linux-kernel - Re: [Patch] x86, mm: fix the size calculation of mapping tables

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Message-ID: <20120116075822.GI15641@elte.hu>
Date:	Mon, 16 Jan 2012 08:58:22 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	xiyou.wangcong@...il.com
Cc:	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Yinghai Lu <yinghai@...nel.org>, Tejun Heo <tj@...nel.org>,
	ianfang.cn@...il.com, Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	Stefano Stabellini <stefano.stabellini@...citrix.com>
Subject: Re: [Patch] x86, mm: fix the size calculation of mapping tables


* xiyou.wangcong@...il.com <xiyou.wangcong@...il.com> wrote:

> For machine enables PSE, the first 2/4M memory region still uses
> 4K pages, so needs more PTEs in this case, but find_early_table_space()
> doesn't count this. This patch fixes it.
> 
> Cc: Yinghai Lu <yinghai@...nel.org>
> Cc: Tejun Heo <tj@...nel.org>
> Cc: ianfang.cn@...il.com
> Signed-off-by: WANG Cong <xiyou.wangcong@...il.com>

What were the symptoms of this bug - or have you found it via 
review only?

Thanks,

	Ingo
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