linux-kernel - Re: [realtime kernel 2.6.21-rt2 and up] Extremely slow bootup for x86

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Message-ID: <46512778.2050205@tuxrocks.com>
Date:	Mon, 21 May 2007 00:00:40 -0500
From:	Frank Sorenson <frank@...rocks.com>
To:	Thomas Gleixner <tglx@...utronix.de>
CC:	Maarten Maathuis <madman2003@...il.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [realtime kernel 2.6.21-rt2 and up] Extremely slow bootup for
 x86_64

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Thomas Gleixner wrote:
> On Sun, 2007-05-20 at 14:25 +0200, Maarten Maathuis wrote:
>> When i try to boot a kernel higher than 2.6.21-rt1, it boots very
>> slowly. It takes minutes to even detect two cdrom players. I noticed
>> in the changelog:
>>
>> - x86/64 high-res timers and dynticks update (Thomas Gleixner)
>>
>> I included the .config from 2.6.21-rt1, which i ran make oldconfig on.
>>
>> I cannot provide any other information, since i estimate it will take
>> ages to bootup.
> 
> Does the same problem show up with
> 
> http://tglx.de/projects/hrtimers/2.6.22-rc2/linux-2.6.22-rc2-x86_64-highres-v1.patch
> 
> 	tglx

I see the slow bootup as well, even with 2.6.22-rc2-hrt1.  It takes at
least 5 times as long to boot, for X to start, to login, etc.

Frank
- --
Frank Sorenson - KD7TZK
Linux Systems Engineer, DSS Engineering, UBS AG
frank@...rocks.com
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