From: Mike Galbraith <umgwanakikbuti@gmail.com>
To: Rik van Riel <riel@redhat.com>
Cc: Sasha Levin <levinsasha928@gmail.com>,
Frederic Weisbecker <fweisbec@gmail.com>,
Ingo Molnar <mingo@kernel.org>,
LKML <linux-kernel@vger.kernel.org>,
Chris Metcalf <cmetcalf@ezchip.com>,
"Rafael J . Wysocki" <rafael.j.wysocki@intel.com>,
Peter Zijlstra <peterz@infradead.org>,
Dave Jones <davej@redhat.com>,
Thomas Gleixner <tglx@linutronix.de>,
Oleg Nesterov <oleg@redhat.com>,
"Paul E . McKenney" <paulmck@linux.vnet.ibm.com>,
Ingo Molnar <mingo@redhat.com>,
Martin Schwidefsky <schwidefsky@de.ibm.com>
Subject: Re: [PATCH 4/4] nohz: Set isolcpus when nohz_full is set
Date: Mon, 18 May 2015 05:29:16 +0200 [thread overview]
Message-ID: <1431919756.2518.51.camel@gmail.com> (raw)
In-Reply-To: <55594BC0.9070005@redhat.com>
On Sun, 2015-05-17 at 22:17 -0400, Rik van Riel wrote:
> On 05/17/2015 01:30 AM, Mike Galbraith wrote:
>
> > Given that kernel initiated association to isolcpus, a user turning
> > NO_HZ_FULL_ALL on had better not have much generic load to manage. If
> > he/she does not have CPUSETS enabled, or should Rik's patch rendering
> > isolcpus immutable be merged,
>
> My patch does not aim to make isolcpus immutable, it aims to make
> isolcpus resistent to system management tools (like libvirt)
> automatically undoing isolcpus the instant a cpuset with the default
> cpus (inherited from the root group) is created.
Aim or not, if cpusets is the sole modifier, it'll render isolcpus
immutable, no? Cpusets could grow an override to the override I
suppose, to regain control of the resource it thinks it manages.
-Mike
next prev parent reply other threads:[~2015-05-18 3:29 UTC|newest]
Thread overview: 94+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-06 16:04 [GIT PULL] nohz: A few improvements v4 Frederic Weisbecker
2015-05-06 16:04 ` [PATCH 1/4] context_tracking: Protect against recursion Frederic Weisbecker
2015-05-07 9:58 ` Ingo Molnar
2015-05-07 11:53 ` Frederic Weisbecker
2015-05-07 11:31 ` [tip:timers/nohz] " tip-bot for Frederic Weisbecker
2015-05-06 16:04 ` [PATCH 2/4] context_tracking: Inherit TIF_NOHZ through forks instead of context switches Frederic Weisbecker
2015-05-07 11:31 ` [tip:timers/nohz] " tip-bot for Frederic Weisbecker
2015-05-06 16:04 ` [PATCH 3/4] nohz: Add tick_nohz_full_add_cpus_to() API Frederic Weisbecker
2015-05-07 11:31 ` [tip:timers/nohz] " tip-bot for Chris Metcalf
2015-05-06 16:04 ` [PATCH 4/4] nohz: Set isolcpus when nohz_full is set Frederic Weisbecker
2015-05-07 11:32 ` [tip:timers/nohz] " tip-bot for Chris Metcalf
2015-05-16 19:39 ` [PATCH 4/4] " Sasha Levin
2015-05-17 5:30 ` Mike Galbraith
2015-05-18 2:17 ` Rik van Riel
2015-05-18 3:29 ` Mike Galbraith [this message]
2015-05-18 14:07 ` Rik van Riel
2015-05-18 14:22 ` Mike Galbraith
2015-05-18 14:52 ` Rik van Riel
2015-05-19 2:30 ` Mike Galbraith
2015-06-12 19:12 ` Rik van Riel
2015-05-20 20:38 ` Afzal Mohammed
2015-05-20 21:00 ` Paul E. McKenney
2015-05-21 12:12 ` Afzal Mohammed
2015-05-21 12:57 ` Paul E. McKenney
2015-05-21 13:06 ` Frederic Weisbecker
2015-05-21 13:27 ` Paul E. McKenney
2015-05-21 13:29 ` Afzal Mohammed
2015-05-21 14:14 ` Paul E. McKenney
2015-05-21 14:46 ` Frederic Weisbecker
2015-05-21 18:59 ` Mike Galbraith
2015-05-22 14:39 ` Frederic Weisbecker
2015-05-22 15:20 ` Mike Galbraith
-- strict thread matches above, loose matches on Subject: below --
2015-04-24 15:58 [PATCH 0/4] nohz: A few improvements v3 Frederic Weisbecker
2015-04-24 15:58 ` [PATCH 4/4] nohz: Set isolcpus when nohz_full is set Frederic Weisbecker
2015-04-24 20:07 ` Gene Heskett
2015-04-25 23:13 ` Frederic Weisbecker
2015-04-25 23:50 ` Gene Heskett
2015-04-21 12:23 [PATCH 0/4] nohz: A few improvements v2 Frederic Weisbecker
