linux-kernel - [PATCH 3/4] modify account_system_time() to update guest time in cpustat and task

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>] [day] [month] [year] [list]

Message-ID: <46C9939F.90109@bull.net>
Date:	Mon, 20 Aug 2007 15:14:07 +0200
From:	Laurent Vivier <Laurent.Vivier@...l.net>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	kvm-devel <kvm-devel@...ts.sourceforge.net>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	virtualization <virtualization@...ts.linux-foundation.org>
Subject: [PATCH 3/4] modify account_system_time() to update guest time in
 cpustat and task_struct

[PATCH 3/4] modify account_system_time() to add cputime to cpustat->guest if we
are running a VCPU. We add this cputime to  cpustat->user instead of
cpustat->system because this part of KVM code is in fact user code although it
is executed in the kernel. We duplicate VCPU time between guest and user to
allow an unmodified "top(1)" to display correct value. A modified "top(1)" is
able to display good cpu user time and cpu guest time by subtracting cpu guest
time from cpu user time. Update "gtime" in task_struct accordingly.

Signed-off-by: Laurent Vivier <Laurent.Vivier@...l.net>
-- 
------------- Laurent.Vivier@...l.net  --------------
          "Software is hard" - Donald Knuth

View attachment "account_guest" of type "text/plain" (1638 bytes)