linux-kernel - Re: "x86-64, mm: Put early page table high" causes crash on Xen

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Message-ID: <AANLkTimq_cqZ7xgLcx5ch_GQS5gxQse5gVqpaTYRXh_x@mail.gmail.com>
Date:	Tue, 8 Mar 2011 12:21:51 -0800
From:	Yinghai Lu <yinghai@...nel.org>
To:	Stefano Stabellini <stefano.stabellini@...citrix.com>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	Jeremy Fitzhardinge <Jeremy.Fitzhardinge@...rix.com>
Subject: Re: "x86-64, mm: Put early page table high" causes crash on Xen

On Tue, Mar 8, 2011 at 12:09 PM, Stefano Stabellini
<stefano.stabellini@...citrix.com> wrote:
> On Tue, 8 Mar 2011, Yinghai Lu wrote:
>> [    0.000000] kernel direct mapping tables up to 7f750000 @
>> [0x7f74c000-0x7f74ffff] pre-allocated
>> [    0.000000] DEBUG map_low_page phys    243a000
>> [    0.000000] DEBUG map_low_page phys    243e000
>> [    0.000000] DEBUG alloc_low_page phys   7f74c000
>> [    0.000000] DEBUG map_low_page phys    243a000
>> [    0.000000] DEBUG map_low_page phys   7f74c000
>> [    0.000000] DEBUG alloc_low_page phys   7f74d000
>>
>
> I couldn't see this on my machine but I was afraid it could happen on
> some hardware :(

if system have more than 4g memory.

> Thank you very much for spending your time on this and for your kind
> replies.
> I'll follow up with an update of the xen specific patch I posted before
> and I won't bother you again with this :)

never mind.

Thanks

Yinghai
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