linux-kernel - Re: [PATCH] kexec: reenable HPET before kexec

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Message-ID: <m1zm0c4ylf.fsf@ebiederm.dsl.xmission.com>
Date:	Mon, 27 Aug 2007 12:33:00 -0600
From:	ebiederm@...ssion.com (Eric W. Biederman)
To:	"Pallipadi, Venkatesh" <venkatesh.pallipadi@...el.com>
Cc:	<vgoyal@...ibm.com>,
	"Konstantin Baydarov" <kbaidarov@...mvista.com>,
	"RT" <linux-rt-users@...r.kernel.org>,
	"linux-kernel" <linux-kernel@...r.kernel.org>,
	"Andi Kleen" <ak@...e.de>
Subject: Re: [PATCH] kexec: reenable HPET before kexec

"Pallipadi, Venkatesh" <venkatesh.pallipadi@...el.com> writes:

> - Another thing to try is to disable HPET and boot with PIT in the first
> kernel. Just to check whether PIT never works on this platform or the
> first kernel is doing something to stop PIT. You can try "hpet=disable"
> boot option for that.

I don't know what the original patch looked like.  It doesn't
seem to have made it to any mailling lists to which I'm subscribed.
But I'm wondering of there is a bug in the shutdown routines for
the pit or the hpet that is causing problems.  As this is
a normal kexec those routines will get called.

Eric
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