From: John Haxby <john.haxby@oracle.com>
To: Jan Engelhardt <jengelh@medozas.de>
Cc: Patrick McHardy <kaber@trash.net>,
Netfilter Developer Mailing List
<netfilter-devel@vger.kernel.org>,
Linux Netdev List <netdev@vger.kernel.org>
Subject: Re: [PATCH 1/2] netfilter: xtables: inclusion of xt_SYSRQ
Date: Wed, 28 Apr 2010 16:50:16 +0100 [thread overview]
Message-ID: <4BD85938.104@oracle.com> (raw)
In-Reply-To: <alpine.LSU.2.01.1004281701220.9518@obet.zrqbmnf.qr>
On 28/04/10 16:03, Jan Engelhardt wrote:
> On Wednesday 2010-04-28 16:54, John Haxby wrote:
>
>> use-case I see -- the one I see is where the sys admins used to have a "crash
>> trolley" which was a console and PS/2 keyboard which they could plug into a
>> machine to get some information, but as many rack machines no longer have
>> anything PS/2 and USB hot plug is unlikely to work on a sick machine
>>
> Oh I can tell you stories... sometimes it's so dead in the water that
> the console unblanking would not work any more, rendering even any PS/2
> useless. Stupid southbridge chipsets blowing up DMA :-)
>
There's no hope in that case :-) Just take the machine out and give it
a decent burial.
On the other hand it's not uncommon to see reports that a machine has
"hung totally" that include output from ping to show that it hasn't.
Actually it's amazingly common to see this. And in just this situation
xt_SYSRQ is still quite likely to work.
jch
next prev parent reply other threads:[~2010-04-28 15:50 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-04-21 10:26 nf-next: sysrq and condition 20100421 Jan Engelhardt
2010-04-21 10:26 ` [PATCH 1/2] netfilter: xtables: inclusion of xt_SYSRQ Jan Engelhardt
2010-04-21 12:59 ` Patrick McHardy
2010-04-21 13:07 ` Jan Engelhardt
2010-04-21 13:17 ` Patrick McHardy
2010-04-21 13:35 ` Jan Engelhardt
2010-04-28 14:43 ` John Haxby
2010-04-28 14:54 ` John Haxby
2010-04-28 15:03 ` Jan Engelhardt
2010-04-28 15:50 ` John Haxby [this message]
2010-07-25 16:49 ` Jan Engelhardt
2010-07-25 18:13 ` John Haxby
2012-01-05 13:19 ` Shan Wei
2010-04-21 10:26 ` [PATCH 2/2] netfilter: xtables: inclusion of xt_condition Jan Engelhardt
2010-04-21 13:07 ` Patrick McHardy
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