linux-kernel - Re: [RFC 0/9] mce recovery for Sandy Bridge server

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Message-ID: <20110525214737.GA8955@elte.hu>
Date:	Wed, 25 May 2011 23:47:37 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Tony Luck <tony.luck@...el.com>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"Huang, Ying" <ying.huang@...el.com>,
	Andi Kleen <andi@...stfloor.org>,
	Borislav Petkov <bp@...en8.de>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Mauro Carvalho Chehab <mchehab@...hat.com>,
	Frédéric Weisbecker <fweisbec@...il.com>
Subject: Re: [RFC 0/9] mce recovery for Sandy Bridge server


* Tony Luck <tony.luck@...el.com> wrote:

> 2011/5/25 Ingo Molnar <mingo@...e.hu>:
>
> > Btw., the SIGKILL logic is probably overcomplicated: when it's 
> > clear that user-space can not recover why not do a do_exit() and 
> > be done with it? As long as it's called from a syscall level 
> > codepath and no locks/resources are held do_exit() can be called.
> 
> There is no SIGKILL  [...]

there is one here:

mm/memory-failure.c::kill_procs_ao()

                                force_sig(SIGKILL, tk->tsk);

Which can be reached from memory_failure() in certain (justified) 
circumstances.

Thanks,

	Ingo
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