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Date: Mon, 17 Feb 2014 17:40:59 +0000
From: Al Viro <viro@ZenIV.linux.org.uk>
Subject: Re: 3.14-rc2 XFS backtrace because irqs_disabled.
Message-ID: <20140217174059.GD18016@ZenIV.linux.org.uk>
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To: Oleg Nesterov <oleg@redhat.com>
Cc: Eric Sandeen <sandeen@sandeen.net>, Linux Kernel <linux-kernel@vger.kernel.org>, xfs@oss.sgi.com, Dave Jones <davej@redhat.com>, Linus Torvalds <torvalds@linux-foundation.org>

On Mon, Feb 17, 2014 at 05:57:35PM +0100, Oleg Nesterov wrote:

> Looks like, this is all is really nasty. Actually, I think siginfo on
> stack is not that bad if we are going to do handle_signal() or restart,
> perhaps we can do the extra kmalloc/memcpy/kfree for do_coredump().
> Something like below.

Yecchhhh...  You've just broken every architecture other than x86, and to
fix them you'll need to massage every get_signal()/get_signal_to_deliver()
user out there, pulling the logics *out* of kernel/signal.c and into arch/*.
This is just plain wrong.

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