From: Paolo Bonzini <pbonzini@redhat.com>
To: Sean Christopherson <seanjc@google.com>,
Shrikanth Hegde <sshegde@linux.ibm.com>
Cc: mingo@redhat.com, peterz@infradead.org, juri.lelli@redhat.com,
vincent.guittot@linaro.org, tglx@linutronix.de,
yury.norov@gmail.com, maddy@linux.ibm.com,
linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org,
gregkh@linuxfoundation.org, vschneid@redhat.com,
iii@linux.ibm.com, huschle@linux.ibm.com, rostedt@goodmis.org,
dietmar.eggemann@arm.com, vineeth@bitbyteword.org,
jgross@suse.com
Subject: Re: [RFC PATCH v3 00/10] paravirt CPUs and push task for less vCPU preemption
Date: Mon, 20 Oct 2025 17:05:37 +0200 [thread overview]
Message-ID: <cfc43786-5a9d-4813-b8ac-a8a55f430f03@redhat.com> (raw)
In-Reply-To: <aPZIGCFk-Rnlc1yT@google.com>
On 10/20/25 16:32, Sean Christopherson wrote:
> : Till the hint from underlying hypervisor arrives, another idea is to
> : approximate the hint from steal time.
I think this is the first thing to look at.
Perhaps single_task_running() can be exposed in the x86 steal time data
structure, and in fact even in the rseq data for non-VM usecases? This
is not specific to VMs and I'd like the steal time implementation to
follow the footsteps of rseq rather than the opposite.
Paolo
next prev parent reply other threads:[~2025-10-20 15:05 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-09-10 17:42 Shrikanth Hegde
2025-09-10 17:42 ` [RFC PATCH v3 01/10] sched/docs: Document cpu_paravirt_mask and Paravirt CPU concept Shrikanth Hegde
2025-09-10 17:42 ` [RFC PATCH v3 02/10] cpumask: Introduce cpu_paravirt_mask Shrikanth Hegde
2025-09-10 17:42 ` [RFC PATCH v3 03/10] sched: Static key to check paravirt cpu push Shrikanth Hegde
2025-09-11 1:53 ` Yury Norov
2025-09-11 14:37 ` Shrikanth Hegde
2025-09-11 15:29 ` Yury Norov
2025-09-10 17:42 ` [RFC PATCH v3 04/10] sched/core: Dont allow to use CPU marked as paravirt Shrikanth Hegde
2025-09-11 5:16 ` K Prateek Nayak
2025-09-11 14:44 ` Shrikanth Hegde
2025-09-10 17:42 ` [RFC PATCH v3 05/10] sched/fair: Don't consider paravirt CPUs for wakeup and load balance Shrikanth Hegde
2025-09-11 5:23 ` K Prateek Nayak
2025-09-11 15:56 ` Shrikanth Hegde
2025-09-11 16:55 ` K Prateek Nayak
2025-11-08 12:04 ` Shrikanth Hegde
2025-09-10 17:42 ` [RFC PATCH v3 06/10] sched/rt: Don't select paravirt CPU for wakeup and push/pull rt task Shrikanth Hegde
2025-09-10 17:42 ` [RFC PATCH v3 07/10] sched/core: Push current task from paravirt CPU Shrikanth Hegde
2025-09-11 5:40 ` K Prateek Nayak
2025-09-11 16:52 ` Shrikanth Hegde
2025-09-11 17:06 ` K Prateek Nayak
2025-09-12 5:22 ` Shrikanth Hegde
2025-09-12 8:48 ` K Prateek Nayak
2025-09-12 12:49 ` Shrikanth Hegde
2025-11-10 4:54 ` Shrikanth Hegde
2025-09-10 17:42 ` [RFC PATCH v3 08/10] sysfs: Add paravirt CPU file Shrikanth Hegde
2025-09-10 17:42 ` [RFC PATCH v3 09/10] powerpc: Add debug file for set/unset paravirt CPUs Shrikanth Hegde
2025-09-10 17:42 ` [HELPER PATCH] sysfs: Provide write method for paravirt Shrikanth Hegde
2025-10-20 14:32 ` [RFC PATCH v3 00/10] paravirt CPUs and push task for less vCPU preemption Sean Christopherson
2025-10-20 15:05 ` Paolo Bonzini [this message]
2025-10-23 4:03 ` Shrikanth Hegde
2025-10-21 6:10 ` Shrikanth Hegde
2025-10-22 18:46 ` Sean Christopherson
2025-10-30 17:43 ` Shrikanth Hegde
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=cfc43786-5a9d-4813-b8ac-a8a55f430f03@redhat.com \
--to=pbonzini@redhat.com \
--cc=dietmar.eggemann@arm.com \
--cc=gregkh@linuxfoundation.org \
--cc=huschle@linux.ibm.com \
--cc=iii@linux.ibm.com \
--cc=jgross@suse.com \
--cc=juri.lelli@redhat.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linuxppc-dev@lists.ozlabs.org \
--cc=maddy@linux.ibm.com \
--cc=mingo@redhat.com \
--cc=peterz@infradead.org \
--cc=rostedt@goodmis.org \
--cc=seanjc@google.com \
--cc=sshegde@linux.ibm.com \
--cc=tglx@linutronix.de \
--cc=vincent.guittot@linaro.org \
--cc=vineeth@bitbyteword.org \
--cc=vschneid@redhat.com \
--cc=yury.norov@gmail.com \
/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®