linux-kernel - Re: [PATCH 0/8] x86, acpi: Move acpi_initrd

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Message-ID: <CAE9FiQUzM1fHbJOkrCMC4dHD7QPpR=tXyJ-mW=y9G0XucJqyRQ@mail.gmail.com>
Date:	Fri, 23 Aug 2013 15:08:27 -0700
From:	Yinghai Lu <yinghai@...nel.org>
To:	chen tang <imtangchen@...il.com>
Cc:	Russ Anderson <rja@....com>, "H. Peter Anvin" <hpa@...or.com>,
	Zhang Yanfei <zhangyanfei.yes@...il.com>,
	Toshi Kani <toshi.kani@...com>, Tejun Heo <tj@...nel.org>,
	Tang Chen <tangchen@...fujitsu.com>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	Bob Moore <robert.moore@...el.com>,
	Lv Zheng <lv.zheng@...el.com>,
	"Rafael J. Wysocki" <rjw@...k.pl>, Ingo Molnar <mingo@...e.hu>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Thomas Renninger <trenn@...e.de>,
	Yasuaki Ishimatsu <isimatu.yasuaki@...fujitsu.com>,
	Mel Gorman <mgorman@...e.de>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 0/8] x86, acpi: Move acpi_initrd_override() earlier.

On Fri, Aug 23, 2013 at 2:50 PM, chen tang <imtangchen@...il.com> wrote:
>>
>> so the DSDT is 7F493E, and total is more than 8M.
>>
>> that will need BRK to be extended 16M?
>>
>
> Then how about use early_ioremap(), and don't do it that early in
> head_32 and head64 ?

why could early_ioremap() help?

when to use early_ioremap()? what for?

Yinghai
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