From: "Rafael J. Wysocki" <rafael@kernel.org>
To: Thomas Gleixner <tglx@linutronix.de>
Cc: "Michael S. Tsirkin" <mst@redhat.com>,
Jacob Pan <jacob.jun.pan@linux.intel.com>,
"Rafael J. Wysocki" <rafael@kernel.org>,
Yang Zhang <yang.zhang.wz@gmail.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
kvm@vger.kernel.org, Wanpeng Li <wanpeng.li@hotmail.com>,
Paolo Bonzini <pbonzini@redhat.com>,
rkrcmar@redhat.com, David Matlack <dmatlack@google.com>,
Alexander Graf <agraf@suse.de>,
Peter Zijlstra <peterz@infradead.org>,
Len Brown <lenb@kernel.org>, Linux PM <linux-pm@vger.kernel.org>
Subject: Re: [PATCH RFC hack dont apply] intel_idle: support running within a VM
Date: Wed, 4 Oct 2017 22:18:22 +0200 [thread overview]
Message-ID: <CAJZ5v0hZXq1-bWBg8K6dK4UcF98HRyXRay88x2e1UxsfSAunSw@mail.gmail.com> (raw)
In-Reply-To: <alpine.DEB.2.20.1710040955450.1878@nanos>
On Wed, Oct 4, 2017 at 9:56 AM, Thomas Gleixner <tglx@linutronix.de> wrote:
> On Wed, 4 Oct 2017, Michael S. Tsirkin wrote:
>> On Tue, Oct 03, 2017 at 11:02:55PM +0200, Thomas Gleixner wrote:
>> > There is the series from Audrey which makes use of the various idle
>> > prediction mechanisms, scheduler, irq timings, idle governor to get an idea
>> > about the estimated idle time. Exactly this information can be fed to the
>> > kvmidle driver which can act accordingly.
>> >
>> > Hacking a random hardware specific idle driver is definitely the wrong
>> > approach. It might be useful to chain the kvmidle driver and hardware
>> > specific drivers at some point, i.e. if the kvmdriver decides not to exit
>> > it delegates the mwait decision to the proper hardware driver in order not
>> > to reimplement all the required logic again.
>>
>> By making changes to idle core to allow that chaining?
>> Does this sound like something reasonable?
>
> At least for me it makes sense to avoid code duplication.
Well, I agree.
Thanks,
Rafael
next prev parent reply other threads:[~2017-10-04 20:18 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-09-29 22:01 [PATCH RFC hack dont apply] intel_idle: support running within a VM Michael S. Tsirkin
2017-09-29 23:21 ` Rafael J. Wysocki
2017-10-02 17:12 ` Jacob Pan
2017-10-03 21:02 ` Thomas Gleixner
2017-10-04 2:11 ` Michael S. Tsirkin
2017-10-04 7:56 ` Thomas Gleixner
2017-10-04 20:18 ` Rafael J. Wysocki [this message]
2017-10-04 2:09 ` Michael S. Tsirkin
2017-10-04 17:09 ` Jacob Pan
2017-10-04 17:12 ` Michael S. Tsirkin
2017-10-04 18:31 ` Jacob Pan
2017-10-05 10:44 ` Paolo Bonzini
2017-10-06 3:37 ` Michael S. Tsirkin
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