Date: Mon, 17 Feb 2014 17:40:59 +0000
From: Al Viro <viro@ZenIV.linux.org.uk>
To: Oleg Nesterov <oleg@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
        Dave Chinner <david@fromorbit.com>, Dave Jones <davej@redhat.com>,
        Eric Sandeen <sandeen@sandeen.net>,
        Linux Kernel <linux-kernel@vger.kernel.org>, xfs@oss.sgi.com
Subject: Re: 3.14-rc2 XFS backtrace because irqs_disabled.
Message-ID: <20140217174059.GD18016@ZenIV.linux.org.uk>
References: <CA+55aFxwozCQ05axLB02R3huX8sj=20EoFfw0cSDDL8fBE_Y6Q@mail.gmail.com>
 <20140215052531.GX18016@ZenIV.linux.org.uk>
 <20140215142700.GA15540@redhat.com>
 <20140215152251.GY18016@ZenIV.linux.org.uk>
 <20140215153631.GZ18016@ZenIV.linux.org.uk>
 <20140215155838.GA18016@ZenIV.linux.org.uk>
 <20140215174345.GA24799@redhat.com>
 <20140215180520.GC18016@ZenIV.linux.org.uk>
 <20140215184531.GA27314@redhat.com>
 <20140217165735.GA29173@redhat.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20140217165735.GA29173@redhat.com>
User-Agent: Mutt/1.5.21 (2010-09-15)
Sender: linux-kernel-owner@vger.kernel.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.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/