linux-kernel - Re: HPET regression in 2.6.26 versus 2.6.25 -- found another user with the same regression

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Message-ID: <86802c440808200231h27ab9121ofe68c86c2a80535e@mail.gmail.com>
Date:	Wed, 20 Aug 2008 02:31:03 -0700
From:	"Yinghai Lu" <yhlu.kernel@...il.com>
To:	"Ingo Molnar" <mingo@...e.hu>, "Vivek Goyal" <vgoyal@...hat.com>
Cc:	"Bill Fink" <billfink@...dspring.com>,
	"David Witbrodt" <dawitbro@...global.net>,
	linux-kernel@...r.kernel.org,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	"Peter Zijlstra" <peterz@...radead.org>,
	"Thomas Gleixner" <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>, netdev <netdev@...r.kernel.org>
Subject: Re: HPET regression in 2.6.26 versus 2.6.25 -- found another user with the same regression

On Wed, Aug 20, 2008 at 2:15 AM, Ingo Molnar <mingo@...e.hu> wrote:
>
> * Yinghai Lu <yhlu.kernel@...il.com> wrote:
>
>> > This is true if he reverted just the 3def3d6d... commit, but if he
>> > also reverts the similar, and immediately following, 1e934dda...
>> > commit, then his 2.6.26 kernel runs fine.
>>
>> interesting,
>>
>> David, can you try only comment out
>>
>> late_initcall(lapic_insert_resource);
>
> i.e. the patch below?
>
> what's your theory, what could be the reason for David's lockups?

could be insert_resource related.
1. revert patch that change back insert_resource doesn't work
2. insert_resource for lapic address moved to late after ....

need to add debug printout for insert_resource/request_resource to
make sure thing going well

YH
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