linux-kernel - Re: [BUG] 2.6.21: Kernel won't boot with either/both of CONFIG_NO_HZ, CONFIG_HIGH_RES

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Message-ID: <46367D7E.6060502@rtr.ca>
Date:	Mon, 30 Apr 2007 19:36:30 -0400
From:	Mark Lord <lkml@....ca>
To:	Linux Kernel <linux-kernel@...r.kernel.org>, tglx@...utronix.de
Cc:	Linus Torvalds <torvalds@...l.org>
Subject: Re: [BUG] 2.6.21: Kernel won't boot with either/both of CONFIG_NO_HZ,
 CONFIG_HIGH_RES_TIMERS

Mark Lord wrote:
> Mark Lord wrote:
>> Mark Lord wrote:
>>> I have a new notebook (Dell Inspiron 9400) with Core2-Duo T7400 @ 
>>> 2.1Ghz.
>>> When either/both of CONFIG_NO_HZ, CONFIG_HIGH_RES_TIMERS is used,
>>> the 2.6.21 kernel hangs on startup just after printing one/both of 
>>> these:
>> ..
>>
>> That's a hard hang, by the way.  No magic sysrq key or anything.

Well, in case this helps.  If I take the exact same .config that fails,
and add *only* this to it, it then boots just fine. 

   CONFIG_DETECT_SOFTLOCKUP=y

Thomas G., are you there??
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