linux-kernel - Re: edac_core: crashes on shutdown

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: Windows password security audit tool. GUI, reports in PDF.

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

Date:	Thu, 2 Dec 2010 19:37:24 +0100
From:	Borislav Petkov <bp@...64.org>
To:	Tobias Karnat <tobias.karnat@...glemail.com>
Cc:	"linux-edac@...r.kernel.org" <linux-edac@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Doug Thompson <norsk5@...oo.com>
Subject: Re: edac_core: crashes on shutdown

On Thu, Dec 02, 2010 at 01:05:01PM -0500, Tobias Karnat wrote:
> This patch fixed it.
> I have rebooted five times and it does not crash anymore.
> 
> Thank you.

Thanks for testing and taking pictures :). I'll send it to Linus before
.37 is out.

> Btw, are there any information available regarding the NMI option?
> 
> parm:	edac_op_state:EDAC Error Reporting state: 0=Poll,1=NMI (int)
> 
> In edac.txt NMI is listed under FUTURE HARDWARE SCANNING.

Well, looking at <arch/x86/kernel/traps.c:mem_parity_error()> this
should already work. But it is kinda of a hack, if I'm reading Doug
correctly: http://lkml.org/lkml/2010/9/21/144

And yes, using some kind of an interrupt is much better than polling but
I don't know whether there's a single interrupt source for the error
types all edac drivers can decode and report. In the amd64_edac case,
we're piggybacking on MCE, for example. This was actually the initial
reason for 00740c58541b6087d78418cebca1fcb86dc6077d and dropping polling
from that driver.

Doug, any additions?

-- 
Regards/Gruss,
Boris.

Advanced Micro Devices GmbH
Einsteinring 24, 85609 Dornach
General Managers: Alberto Bozzo, Andrew Bowd
Registration: Dornach, Gemeinde Aschheim, Landkreis Muenchen
Registergericht Muenchen, HRB Nr. 43632
--
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/