From: Frederic Weisbecker <fweisbec@gmail.com>
To: Christopher Lameter <cl@linux.com>
Cc: LKML <linux-kernel@vger.kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
Chris Metcalf <cmetcalf@mellanox.com>,
Thomas Gleixner <tglx@linutronix.de>,
Luiz Capitulino <lcapitulino@redhat.com>,
"Paul E . McKenney" <paulmck@linux.vnet.ibm.com>,
Ingo Molnar <mingo@kernel.org>, Mike Galbraith <efault@gmx.de>,
Rik van Riel <riel@redhat.com>, Wanpeng Li <kernellwp@gmail.com>
Subject: Re: [RFC PATCH 12/12] housekeeping: Reimplement isolcpus on housekeeping
Date: Thu, 24 Aug 2017 15:19:58 +0200 [thread overview]
Message-ID: <20170824131955.GA18351@lerouge> (raw)
In-Reply-To: <alpine.DEB.2.20.1708230954240.23600@nuc-kabylake>
On Wed, Aug 23, 2017 at 09:55:51AM -0500, Christopher Lameter wrote:
> On Wed, 23 Aug 2017, Frederic Weisbecker wrote:
>
> > While at it, this is a proposition for a reimplementation of isolcpus=
> > that doesn't involve scheduler domain isolation. Therefore this
> > brings a behaviour change: all user tasks inherit init/1 affinity which
> > avoid the isolcpus= range. But if a task later overrides its affinity
> > which turns out to intersect an isolated CPU, load balancing may occur
> > on it.
>
> I think that change is good maybe even a bugfix. I had some people be very
> surprised when they set affinities to multiple cpus and the processeds
> kept sticking to one cpu because of isolcpus.
That's good to hear! I'll keep that direction then, unless someone complains.
next prev parent reply other threads:[~2017-08-24 13:21 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-08-23 1:50 [RFC 00/12] Introduce housekeeping subsystem v2 Frederic Weisbecker
2017-08-23 1:51 ` [RFC PATCH 01/12] housekeeping: Move housekeeping related code to its own file Frederic Weisbecker
2017-08-31 20:16 ` Rik van Riel
2017-08-31 22:58 ` Frederic Weisbecker
2017-08-23 1:51 ` [RFC PATCH 02/12] watchdog: Use housekeeping_cpumask() instead of ad-hoc version Frederic Weisbecker
2017-08-23 1:51 ` [RFC PATCH 03/12] housekeeping: Provide a dynamic off-case to housekeeping_any_cpu() Frederic Weisbecker
2017-08-23 1:51 ` [RFC PATCH 04/12] housekeeping: Make housekeeping cpumask private Frederic Weisbecker
2017-08-23 1:51 ` [RFC PATCH 05/12] housekeeping: Use its own static key Frederic Weisbecker
2017-08-23 1:51 ` [RFC PATCH 06/12] housekeeping: Rename is_housekeeping_cpu to housekeeping_cpu Frederic Weisbecker
2017-08-23 1:51 ` [RFC PATCH 07/12] housekeeping: Move it under own config, independant from NO_HZ Frederic Weisbecker
2017-08-23 1:51 ` [RFC PATCH 08/12] housekeeping: Introduce housekeeping flags Frederic Weisbecker
2017-08-23 1:51 ` [RFC PATCH 09/12] workqueue: Affine unbound workqueues to housekeeping cpumask Frederic Weisbecker
2017-08-23 1:51 ` [RFC PATCH 10/12] housekeeping: Affine unbound kthreads Frederic Weisbecker
2017-08-23 1:51 ` [RFC PATCH 11/12] housekeeping: Handle nohz_full= parameter Frederic Weisbecker
2017-08-23 1:51 ` [RFC PATCH 12/12] housekeeping: Reimplement isolcpus on housekeeping Frederic Weisbecker
2017-08-23 14:55 ` Christopher Lameter
2017-08-24 13:19 ` Frederic Weisbecker [this message]
2017-08-28 10:10 ` Peter Zijlstra
2017-08-28 15:38 ` Christopher Lameter
2017-08-28 10:09 ` Peter Zijlstra
2017-08-28 13:23 ` Frederic Weisbecker
2017-08-28 13:31 ` Peter Zijlstra
2017-08-28 15:27 ` Frederic Weisbecker
2017-08-28 16:24 ` Peter Zijlstra
2017-08-28 16:53 ` Christopher Lameter
2017-08-28 17:33 ` Frederic Weisbecker
2017-08-31 18:53 ` Thomas Gleixner
2017-08-31 23:00 ` Frederic Weisbecker
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=20170824131955.GA18351@lerouge \
--to=fweisbec@gmail.com \
--cc=cl@linux.com \
--cc=cmetcalf@mellanox.com \
--cc=efault@gmx.de \
--cc=kernellwp@gmail.com \
--cc=lcapitulino@redhat.com \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@kernel.org \
--cc=paulmck@linux.vnet.ibm.com \
--cc=peterz@infradead.org \
--cc=riel@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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.