From: "kanishk rastogi" <kanishk.85@gmail.com>
To: David Chinner <dgc@sgi.com>
Cc: xfs@oss.sgi.com
Subject: Re: Need of inode->i_mutex in xfs_write()
Date: Fri, 7 Sep 2007 11:28:27 +0545 [thread overview]
Message-ID: <9ee2fe770709062243u67956d26o7222435956213f0@mail.gmail.com> (raw)
In-Reply-To: <20070823225111.GW72985246@sgi.com>
On 8/24/07, David Chinner <dgc@sgi.com> wrote:
> On Tue, Aug 21, 2007 at 09:11:56PM +0545, kanishk rastogi wrote:
> > I was looking at the xfs_write code path in kernel 2.6.20 .......
> > I saw it acquiring inode->i_mutex .
> > Whats the need ?
> > What are we safegaurding inode for.
>
> See Documentation/filesystems/Locking and other files in that
> directory for what i_mutex is supposed to protect.
>
> XFS is different as it has it's own inodes and inode locks, but
> it still mostly uses i_mutex inteh accepted way.
>
xfs_write comes in file_operations->aio_write()
and the documentation doesnt say anything for it to acquire i_mutex in
that path.
I still fail to understand its usage.
Where i am going wrong.
regards
kanishk
> Cheers,
>
> Dave.
> --
> Dave Chinner
> Principal Engineer
> SGI Australian Software Group
>
next prev parent reply other threads:[~2007-09-07 6:10 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-08-21 15:26 Need of inode->i_mutex in xfs_write() kanishk rastogi
2007-08-23 22:51 ` David Chinner
2007-09-07 5:43 ` kanishk rastogi [this message]
2007-09-07 12:15 ` David Chinner
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