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From: Amerigo Wang <amwang@redhat.com>
To: Miklos Szeredi <mszeredi@suse.cz>
Cc: Andrew Morton <akpm@linux-foundation.org>,
	linux-kernel@vger.kernel.org, heiko.carstens@de.ibm.com,
	linux-fsdevel@vger.kernel.org, viro@zeniv.linux.org.uk
Subject: Re: [Patch] pipe: use file_update_time() when hold i_mutex
Date: Wed, 22 Jul 2009 17:21:50 +0800	[thread overview]
Message-ID: <4A66DA2E.90601@redhat.com> (raw)
In-Reply-To: <1248174580.28516.595.camel@tucsk>

Miklos Szeredi wrote:
> On Tue, 2009-07-21 at 18:07 +0800, Amerigo Wang wrote:
>   
>> Andrew Morton wrote:
>>     
>>> On Mon, 6 Jul 2009 01:35:30 -0400
>>> Amerigo Wang <amwang@redhat.com> wrote:
>>>
>>>   
>>>       
>>>> file_update_time() should be called with i_mutex held,
>>>> move it before mutex_unlock().
>>>>
>>>>     
>>>>         
>>> Why do you believe that file_update_time() needs i_mutex?
>>>   
>>>       
>> file_update_time() modifies inode, no? :)
>>     
>
> So does touch_atime(), yet neither needs i_mutex.
>   
Yes?

Then how the inode is protected when file_update_time() modifies
it?

Thanks.


  reply	other threads:[~2009-07-22  9:19 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-07-06  5:35 [Patch] pipe: use file_update_time() when hold i_mutex Amerigo Wang
2009-07-20 21:11 ` Andrew Morton
2009-07-21 10:07   ` Amerigo Wang
2009-07-21 11:09     ` Miklos Szeredi
2009-07-22  9:21       ` Amerigo Wang [this message]
2009-08-03 16:58         ` Miklos Szeredi

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