linux-kernel - Re: [3.9-rc1 x86] Bug in ioremap code?

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Date:	Wed, 6 Mar 2013 23:58:08 +0900
From:	Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>
To:	bp@...en8.de, dave@...ux.vnet.ibm.com
Cc:	hpa@...ux.intel.com, linux-kernel@...r.kernel.org
Subject: Re: [3.9-rc1 x86] Bug in ioremap code?

Borislav Petkov wrote:
> Ok, before we continue guessing stuff, Tetsuo, can you please explain
> how exactly you're triggering this. More specifically, we need .config,
> hypervisor version, I'm assuming kernel is 3.9-rc1, Linux is guest/host
> etc, etc.

I'm using CentOS 6.3 x86_32 guest running on VMware Workstation 6.5.5 for
Windows XP x86_32 host and VMware Player 4.0.5 for Windows 7 x86_64 host.

Kernel version is 3.9-rc1 x86_32. This bug can be triggered only when the
guest has little RAM such that /proc/meminfo reports that HighTotal == 0.
Config is at http://I-love.SAKURA.ne.jp/tmp/config-3.9-rc1-acpi .

I don't know why but changing kernel config to CONFIG_ACPI=n
( http://I-love.SAKURA.ne.jp/tmp/config-3.9-rc1-noacpi ) solves this bug.
Well, should I run bisection on ACPI code?

Regards.
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