linux-kernel - Re: [crash] Re: Latest brk patchset

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Message-ID: <49BEAFEC.7020400@goop.org>
Date:	Mon, 16 Mar 2009 13:00:44 -0700
From:	Jeremy Fitzhardinge <jeremy@...p.org>
To:	Yinghai Lu <yinghai@...nel.org>
CC:	"H. Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...e.hu>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [crash] Re: Latest brk patchset

Yinghai Lu wrote:
>> -INIT_MAP_SIZE = (PAGE_TABLE_SIZE + ALLOCATOR_SLOP) * PAGE_SIZE_asm
>> -RESERVE_BRK(pagetables, INIT_MAP_SIZE)
>> +/* Enough space to fit pagetables for the low memory linear map */
>> +MAPPING_BEYOND_END = (PAGE_TABLE_SIZE(1 << (32 - PAGE_SHIFT)) * PAGE_SIZE)
>>     
>
> that is for 4g?
>   

Yes, I suppose it only needs to be 1G.  But it doesn't make much 
difference in practice.

    J
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