linux-kernel - Re: [PATCH/RFC 3/4]Introduce "account modifiers" mechanism

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, 17 Aug 2007 08:39:15 +1000
From:	Rusty Russell <rusty@...tcorp.com.au>
To:	Laurent Vivier <Laurent.Vivier@...l.net>
Cc:	kvm-devel@...ts.sourceforge.net, Ingo Molnar <mingo@...e.hu>,
	virtualization <virtualization@...ts.linux-foundation.org>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH/RFC 3/4]Introduce "account modifiers" mechanism

On Thu, 2007-08-16 at 17:58 +0200, Laurent Vivier wrote:
> [PATCH 3/3] introduce "account modifiers" mechanism in the kernel allowing a
> module to modify the collected accounting for a given task. This implementation
> is based on the "preempt_notifier". "account_system_time()" and
> "account_user_time()" can call functions registered by a module to modify the
> cputime value.
> 
> Signed-off-by: Laurent Vivier <Laurent.Vivier@...l.net>


Hi Laurent,

	This seems a little like overkill.  Why not just add an
"account_guest_time" which subtracts the given amount of time from
system time (if available) and adds it to guest time?  Then kvm (and
lguest) should just need to call this at the right times.

Am I missing something?
Rusty.


-
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/