linux-kernel - Re: [Bug 8473] New: Oops: 0010 [1] SMP

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Message-Id: <1181330448.5365.7.camel@amdx2.microgate.com>
Date:	Fri, 08 Jun 2007 14:20:48 -0500
From:	Paul Fulghum <paulkf@...rogate.com>
To:	Björn Steinbrink <B.Steinbrink@....de>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Arnd Bergmann <arnd@...db.de>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Nicolas Mailhot <nicolas.mailhot@...oste.net>,
	Randy Dunlap <randy.dunlap@...cle.com>,
	"bugme-daemon@...nel-bugs.osdl.org" 
	<bugme-daemon@...zilla.kernel.org>, linux-kernel@...r.kernel.org,
	Mel Gorman <mel@....ul.ie>,
	Christoph Lameter <clameter@....com>
Subject: Re: [Bug 8473] New: Oops: 0010 [1] SMP

On Fri, 2007-06-08 at 10:16 -0500, Paul Fulghum wrote:
> On Fri, 2007-06-08 at 05:06 +0200, Björn Steinbrink wrote:
> > This is do_tty_hangup() exchanging the fops while we're waiting for the
> > lock. The new fops (hung_up_tty_fops) only have the unlocked variant and
> > thus we Oops our way.
...
> Here is a patch that restores the locked ioctl for hung_up_tty_ioctl.
> Can you try it and see if it removes your oops?

Unfortunately I can't get the timing right to trigger this,
but it is very clear the locked ioctl fop must not be
allowed to disappear like my original patch allows.

Andrew:

Would you prefer I resend the entire compat ioctl patch or
submit an incremental patch like in my message I'm quoting above?

-- 
Paul Fulghum
Microgate Systems, Ltd

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