linux-kernel - Re: [PATCH] x86: keep the page count correct

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Mon, 27 Oct 2008 09:50:28 -0700
From:	Suresh Siddha <suresh.b.siddha@...el.com>
To:	Yinghai Lu <yinghai@...nel.org>
Cc:	Ingo Molnar <mingo@...e.hu>, Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	"Siddha, Suresh B" <suresh.b.siddha@...el.com>,
	Jeremy Fitzhardinge <jeremy@...p.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] x86: keep the page count correct

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@...nel.org>

Acked-by: Suresh Siddha <suresh.b.siddha@...el.com>
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/