linux-kernel - Re: [RFC PATCH 10/11] nohz,kvm,time: skip vtime accounting at kernel entry & exit

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Message-ID: <CALCETrXZ2360GD7dqbsNRob=REn+ADfE3VA4tpzEUfVD2XiKTQ@mail.gmail.com>
Date:	Wed, 24 Jun 2015 08:08:03 -0700
From:	Andy Lutomirski <luto@...capital.net>
To:	Rik van Riel <riel@...hat.com>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	fweisbec@...hat.com, Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...nel.org>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [RFC PATCH 10/11] nohz,kvm,time: skip vtime accounting at kernel
 entry & exit

On Wed, Jun 24, 2015 at 7:57 AM,  <riel@...hat.com> wrote:
> From: Rik van Riel <riel@...hat.com>
>
> When timer statistics are sampled from a remote CPU, vtime calculations
> at the kernel/user and kernel/guest boundary are no longer necessary.
> Skip them.

I plan to do my very best to clean up x86's calls into this code, but
I will try to avoid touching the implementations.  I'm happy to leave
an eventual cleanup to you :)

--Andy
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