linux-kernel - Re: [PATCH 0/4] memblock related fixes for -tip

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Message-ID: <4CB62D54.7000400@kernel.org>
Date:	Wed, 13 Oct 2010 15:06:12 -0700
From:	Yinghai Lu <yinghai@...nel.org>
To:	Jeremy Fitzhardinge <jeremy@...p.org>
CC:	"H. Peter Anvin" <hpa@...or.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...e.hu>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Vivek Goyal <vgoyal@...hat.com>
Subject: Re: [PATCH 0/4] memblock related fixes for -tip

On 10/13/2010 01:03 PM, Jeremy Fitzhardinge wrote:
>> a) Add an explicit interface to allocate bottoms-up, and have Xen use it
>> because it needs it.  This is appropriate if (and only if) the
>> allocations in Xen aren't underneath a bunch of extra layers.
> 
> The allocation is done in find_early_table_space() in x86/mm/init.c, so
> the allocation call itself can't be easily replaced, but I suppose some
> of the parameters could be global and tweaked by Xen code, but that's
> pretty ugly.

we already have
        base = memblock_find_in_range(start, max_pfn_mapped<<PAGE_SHIFT,
                                        tables, PAGE_SIZE);

so looks like xen have set max_pfn_mapped wrong?


Yinghai
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