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Date: Mon, 27 Oct 2008 09:50:28 -0700
From: Suresh Siddha <suresh.b.siddha@intel.com>
To: Yinghai Lu <yinghai@kernel.org>
Cc: Ingo Molnar <mingo@elte.hu>, Thomas Gleixner <tglx@linutronix.de>,
       "H. Peter Anvin" <hpa@zytor.com>,
       "Siddha, Suresh B" <suresh.b.siddha@intel.com>,
       Jeremy Fitzhardinge <jeremy@goop.org>,
       Andrew Morton <akpm@linux-foundation.org>,
       "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] x86: keep the page count correct
Message-ID: <20081027165028.GB30573@linux-os.sc.intel.com>
References: <490406FD.30604@kernel.org>
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On Sat, Oct 25, 2008 at 10:58:21PM -0700, Yinghai Lu wrote:
> 
> impact: get correct page count for 2M and 1G...
> 
> found page count in /proc/meminfo is nor correct on 1G system in VirtualBox 2.0.4
> 
> # cat /proc/meminfo
> MemTotal:        1017508 kB
> MemFree:          822700 kB
> Buffers:            1456 kB
> Cached:            26632 kB
> SwapCached:            0 kB
> ...
> Hugepagesize:       2048 kB
> DirectMap4k:      4032 kB
> DirectMap2M:  18446744073709549568 kB
> 
> with this patch get:
> ...
> DirectMap4k:      4032 kB
> DirectMap2M:   1044480 kB
> 
> which is consistent to kernel_page_tables
> ---[ Low Kernel Mapping ]---
> 0xffff880000000000-0xffff880000001000           4K     RW     PCD     GLB x  pte
> 0xffff880000001000-0xffff88000009f000         632K     RW             GLB x  pte
> 0xffff88000009f000-0xffff8800000a0000           4K     RW     PCD     GLB x  pte
> 0xffff8800000a0000-0xffff880000200000        1408K     RW             GLB x  pte
> 0xffff880000200000-0xffff88003fe00000        1020M     RW         PSE GLB x  pmd
> 0xffff88003fe00000-0xffff88003fff0000        1984K     RW             GLB NX pte
> 0xffff88003fff0000-0xffff880040000000          64K                           pte
> 0xffff880040000000-0xffff888000000000         511G                           pud
> 0xffff888000000000-0xffffc20000000000       58880G                           pgd
> 
> Signed-off-by: Yinghai Lu <yinghai@kernel.org>

Acked-by: Suresh Siddha <suresh.b.siddha@intel.com>