linux-kernel - Re: kexec boot regression

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Message-ID: <20091215204221.GZ28252@kernel.dk>
Date:	Tue, 15 Dec 2009 21:42:21 +0100
From:	Jens Axboe <jens.axboe@...cle.com>
To:	Yinghai Lu <yinghai@...nel.org>
Cc:	Jesse Barnes <jbarnes@...tuousgeek.org>,
	Linux Kernel <linux-kernel@...r.kernel.org>, mingo@...e.hu,
	rdreier@...co.com, Suresh Siddha <suresh.b.siddha@...el.com>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
	"H. Peter Anvin" <hpa@...or.com>, Huang Ying <ying.huang@...el.com>
Subject: Re: kexec boot regression

On Tue, Dec 15 2009, Yinghai Lu wrote:
> Jens Axboe wrote:
> > On Tue, Dec 15 2009, Yinghai Lu wrote:
> >> Jens Axboe wrote:
> >>> On Tue, Dec 15 2009, Yinghai Lu wrote:
> >>>> Jens Axboe wrote:
> >>>>> On Tue, Dec 15 2009, Yinghai Lu wrote:
> >>>>>> [PATCH] x86/pci: intel ioh bus num reg accessing fix
> >>>>>>
> >>>>>> it is above 0x100, so if mmconf is not enable, need to skip it
> >>>>> This works, it kexecs kernels fine. But since 2.6.32 doesn't have the
> >>>>> mmconf problem to begin with, are we now just working around the issue?
> >>>>> SRAT still reports issues, numa doesn't work.
> >>>> that patch will be bullet proof... we need it.
> >>>>
> >>>> also still need to figure out why memmap range is not passed properly.
> >>>>
> >>>> do you mean 2.6.32 kexec 2.6.32 it have worked mmconf and numa in
> >>>> second kernel?
> >>> Yes, 2.6.32 booted and 2.6.32 kexec'ed works just fine, no SRAT
> >>> complaints and NUMA works fine.
> >> do you need 
> >> memmap=62G@4G
> >> in this case?
> > 
> > Yes, I've needed that always.
> 
> good,
> 
> can you enable debug option in kexec to see why kexec can not pass
> whole 38? range to second kernel?

Not getting any output so far, -d doesn't do much. Poking around in the
source...

-- 
Jens Axboe

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