linux-ext4 - Re: [bug report] e2fsck: The process is deadlocked

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Message-ID: <f56b7a5e-4c37-bbdb-5949-e6b18e0f0713@huawei.com>
Date:   Thu, 10 Nov 2022 11:39:35 +0800
From:   zhanchengbin <zhanchengbin1@...wei.com>
To:     Theodore Ts'o <tytso@....edu>
CC:     <linux-ext4@...r.kernel.org>, linfeilong <linfeilong@...wei.com>,
        <liuzhiqiang26@...wei.com>
Subject: Re: [bug report] e2fsck: The process is deadlocked

Version is 1.46.4, I think whether to try to release the mutex lock
in the ext2fs_close_free, such as CACHE_MTX,BOUNCE_MTX,STATS_MTX. But
you need to decide if it's the device you're checking, because I've
checked everyplace where ext2fs_close_free is called, in addition to
the call in the program end and exception branch, it is also called
when the journal device is close.

Reliable reproducer is in attachment.

  -zhanchengbin.

On 2022/11/9 23:43, Theodore Ts'o wrote:
> On Wed, Nov 09, 2022 at 06:40:31PM +0800, zhanchengbin wrote:
>> Hi Tytso,
>> The process is deadlocked, and an I/O error occurs when logs
>> are replayed. Because in the I/O error handling function, I/O
>> is sent again and catch the mutexlock.
> 
> What version of e2fsprogs are you using, and do you have a reliable
> reproducer?
> 
> Thanks,
> 
> 					- Ted
> 
> .
> 
View attachment "test.sh" of type "text/plain" (2072 bytes)