linux-kernel - Re: kdump broken on 2.6.37-rc4

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Message-Id: <3C6B7683-9CDC-4C4A-A32A-56227DE01387@kernel.org>
Date:	Thu, 16 Dec 2010 19:58:48 -0800
From:	Yinghai <yinghai@...nel.org>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	Vivek Goyal <vgoyal@...hat.com>,
	Stanislaw Gruszka <sgruszka@...hat.com>,
	Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	Maxim Uvarov <muvarov@...il.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Neil Horman <nhorman@...hat.com>
Subject: Re: kdump broken on 2.6.37-rc4

Please don't do that to 64 bit

My big system with 1024g memory and a lot of cards with rhel 6 to make kdump work must have crashkernel=512m and second kernel need to take pci=nomsi

Thanks

On Dec 16, 2010, at 7:31 PM, "H. Peter Anvin" <hpa@...or.com> wrote:

> On 12/15/2010 08:29 PM, Yinghai Lu wrote:
>> please check
>> 
>> [PATCH] x86, crashkernel, 32bit: only try to get range under 512M
>> 
>> Steanishlaw report kdump is 32bit is broken.
>> 
>> in misc.c for decompresser, it will do sanity checking to make sure heap
>> heap under 512M.
>> 
>> So limit it in first kernel under 512M for 32bit system.
>> 
>> Reported-by: Stanislaw Gruszka <sgruszka@...hat.com>
>> Signed-off-by: Yinghai Lu <yinghai@...nel.org>
>> 
>> ---
>> arch/x86/kernel/setup.c |   14 +++++++++++++-
>> 1 file changed, 13 insertions(+), 1 deletion(-)
>> 
> 
> I'd like to apply a modified version of this patch (attached.)
> 
> Ack/nak, people?
> 
>    -hpa
> <0001-x86-kexec-Limit-the-crashkernel-address-to-512-MiB.patch>
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