linux-ext4 - Re: More ext4 acl/xattr corruption

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Message-ID: <20090519150430.GC7927@mit.edu>
Date:	Tue, 19 May 2009 11:04:30 -0400
From:	Theodore Tso <tytso@....edu>
To:	Alex Tomas <bzzz@....com>
Cc:	Thierry Vignaud <tvignaud@...driva.com>,
	Kevin Shanahan <kmshanah@...b.org.au>,
	Andreas Dilger <adilger@....com>, linux-ext4@...r.kernel.org
Subject: Re: More ext4 acl/xattr corruption - 4th occurence now

On Tue, May 19, 2009 at 04:01:36PM +0400, Alex Tomas wrote:
> Theodore Tso wrote:
>> On the other hand, most of the time writes into the directory will
>> tend to be into pre-existing free space; but if you had two parallel
>> cp's copying a large number of files into the same directory, that
>> could certainly happen.
>
> isn't access to a directory protected with i_mutex ?

Hmm, good point.  Yes, that should prevent problems with directories.
So there should only be a problem when two processes are writing to
the same file at the same time.

						- Ted
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