From: Anton Blanchard <anton@samba.org>
Date: Fri, 5 Mar 2010 21:42:55 +0000 (-0800)
Subject: panic: fix panic_timeout accuracy when running on a hypervisor
X-Git-Tag: v2.6.34-rc1~122
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8aeee85a29e27e043db582bf2ae8e5f42767934f;p=pandora-kernel.git

panic: fix panic_timeout accuracy when running on a hypervisor

I've had some complaints about panic_timeout being wildly innacurate on
shared processor PowerPC partitions (a 3 minute panic_timeout taking 30
minutes).

The problem is we loop on mdelay(1) and with a 1ms in 10ms hypervisor
timeslice each of these will take 10ms (ie 10x) longer.  I expect other
platforms with shared processor hypervisors will see the same issue.

This patch keeps the old behaviour if we have a panic_blink (only keyboard
LEDs right now) and does 1 second mdelays if we don't.

Signed-off-by: Anton Blanchard <anton@samba.org>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

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