From: Yinghai Lu <yinghai@kernel.org>
To: Roland Dreier <rdreier@cisco.com>
Cc: Jens Axboe <jens.axboe@oracle.com>, Ingo Molnar <mingo@elte.hu>,
Thomas Gleixner <tglx@linutronix.de>,
"H. Peter Anvin" <hpa@zytor.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: Bisected regression
Date: Thu, 10 Dec 2009 11:33:20 -0800 [thread overview]
Message-ID: <4B214D00.90908@kernel.org> (raw)
In-Reply-To: <adaaaxqmxvs.fsf@roland-alpha.cisco.com>
Roland Dreier wrote:
> > that is funny. we may need to use find early for our TRAMPOLINE...?
>
> > otherwise your mptable is corrupted....
>
> Wouldn't surprise me if mptable is messed up... most likely BIOS people
> take more care to get ACPI right.
>
> I'm not an expert on this stuff, but do we need the mptable if ACPI info
> is there?
that BIOS is using first 64k for mptable. and after booting those mptable is overwritten by trampoline.
before that happen, kernel already analyse the table and get enough info.
so when you boot with acpi=off and then try to kexec second kernel still with acpi=off, you will not get booted.
YH
next prev parent reply other threads:[~2009-12-10 19:34 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-12-10 9:10 current -git fails to boot on nehalem-ex Jens Axboe
2009-12-10 10:39 ` Bisected regression (Was Re: current -git fails to boot on nehalem-ex) Jens Axboe
2009-12-10 16:06 ` Ingo Molnar
2009-12-10 17:26 ` Yinghai
2009-12-10 18:07 ` Jens Axboe
2009-12-10 18:34 ` Yinghai Lu
2009-12-10 18:41 ` Bisected regression Roland Dreier
2009-12-10 18:44 ` Jens Axboe
2009-12-10 19:13 ` Yinghai Lu
2009-12-10 18:44 ` Yinghai Lu
2009-12-10 18:42 ` Bisected regression (Was Re: current -git fails to boot on nehalem-ex) Yinghai Lu
2009-12-10 18:45 ` Jens Axboe
2009-12-10 19:07 ` Jens Axboe
2009-12-10 19:19 ` Yinghai Lu
2009-12-10 19:26 ` Jens Axboe
2009-12-10 19:34 ` Bisected regression Roland Dreier
2009-12-10 21:07 ` Bisected regression (Was Re: current -git fails to boot on nehalem-ex) Yinghai Lu
2009-12-10 21:15 ` Jens Axboe
2009-12-10 22:39 ` H. Peter Anvin
2009-12-10 22:45 ` Yinghai Lu
2009-12-10 22:54 ` H. Peter Anvin
2009-12-10 22:47 ` Bisected regression Roland Dreier
2009-12-10 22:50 ` H. Peter Anvin
2009-12-11 8:19 ` Bisected regression (Was Re: current -git fails to boot on nehalem-ex) Jens Axboe
2009-12-11 8:32 ` Ingo Molnar
2009-12-11 8:55 ` [tip:x86/urgent] x86: Use find_e820() instead of hard coded trampoline address tip-bot for Yinghai Lu
2009-12-10 19:28 ` Bisected regression Roland Dreier
2009-12-10 19:33 ` Yinghai Lu [this message]
2009-12-10 19:36 ` Roland Dreier
2009-12-10 19:50 ` Yinghai Lu
2009-12-10 22:44 ` H. Peter Anvin
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