linux-kernel - Re: [PATCH -v2 11/13] x86/mm: calculate_table_space_size based on memory ranges that are being mapped

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Message-ID: <CAOJsxLHhU2n9Sqtqfb7yv+SfJWQyjFPP0uNVrFynurA04_09gw@mail.gmail.com>
Date:	Mon, 3 Sep 2012 08:36:38 +0300
From:	Pekka Enberg <penberg@...nel.org>
To:	Yinghai Lu <yinghai@...nel.org>
Cc:	Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...e.hu>,
	"H. Peter Anvin" <hpa@...or.com>, Jacob Shin <jacob.shin@....com>,
	Tejun Heo <tj@...nel.org>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH -v2 11/13] x86/mm: calculate_table_space_size based on
 memory ranges that are being mapped

On Sun, Sep 2, 2012 at 10:46 AM, Yinghai Lu <yinghai@...nel.org> wrote:
> From: Jacob Shin <jacob.shin@....com>
>
> Current logic finds enough space for direct mapping page tables from 0
> to end. Instead, we only need to find enough space to cover mr[0].start
> to mr[nr_range].end -- the range that is actually being mapped by
> init_memory_mapping()
>
> This patch also reportedly fixes suspend/resume issue reported in:
>
> https://lkml.org/lkml/2012/8/11/83
>
> -v2: update with calculate_table_space_size()
>      clear max_pfn_mapped before init_all_memory_mapping to get right value
>                                           -Yinghai Lu
>
> Signed-off-by: Jacob Shin <jacob.shin@....com>

Yinghai's sign-off is missing.

Reviewed-by: Pekka Enberg <penberg@...nel.org>
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