Re: 3.14-rc2 XFS backtrace because irqs_disabled.

[Al Viro <viro@xxxxxxxxxxxxxxxxxx>]

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.