linux-kernel - Re: [PATCH 0/6] section name cleanup for mn10300

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:	Fri, 01 May 2009 16:03:25 +0100
From:	David Howells <dhowells@...hat.com>
To:	Sam Ravnborg <sam@...nborg.org>
Cc:	dhowells@...hat.com, Tim Abbott <tabbott@....EDU>,
	Linux kernel mailing list <linux-kernel@...r.kernel.org>,
	Anders Kaseorg <andersk@....EDU>,
	Waseem Daher <wdaher@....EDU>,
	Denys Vlasenko <vda.linux@...glemail.com>,
	Jeff Arnold <jbarnold@....EDU>
Subject: Re: [PATCH 0/6] section name cleanup for mn10300

Sam Ravnborg <sam@...nborg.org> wrote:

> I also thing 5/6 is wrong as it moves
> init_task befoe _edata.
> 
> Could you try to back out them one by one
> to see which one causes the extra memory waste.

Moving init_task around is the culprit.

I guess the extra page has a 50% chance of being leaked anyway, as it depends
on the alignment of the previous section.

I can probably make the kernel reclaim it by sticking a label either side of
the alignment and if they're more than a page apart, reclaim the page that
ends at the second label.

David
--
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/