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

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Message-ID: <49BF2054.9020009@zytor.com>
Date:	Mon, 16 Mar 2009 21:00:20 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Yinghai Lu <yinghai@...nel.org>
CC:	Jeremy Fitzhardinge <jeremy@...p.org>, Ingo Molnar <mingo@...e.hu>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [crash] Re: Latest brk patchset

Yinghai Lu wrote:
>>
>> You could also write:
>>
>> PAGE_TABLE_SIZE((-PAGE_OFFSET & 0xffffffff) >> PAGE_SHIFT) << PAGE_SHIFT
>>
>> (the & 0xffffffff is necessary, or you'll get a signed shift.)
> 
> max kernel address space range?
> 

Yes, either ((1 << 32)-PAGE_OFFSET) or (-PAGE_OFFSET & 0xffffffff)
should work for that.

	-hpa

-- 
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.

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