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Date: Sat, 28 Feb 2009 12:42:50 -0800
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Subject: Re: does boot loader check uncompressed kernel size?
From: Yinghai Lu <yinghai@kernel.org>
To: "H. Peter Anvin" <hpa@zytor.com>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>, Ingo Molnar <mingo@elte.hu>,
       Jeremy Fitzhardinge <jeremy@goop.org>,
       "the arch/x86 maintainers" <x86@kernel.org>,
       Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
       Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
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On Sat, Feb 28, 2009 at 12:08 AM, H. Peter Anvin <hpa@zytor.com> wrote:
> Yinghai Lu wrote:
>>
>> On Fri, Feb 27, 2009 at 11:47 PM, Cyrill Gorcunov <gorcunov@gmail.com>
>> wrote:
>>>
>>> [Yinghai Lu - Fri, Feb 27, 2009 at 11:39:06PM -0800]
>>> | wonder if boot loader check uncompress size aka vmlinux size in bzImage
>>> | before it find one good position for bzImage...?
>>> |
>>> | YH
>>> |
>>>
>>> At least for x86-64 in grub-1.96 I didn't find such a check.
>>> Btw, but why should it care? Or you mean something else?
>>
>> thinking about Jeremy's brk patches that may use ram after _end blindly...
>>
>
> We already do that.  Jeremy's brk patches just formalizes it.
>

No, after we extend reserve_early from 64bit to 32bit, we don't use
RAM blindly in early stage.

YH