linux-kernel - Re: [PATCH] x86/setup: fix low identity map for >= 2GB kernel range

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Message-ID: <563CC08A.6080607@redhat.com>
Date:	Fri, 6 Nov 2015 16:00:26 +0100
From:	Paolo Bonzini <pbonzini@...hat.com>
To:	Krzysztof Mazur <krzysiek@...lesie.net>,
	Borislav Petkov <bp@...en8.de>
Cc:	x86@...nel.org, linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Andy Lutomirski <luto@...capital.net>,
	"H. Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...hat.com>,
	Laszlo Ersek <lersek@...hat.com>,
	Matt Fleming <matt.fleming@...el.com>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH] x86/setup: fix low identity map for >= 2GB kernel range



On 06/11/2015 15:11, Krzysztof Mazur wrote:
>> > 
>> > http://git.kernel.org/tip/1c5dac914794f0170e1582d8ffdee52d30e0e4dd
>> > 
> Thanks and sorry. Yes, it has been already fixed. I've rechecked only
> mainline.
> 
> However, I think that there should be
> min(KERNEL_PGD_PTRS, KERNEL_PGD_BOUNDARY), not just KERNEL_PGD_BOUNDARY
> (usually 768 for normal 1G/3G split), because swapper_pg_dir has only
> 1024 entries and 768+768 is 1536.

You are right.

Paolo
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