <c7e1f0a7-e75c-d1e0-870d-dc480d070079@suse.com>
 <71608a14-58f4-dba0-d695-fee65de89192@linux.alibaba.com>
 <801438f5-655a-c708-aa25-343d54a2f11e@suse.com>
 <86e3d724-3147-ccaa-998f-0f857c575f7e@linux.alibaba.com>
 <a0a9710f-461a-99c8-92f6-a99bb11b3a4e@suse.com>
 <4ba3b404-824b-90a3-ef43-9ab6510ee073@linux.alibaba.com>
 <5a1af56c-3eab-5baf-62a3-1c98bac104ba@suse.com>
 <db7119a5-f120-cebe-42a1-dc2f64db620d@suse.com>
 <20221016162950.09db2b5f503ac87823cd1687@linux-foundation.org>
Content-Language: en-US
From:   Joseph Qi <jiangqi903@gmail.com>
In-Reply-To: <20221016162950.09db2b5f503ac87823cd1687@linux-foundation.org>
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 7bit
Precedence: bulk

Hi Andrew,

On 10/17/22 7:29 AM, Andrew Morton via Ocfs2-devel wrote:
> On Thu, 26 Aug 2021 13:56:16 +0800 Gang He <ghe@suse.com> wrote:
> 
>> So, I will send a new patch to fix this deadlock problem via dlmglue layer.
>> For this patch, I want to change the patch comments as a reflink 
>> improvement patch.
> 
> Did this ever happen?  I've been sitting on this patch for ages.
> 
Looked back this thread, the root cause of deadlock seems to be the
asynchronous of fsdlm handling. So this is not a right fix.
While for the performance improvement, I need some test data as well.

Thanks,
Joseph