Subject: Re: [PATCH] x86/setup: fix low identity map for >= 2GB kernel range
To: Krzysztof Mazur <krzysiek@podlesie.net>, Borislav Petkov <bp@alien8.de>
References: <1446815916-22105-1-git-send-email-krzysiek@podlesie.net>
 <20151106132733.GC19522@pd.tnic> <20151106141139.GA2233@shrek.podlesie.net>
Cc: x86@kernel.org, linux-kernel@vger.kernel.org,
        Andrew Morton <akpm@linux-foundation.org>,
        Andy Lutomirski <luto@amacapital.net>,
        "H. Peter Anvin" <hpa@zytor.com>, Ingo Molnar <mingo@redhat.com>,
        Laszlo Ersek <lersek@redhat.com>,
        Matt Fleming <matt.fleming@intel.com>,
        Thomas Gleixner <tglx@linutronix.de>
From: Paolo Bonzini <pbonzini@redhat.com>
Message-ID: <563CC08A.6080607@redhat.com>
Date: Fri, 6 Nov 2015 16:00:26 +0100
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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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