From: Frederic Weisbecker <frederic@kernel.org>
To: LKML <linux-kernel@vger.kernel.org>
Cc: Frederic Weisbecker <frederic@kernel.org>,
Tejun Heo <tj@kernel.org>, Peter Zijlstra <peterz@infradead.org>,
Juri Lelli <juri.lelli@redhat.com>,
Alex Belits <abelits@marvell.com>, Nitesh Lal <nilal@redhat.com>,
Thomas Gleixner <tglx@linutronix.de>,
Nicolas Saenz <nsaenzju@redhat.com>,
Christoph Lameter <cl@gentwo.de>,
Marcelo Tosatti <mtosatti@redhat.com>,
Zefan Li <lizefan.x@bytedance.com>,
cgroups@vger.kernel.org
Subject: [RFC PATCH 0/6] cpuset: Allow to modify isolcpus through cpuset
Date: Wed, 14 Jul 2021 15:54:14 +0200 [thread overview]
Message-ID: <20210714135420.69624-1-frederic@kernel.org> (raw)
The fact that "isolcpus=" behaviour can't be modified at runtime is an
eternal source of discussion and debate opposing a useful feature against
a terrible interface.
I've long since tried to figure out a proper way to control this at
runtime using cpusets, which isn't easy as a boot time single cpumask
is difficult to map to a hierarchy of cpusets that can even overlap.
The idea here is to map the boot-set isolation behaviour to any cpuset
directory whose cpumask is a subset of "isolcpus=". I let you browse
for details on the last patch.
Note this is still WIP and half-baked, but I figured it's important to
validate the interface early.
git://git.kernel.org/pub/scm/linux/kernel/git/frederic/linux-dynticks.git
cpuset/isolation
HEAD: 6d3dba1115b7ea464febf3763244c783e87c7baf
Thanks,
Frederic
---
Frederic Weisbecker (6):
pci: Decouple HK_FLAG_WQ and HK_FLAG_DOMAIN cpumask fetch
workqueue: Decouple HK_FLAG_WQ and HK_FLAG_DOMAIN cpumask fetch
net: Decouple HK_FLAG_WQ and HK_FLAG_DOMAIN cpumask fetch
sched/isolation: Split domain housekeeping mask from the rest
sched/isolation: Make HK_FLAG_DOMAIN mutable
cpuset: Add cpuset.isolation_mask file
drivers/pci/pci-driver.c | 21 ++++++--
include/linux/sched/isolation.h | 4 ++
kernel/cgroup/cpuset.c | 111 ++++++++++++++++++++++++++++++++++++++--
kernel/sched/isolation.c | 73 ++++++++++++++++++++++----
kernel/workqueue.c | 4 +-
net/core/net-sysfs.c | 6 +--
6 files changed, 196 insertions(+), 23 deletions(-)
next reply other threads:[~2021-07-14 13:54 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-14 13:54 Frederic Weisbecker [this message]
2021-07-14 13:54 ` [RFC PATCH 1/6] pci: Decouple HK_FLAG_WQ and HK_FLAG_DOMAIN cpumask fetch Frederic Weisbecker
2021-07-14 13:54 ` [RFC PATCH 2/6] workqueue: " Frederic Weisbecker
2021-07-14 13:54 ` [RFC PATCH 3/6] net: " Frederic Weisbecker
2021-07-14 13:54 ` [RFC PATCH 4/6] sched/isolation: Split domain housekeeping mask from the rest Frederic Weisbecker
2021-07-14 13:54 ` [RFC PATCH 5/6] sched/isolation: Make HK_FLAG_DOMAIN mutable Frederic Weisbecker
2021-07-21 14:28 ` Vincent Donnefort
2021-07-14 13:54 ` [RFC PATCH 6/6] cpuset: Add cpuset.isolation_mask file Frederic Weisbecker
2021-07-14 16:31 ` Marcelo Tosatti
2021-07-19 13:26 ` Frederic Weisbecker
2021-07-19 15:41 ` Marcelo Tosatti
2021-07-14 16:52 ` Peter Zijlstra
2021-07-14 23:13 ` Frederic Weisbecker
2021-07-14 23:44 ` Valentin Schneider
2021-07-15 0:07 ` Frederic Weisbecker
2021-07-15 9:04 ` Peter Zijlstra
2021-07-19 13:17 ` Frederic Weisbecker
2021-07-16 18:02 ` [RFC PATCH 0/6] cpuset: Allow to modify isolcpus through cpuset Waiman Long
2021-07-19 13:57 ` Frederic Weisbecker
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