2015-04-21 12:23 ` [PATCH 4/4] nohz: Set isolcpus when nohz_full is set Frederic Weisbecker
2015-04-03 16:24 [PATCH 1/2] nohz: add tick_nohz_full_set_cpus() API cmetcalf
2015-04-03 16:24 ` [PATCH 2/2] nohz: make nohz_full imply isolcpus cmetcalf
2015-04-03 17:42 ` Frederic Weisbecker
2015-04-03 19:20 ` Chris Metcalf
2015-04-04 14:10 ` Rik van Riel
2015-04-04 17:09 ` Chris Metcalf
2015-04-05 5:05 ` Ingo Molnar
2015-04-06 17:15 ` Chris Metcalf
2015-04-06 18:16 ` [PATCH v2 1/2] nohz: add tick_nohz_full_clear_cpus() and _set_cpus() APIs cmetcalf
2015-04-06 18:16 ` [PATCH v2 2/2] nohz: make nohz_full imply isolcpus cmetcalf
2015-04-07 22:29 ` Frederic Weisbecker
2015-04-08 9:41 ` Peter Zijlstra
2015-04-08 14:04 ` Chris Metcalf
2015-04-08 14:26 ` Peter Zijlstra
2015-04-08 15:21 ` Chris Metcalf
2015-04-08 17:24 ` Frederic Weisbecker
2015-04-08 19:20 ` [PATCH v3 1/2] nohz: add tick_nohz_full_clear_cpus() and _set_cpus() APIs cmetcalf
2015-04-08 19:20 ` [PATCH v3 2/2] nohz: set isolcpus when nohz_full is set cmetcalf
2015-04-08 17:27 ` [PATCH v2 2/2] nohz: make nohz_full imply isolcpus Peter Zijlstra
2015-04-08 18:12 ` Chris Metcalf
2015-04-09 8:29 ` Peter Zijlstra
2015-04-09 12:02 ` Chris Metcalf
2015-04-09 12:45 ` Frederic Weisbecker
2015-04-09 16:59 ` [PATCH v5] nohz: set isolcpus when nohz_full is set Chris Metcalf
2015-04-09 17:12 ` Peter Zijlstra
2015-04-10 1:05 ` Mike Galbraith
2015-04-10 15:33 ` Chris Metcalf
2015-04-10 15:57 ` Mike Galbraith
2015-04-09 17:00 ` [PATCH v4 1/2] nohz: add tick_nohz_full_cpumask_or() and _andnot() APIs Chris Metcalf
2015-04-09 17:00 ` [PATCH v4 2/2] nohz: set isolcpus when nohz_full is set Chris Metcalf
2015-04-09 17:07 ` [PATCH v4 1/2] nohz: add tick_nohz_full_cpumask_or() and _andnot() APIs Peter Zijlstra
2015-04-09 17:24 ` Chris Metcalf
2015-04-09 17:42 ` Peter Zijlstra
2015-04-09 18:01 ` [PATCH v6 1/2] nohz: add tick_nohz_full_add_cpus_to() and _remove_cpus_from() APIs Chris Metcalf
2015-04-09 18:01 ` [PATCH v6 2/2] nohz: set isolcpus when nohz_full is set Chris Metcalf
2015-04-10 1:37 ` Frederic Weisbecker
2015-04-10 20:53 ` [PATCH v7 1/2] nohz: add tick_nohz_full_add_cpus_to() and _remove_cpus_from() APIs Chris Metcalf
2015-04-10 20:53 ` [PATCH v7 2/2] nohz: set isolcpus when nohz_full is set Chris Metcalf
2015-04-14 0:37 ` Frederic Weisbecker
2015-04-14 15:17 ` [PATCH v8 1/2] nohz: add tick_nohz_full_add_cpus_to() API Chris Metcalf
2015-04-14 15:17 ` [PATCH v8 2/2] nohz: set isolcpus when nohz_full is set Chris Metcalf
2015-04-14 15:26 ` Frederic Weisbecker
2015-04-14 16:45 ` Peter Zijlstra
2015-04-14 0:33 ` [PATCH v7 1/2] nohz: add tick_nohz_full_add_cpus_to() and _remove_cpus_from() APIs Frederic Weisbecker
2015-04-14 0:49 ` Chris Metcalf
2015-04-14 15:34 ` Frederic Weisbecker
2015-04-10 1:34 ` [PATCH v6 " Frederic Weisbecker
2015-04-10 15:31 ` Chris Metcalf
2015-04-06 18:29 ` [PATCH v2 1/2] nohz: add tick_nohz_full_clear_cpus() and _set_cpus() APIs Frederic Weisbecker
2015-04-06 19:09 ` Chris Metcalf
2015-04-07 9:33 ` Ingo Molnar
2015-04-03 18:08 ` [PATCH 2/2] nohz: make nohz_full imply isolcpus Mike Galbraith
2015-04-03 19:21 ` Chris Metcalf
2015-04-04 2:03 ` Mike Galbraith
2015-04-04 3:43 ` Mike Galbraith
2015-04-06 19:28 ` Rik van Riel
2015-04-07 3:10 ` Mike Galbraith
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=1431919756.2518.51.camel@gmail.com \
--to=umgwanakikbuti@gmail.com \
--cc=cmetcalf@ezchip.com \
--cc=davej@redhat.com \
--cc=fweisbec@gmail.com \
--cc=levinsasha928@gmail.com \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@kernel.org \
--cc=mingo@redhat.com \
--cc=oleg@redhat.com \
--cc=paulmck@linux.vnet.ibm.com \
--cc=peterz@infradead.org \
--cc=rafael.j.wysocki@intel.com \
--cc=riel@redhat.com \
--cc=schwidefsky@de.ibm.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.