linux-kernel - Re: [Bugme-new] [Bug 7495] New: Kernel periodically hangs.

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:	Mon, 13 Nov 2006 03:07:56 +0100
From:	Andi Kleen <ak@...e.de>
To:	Dave Jones <davej@...hat.com>
Cc:	Arjan van de Ven <arjan@...radead.org>,
	Adrian Bunk <bunk@...sta.de>, Andrew Morton <akpm@...l.org>,
	David Howells <dhowells@...hat.com>,
	Neil Brown <neilb@....unsw.edu.au>,
	"bugme-daemon@...nel-bugs.osdl.org" 
	<bugme-daemon@...zilla.kernel.org>, linux-kernel@...r.kernel.org,
	alex@...snet.ru, mingo@...hat.com
Subject: Re: [Bugme-new] [Bug 7495] New: Kernel periodically hangs.

> Andi has a nice patch in the suse kernel which adds heuristics to disable
> apic on systems where it isn't likely to work.  It DTRT in at least
> one problem case that I know of.   The actual fall-out from enabling
> 'run SMP kernels on UP i686' for FC6 has mostly been a non-event.
> Literally a handful of cases, that will likely all get caught and worked
> around by Andi's patch or similar.

I haven't pushed that recently because i was busy with other things, but
needs to be revisited yes.

One broken case that still happens is that the patch assumes working
SMBIOS. When there is no year in SMBIOS it will turn off APIC because
it assumes it is a very old system. But sometimes new systems who would
like APIC have illegal or broken SMBIOS year. On very new systems it isn't
a problem again because those tend to have multiple cores.

That could be probably a bit more clever. It's always difficult to
navigate around all kinds of BIOS bugs.

-Andi
-
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/