linux-kernel - Re: [PATCH] x86: fix init_memory

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Date:	Sat, 28 Jun 2008 00:42:49 -0700
From:	"Yinghai Lu" <yhlu.kernel@...il.com>
To:	"Ingo Molnar" <mingo@...e.hu>
Cc:	"Thomas Gleixner" <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] x86: fix init_memory_mapping over boundary v2

On Sat, Jun 28, 2008 at 12:21 AM, Ingo Molnar <mingo@...e.hu> wrote:
>
> * Yinghai Lu <yhlu.kernel@...il.com> wrote:
>
>> On Sat, Jun 28, 2008 at 12:02 AM, Ingo Molnar <mingo@...e.hu> wrote:
>> >
>> > * Ingo Molnar <mingo@...e.hu> wrote:
>> >
>> >> * Yinghai Lu <yhlu.kernel@...il.com> wrote:
>> >>
>> >> > some end boundary is only page alignment, instead of 2M alignment, so
>> >> > call ker_phycial_mapping_init three times. then don't overmap above
>> >> > the max_low_pfn
>> >>
>> >> applied to tip/x86/unify-setup, thanks Yinghai.
>> >
>> > -tip testing found a 32-bit spontaneous reboot during bootup, with this
>> > config:
>> >
>> >  http://redhat.com/~mingo/misc/config-Sat_Jun_28_08_43_52_CEST_2008.bad
>> >
>> > no serial log produced at all.
>> >
>> > doing the reverts below fixes the problem.
>> >
>> >        Ingo
>> >
>> > commit 4ae56755fa1e1bd1500c97b5bf82d6519a261ffd
>> > Author: Ingo Molnar <mingo@...e.hu>
>> > Date:   Sat Jun 28 08:59:44 2008 +0200
>> >
>> >    Revert "x86: let setup_arch call init_apic_mappings for 32bit"
>> >
>> >    This reverts commit 7fce3bb20100e5b6c42ad66c495e6348522bfd37.
>> >
>> > commit 2703b959fc588f1b77290272f60bcf0bd8f6e557
>> > Author: Ingo Molnar <mingo@...e.hu>
>> > Date:   Sat Jun 28 08:59:39 2008 +0200
>> >
>> >    Revert "x86: fix init_memory_mapping over boundary v2"
>> >
>> >    This reverts commit 7a41ed2c98f860da38a944d8de5b29e6ec39cf76.
>> >
>> the system with 512M ?
>
> no, other 32-bit testsystems: 1GB RAM, 2GB RAM, etc.

good, i duplicate that one server with your config.

YH
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