From: Paolo Bonzini <pbonzini@redhat.com>
To: Thomas Gleixner <tglx@linutronix.de>, Rik van Riel <riel@redhat.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>,
linux-kernel@vger.kernel.org,
Luiz Capitulino <lcapitulino@redhat.com>,
Steven Rostedt <srostedt@redhat.com>,
kvm@vger.kernel.org
Subject: Re: [patch -rt 2/2] KVM: lapic: mark LAPIC timer handler as irqsafe
Date: Thu, 04 Dec 2014 14:53:26 +0100 [thread overview]
Message-ID: <54806756.30503@redhat.com> (raw)
In-Reply-To: <alpine.DEB.2.11.1411252123480.3961@nanos>
On 25/11/2014 21:24, Thomas Gleixner wrote:
> On Tue, 25 Nov 2014, Rik van Riel wrote:
>> On 11/25/2014 12:21 PM, Marcelo Tosatti wrote:
>>> Since lapic timer handler only wakes up a simple waitqueue,
>>> it can be executed from hardirq context.
>>>
>>> Reduces average cyclictest latency by 3us.
>>
>> Can this patch be merged in the KVM tree, and go
>> upstream via Paolo?
>
> Not really as it has RT dependencies ....
Can hrtimer_start_expires even return ETIME on a non-RT kernel? If yes,
I can take patch 2. If not, it's better to keep both patches in the RT
tree.
Paolo
next prev parent reply other threads:[~2014-12-04 13:53 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-11-25 17:21 [patch -rt 0/2] use simple waitqueue for kvm vcpu waitqueue (v2) Marcelo Tosatti
2014-11-25 17:21 ` [patch -rt 1/2] KVM: use simple waitqueue for vcpu->wq Marcelo Tosatti
2014-11-25 18:57 ` Rik van Riel
2014-11-25 19:08 ` Rik van Riel
2014-11-25 19:30 ` Marcelo Tosatti
2014-11-25 20:23 ` Thomas Gleixner
2014-11-25 17:21 ` [patch -rt 2/2] KVM: lapic: mark LAPIC timer handler as irqsafe Marcelo Tosatti
2014-11-25 17:38 ` Paolo Bonzini
2014-11-25 19:01 ` Jan Kiszka
2014-12-04 13:43 ` Marcelo Tosatti
2014-11-25 19:11 ` Rik van Riel
2014-11-25 20:24 ` Thomas Gleixner
2014-12-04 13:53 ` Paolo Bonzini [this message]
2014-12-05 16:17 ` Marcelo Tosatti
-- strict thread matches above, loose matches on Subject: below --
2015-01-21 20:36 [patch -rt 0/2] use simple waitqueue for kvm vcpu waitqueue (v4) Marcelo Tosatti
2015-01-21 20:36 ` [patch -rt 2/2] KVM: lapic: mark LAPIC timer handler as irqsafe Marcelo Tosatti
2015-01-14 17:12 [patch -rt 0/2] use simple waitqueue for kvm vcpu waitqueue (v3) Marcelo Tosatti
2015-01-14 17:12 ` [patch -rt 2/2] KVM: lapic: mark LAPIC timer handler as irqsafe Marcelo Tosatti
2015-01-14 18:23 ` Rik van Riel
2014-11-25 16:45 [patch -rt 0/2] use simple waitqueue for kvm vcpu waitqueue Marcelo Tosatti
2014-11-25 16:45 ` [patch -rt 2/2] KVM: lapic: mark LAPIC timer handler as irqsafe Marcelo Tosatti
2014-11-25 17:10 ` Paolo Bonzini
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=54806756.30503@redhat.com \
--to=pbonzini@redhat.com \
--cc=kvm@vger.kernel.org \
--cc=lcapitulino@redhat.com \
--cc=linux-kernel@vger.kernel.org \
--cc=mtosatti@redhat.com \
--cc=riel@redhat.com \
--cc=srostedt@redhat.com \
--cc=tglx@linutronix.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).