From: Peter Zijlstra <peterz@infradead.org>
To: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Suleiman Souhlal <suleiman@google.com>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
Paolo Bonzini <pbonzini@redhat.com>,
Sean Christopherson <seanjc@google.com>,
Vitaly Kuznetsov <vkuznets@redhat.com>,
Wanpeng Li <wanpengli@tencent.com>,
Jim Mattson <jmattson@google.com>, Joerg Roedel <joro@8bytes.org>,
Juri Lelli <juri.lelli@redhat.com>,
Vincent Guittot <vincent.guittot@linaro.org>,
Dietmar Eggemann <dietmar.eggemann@arm.com>,
Steven Rostedt <rostedt@goodmis.org>,
Ben Segall <bsegall@google.com>, Mel Gorman <mgorman@suse.de>,
Daniel Bristot de Oliveira <bristot@redhat.com>,
ssouhlal@freebsd.org, joelaf@google.com,
senozhatsky@chromium.org, linux-kernel@vger.kernel.org,
kvm@vger.kernel.org, Nitesh Narayan Lal <nitesh@redhat.com>,
Nicolas Saenz Julienne <nsaenzju@redhat.com>
Subject: Re: [RFC PATCH 0/2] KVM: Support Heterogeneous RT VCPU Configurations.
Date: Wed, 28 Jul 2021 12:46:00 +0200 [thread overview]
Message-ID: <YQE1aB0/6B1FReZg@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <20210728103253.GB7633@fuller.cnet>
On Wed, Jul 28, 2021 at 07:32:53AM -0300, Marcelo Tosatti wrote:
> Peter, not sure what exactly are you thinking of? (to solve this
> particular problem with pv deadline scheduling).
>
> Shouldnt it be possible to, through paravirt locks, boost the priority
> of the non-RT vCPU (when locking fails in the -RT vCPU) ?
No. Static priority scheduling does not compose. Any scheme that relies
on the guest behaving 'nice' is unacceptable.
next prev parent reply other threads:[~2021-07-28 10:46 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-28 7:36 Suleiman Souhlal
2021-07-28 7:36 ` [RFC PATCH 1/2] kvm,x86: Support heterogeneous RT VCPU configurations Suleiman Souhlal
2021-07-28 8:15 ` Vitaly Kuznetsov
2021-07-28 7:37 ` [RFC PATCH 2/2] kvm,x86: Report preempt_count to host Suleiman Souhlal
2021-07-28 8:18 ` Vitaly Kuznetsov
2021-07-28 8:10 ` [RFC PATCH 0/2] KVM: Support Heterogeneous RT VCPU Configurations Peter Zijlstra
2021-07-28 10:32 ` Marcelo Tosatti
2021-07-28 10:37 ` Suleiman Souhlal
2021-07-28 10:46 ` Peter Zijlstra [this message]
2021-07-30 9:09 ` Suleiman Souhlal
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=YQE1aB0/6B1FReZg@hirez.programming.kicks-ass.net \
--to=peterz@infradead.org \
--cc=bp@alien8.de \
--cc=bristot@redhat.com \
--cc=bsegall@google.com \
--cc=dietmar.eggemann@arm.com \
--cc=hpa@zytor.com \
--cc=jmattson@google.com \
--cc=joelaf@google.com \
--cc=joro@8bytes.org \
--cc=juri.lelli@redhat.com \
--cc=kvm@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=mgorman@suse.de \
--cc=mingo@redhat.com \
--cc=mtosatti@redhat.com \
--cc=nitesh@redhat.com \
--cc=nsaenzju@redhat.com \
--cc=pbonzini@redhat.com \
--cc=rostedt@goodmis.org \
--cc=seanjc@google.com \
--cc=senozhatsky@chromium.org \
--cc=ssouhlal@freebsd.org \
--cc=suleiman@google.com \
--cc=tglx@linutronix.de \
--cc=vincent.guittot@linaro.org \
--cc=vkuznets@redhat.com \
--cc=wanpengli@tencent.com \
--cc=x86@kernel.org \
/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
all inboxes | Powered by JetHome®