linux-kernel - Re: [PATCH] [6/8] Account overlapped mappings in end_pfn

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]

Message-ID: <20080211071237.36324cb2@laptopd505.fenrus.org>
Date:	Mon, 11 Feb 2008 07:12:37 -0800
From:	Arjan van de Ven <arjan@...radead.org>
To:	Andi Kleen <ak@...e.de>
Cc:	ying.huang@...el.com, tglx@...utronix.de, mingo@...e.hu,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] [6/8] Account overlapped mappings in end_pfn_map

On Mon, 11 Feb 2008 10:34:34 +0100 (CET)
Andi Kleen <ak@...e.de> wrote:

> 
> When end_pfn is not aligned to 2MB (or 1GB) then the kernel might
> map more memory than end_pfn. Account this in end_pfn_mapped.

we need to fix this btw; mapping memory that doesn't really exist
is a rather nasty trap with cpu prefetching and the like.


-- 
If you want to reach me at my work email, use arjan@...ux.intel.com
For development, discussion and tips for power savings, 
visit http://www.lesswatts.org
--
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/