linux-kernel - Re: 3.14-rc2 XFS backtrace because irqs

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Date:	Fri, 14 Feb 2014 08:19:12 -0800
From:	Christoph Hellwig <hch@...radead.org>
To:	Al Viro <viro@...IV.linux.org.uk>
Cc:	Christoph Hellwig <hch@...radead.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Oleg Nesterov <oleg@...hat.com>, Dave Jones <davej@...hat.com>,
	Eric Sandeen <sandeen@...deen.net>,
	Linux Kernel <linux-kernel@...r.kernel.org>, xfs@....sgi.com
Subject: Re: 3.14-rc2 XFS backtrace because irqs_disabled.

On Fri, Feb 14, 2014 at 04:16:24PM +0000, Al Viro wrote:
> > All of these have in common that they try to handle signals in a kernel
> > thread (which we don't even allow by default), and that they ignore the
> > siginfo.  I think they could mostly be replaced by an addition to the
> > kthread API to allow a kthread to be killed by signals for legacy
> > reasons.
> 
> FWIW, there's a funny situation - all users of dequeue_signal_lock()
> actually ignore info completely.  I'm not saying that we ought to
> stop returning it, but e.g. jbd part of that patch is simply

Might aswell stick the discmiss into what was dequeue_signal_lock().
Which at that point should get a saner name (maybe thread_dequeue_signal ?)
and lose all argument except maybe task_struct - not that it's
nessecary, but it would mirror the other functions usually used around
it.

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