linux-kernel - Re: [PATCH 0/5] kdump: extract log buffer and registers from vmcore on NMI button pressing

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20100604101519.GA24794@basil.fritz.box>
Date:	Fri, 4 Jun 2010 12:15:19 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Vitaly Mayatskikh <v.mayatskih@...il.com>
Cc:	Andi Kleen <andi@...stfloor.org>, Vivek Goyal <vgoyal@...hat.com>,
	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	Randy Dunlap <rdunlap@...otime.net>
Subject: Re: [PATCH 0/5] kdump: extract log buffer and registers from
	vmcore on NMI button pressing

On Fri, Jun 04, 2010 at 11:32:52AM +0200, Vitaly Mayatskikh wrote:
> At Thu, 3 Jun 2010 17:13:47 +0200, Andi Kleen wrote:
>  
> > > > NMI would be only needed if the crash kernel is completely
> > > > hosed too.
> > > 
> > > That's the case.
> > 
> > You're saying it booted but is hosed after boot?
> > 
> > That seems like a very obscure case. Is that really common?
> 
> As usual: for engineers, who have to deal with it - yes, it is common.

Well it would be better then to find out why that happens and fix it.

Is this related to kexec driver problems?

> 
> > > True. But as a last hope, when nothing else helps, it still may be
> > > worth trying :)
> > 
> > It will simply not work.
> 
> Why?

Because someone else steals all the NMIs.

-Andi
-- 
ak@...ux.intel.com -- Speaking for myself only.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/