linux-kernel - Re: [PATCH 00 of 36] x86/paravirt: groundwork for 64-bit Xen support

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:	Wed, 25 Jun 2008 14:40:20 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Jeremy Fitzhardinge <jeremy@...p.org>
Cc:	Mark McLoughlin <markmc@...hat.com>,
	xen-devel <xen-devel@...ts.xensource.com>,
	Eduardo Habkost <ehabkost@...hat.com>,
	Stephen Tweedie <sct@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 00 of 36] x86/paravirt: groundwork for 64-bit Xen support

Jeremy Fitzhardinge <jeremy@...p.org> writes:
>
> This moves __PAGE_OFFSET up by 16 GDT slots, from 0xffff810000000000

GDT?  PDP?

> to 0xffff880000000000.  I have no general justification for this: th

This will significantly decrease the maximum amount of physical
memory supported by Linux longer term.

> "x86_64: PSE no longer a hard requirement."
>
> Because booting under Xen doesn't set PSE, it's no longer a hard
> requirement for the kernel.  PSE will be used whereever possible.

Both sound like cases of "let's hack Linux to work around Xen 
problems"

-Andi
--
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/