From: luca abeni <luca.abeni@santannapisa.it>
To: Tejun Heo <tj@kernel.org>
Cc: "Sebastian Andrzej Siewior" <bigeasy@linutronix.de>,
linux-rt-devel@lists.linux.dev, cgroups@vger.kernel.org,
linux-kernel@vger.kernel.org, "Ingo Molnar" <mingo@redhat.com>,
"Peter Zijlstra" <peterz@infradead.org>,
"Juri Lelli" <juri.lelli@redhat.com>,
"Vincent Guittot" <vincent.guittot@linaro.org>,
"Dietmar Eggemann" <dietmar.eggemann@arm.com>,
"Steven Rostedt" <rostedt@goodmis.org>,
"K Prateek Nayak" <kprateek.nayak@amd.com>,
"Johannes Weiner" <hannes@cmpxchg.org>,
"Michal Koutný" <mkoutny@suse.com>,
"John Ogness" <john.ogness@linutronix.de>,
"Shrikanth Hegde" <sshegde@linux.ibm.com>,
"Yuri Andriaccio" <yurand2000@gmail.com>,
"Yuri Andriaccio" <yuri.andriaccio@santannapisa.it>
Subject: Re: [RFC] RT throttling, DL/ fair server, RT_GROUP_SCHED and everything
Date: Fri, 23 Oct 2026 19:19:26 +0200 [thread overview]
Message-ID: <20261023191926.7458ab76@nowhere> (raw)
In-Reply-To: <f29f77edb2776b734306fd482b47a64f@kernel.org>
Hi all,
On Fri, 23 Oct 2026 07:16:10 -1000
Tejun Heo <tj@kernel.org> wrote:
> Hello, Sebastian.
>
> On Fri, Oct 23, 2026 at 06:13:48PM +0200, Sebastian Andrzej Siewior
> wrote:
> > - Remove CONFIG_RT_GROUP_SCHED
> > [ ] Yes [ ] No, because
> > _____________________
>
> RT_GROUP_SCHED in its current form isn't widely useful. No major
> distro kernel enables it (Fedora, RHEL/CentOS Stream, Debian, Ubuntu,
> openSUSE, Arch and the Android GKI defconfig, PREEMPT_RT flavors
> included). I have no objection to removing it.
>
> There was an attempt to make it more useful: the Hierarchical Constant
> Bandwidth Server (HCBS) patchset from Yuri Andriaccio and Luca Abeni.
> It replaces RT_GROUP_SCHED with per-cgroup deadline servers and a
> cgroup2 interface. The last posting was RFC v6 in June:
>
> https://lore.kernel.org/all/20260608121546.69910-1-yurand2000@gmail.com/
>
> The effort seems to have stalled.
Yuri is working on an updated version of the patchset... If everything
goes well, a new RFC should arrive in few weeks :)
Luca
next prev parent reply other threads:[~2026-10-23 17:19 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-23 16:13 [RFC] RT throttling, DL/ fair server, RT_GROUP_SCHED and everything Sebastian Andrzej Siewior
2026-10-23 17:16 ` Tejun Heo
2026-10-23 17:19 ` luca abeni [this message]
2026-10-23 20:07 ` Sebastian Andrzej Siewior
2026-10-26 8:05 ` Juri Lelli
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