linux-kernel - Re: [RFC v2 0/2] Early use of boot service memory

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Date:	Thu, 21 Nov 2013 17:12:57 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Matthew Garrett <mjg59@...f.ucam.org>
CC:	Jerry Hoemann <jerry.hoemann@...com>, rob@...dley.net,
	tglx@...utronix.de, mingo@...hat.com, x86@...nel.org,
	matt.fleming@...el.com, yinghai@...nel.org,
	akpm@...ux-foundation.org, bp@...e.de, linux-doc@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-efi@...r.kernel.org,
	penberg@...nel.org, mingo.kernel.org@...il.com, vgoyal@...hat.com
Subject: Re: [RFC v2 0/2] Early use of boot service memory

On 11/21/2013 03:37 PM, Matthew Garrett wrote:
> On Thu, Nov 21, 2013 at 03:18:41PM -0800, H. Peter Anvin wrote:
>> On 11/21/2013 03:07 PM, Matthew Garrett wrote:
>>> This is a problem we have to solve, but I don't think this is the right 
>>> way to solve it. Why do we not just reattempt to perform the allocation 
>>> immediately after we've freed the boot services regions?
>>>
>>
>> Wouldn't the memory map already have gotten scrambled all to hell by then?
> 
> If we couldn't map a 64MB region in low memory earlier then it's likely 
> to have been because there was a 64MB or greater boot services region.
> 

I thought the problem was that they wanted to map a fairly large chunk
for faster kdump and fragmentation was being a problem.

	-hpa

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