linux-kernel - Re: [PATCH 1/6] UML - Deal with host time going backwards

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, 4 Jun 2008 01:12:34 -0400
From:	Daniel Hazelton <dhazelton@...er.net>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>
Cc:	Jeff Dike <jdike@...toit.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Nix <nix@...eri.org.uk>, linux-kernel@...r.kernel.org,
	user-mode-linux-devel@...ts.sourceforge.net
Subject: Re: [PATCH 1/6] UML - Deal with host time going backwards

On Tuesday 03 June 2008 09:50:49 pm Eric W. Biederman wrote:
> Jeff Dike <jdike@...toit.com> writes:
> > On Tue, Jun 03, 2008 at 01:07:09PM -0700, Andrew Morton wrote:
> >> So if I change the host's time by an hour, the time will not advance at
> >> all on the guest for the next hour? Sounds suboptimal :)
> >
> > It is, but if the host is whacked, the guest just has to do the best that
> > it can...
>
> Could using a CLOCK_MONOTONIC time source fix this?  Those timers do not
> change when we change the time on the host.
>
> Eric

I'm not all that familiar with the specifics of the code - my original 
statements about possible causes were barely more than wild guesses - but 
this does sound like it would work.

DRH

-- 
Dialup is like pissing through a pipette. Slow and excruciatingly painful.
--
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/