linux-kernel - Re: [GIT PATCH] TTY patches for 2.6.33-git

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Message-ID: <20091213192003.GC7297@nowhere>
Date:	Sun, 13 Dec 2009 20:20:05 +0100
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	Trond Myklebust <trond.myklebust@....uio.no>
Cc:	Ingo Molnar <mingo@...e.hu>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Greg KH <gregkh@...e.de>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	linux-kernel@...r.kernel.org
Subject: Re: [GIT PATCH] TTY patches for 2.6.33-git

On Sun, Dec 13, 2009 at 02:09:14PM -0500, Trond Myklebust wrote:
> On Sun, 2009-12-13 at 20:04 +0100, Frederic Weisbecker wrote: 
> > In the above cases we have the following comment:
> > 
> > /* Protect inode->i_flock using the BKL */
> > 
> > And really it doesn't seem to protect anything else,
> > fortunately it is acquired in a short path.
> 
> As I said in my reply, this is the tough one, because the BKL protection
> is imposed by the VFS locking scheme used in fs/locks.c.
> 
> There is a similar dependency imposed upon fs/lockd/



Ok.


> > fs/nfs/super.c: unlock_kernel();
> > fs/nfs/super.c: unlock_kernel();
> > 
> > Protect the mount/unmount path, a bit trickier there.
> > 
> > But really that looks way much easier to fix than it was
> > with reiserfs.
> 
> All the other cases you list should be fixed in the GIT PULL request
> that I just put out.
> 


Cool, thanks a lot!

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