From: Frederic Weisbecker <frederic@kernel.org>
To: Ingo Molnar <mingo@kernel.org>
Cc: LKML <linux-kernel@vger.kernel.org>,
Frederic Weisbecker <frederic@kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
Chris Metcalf <cmetcalf@mellanox.com>,
Thomas Gleixner <tglx@linutronix.de>,
Luiz Capitulino <lcapitulino@redhat.com>,
Christoph Lameter <cl@linux.com>,
"Paul E . McKenney" <paulmck@linux.vnet.ibm.com>,
Mike Galbraith <efault@gmx.de>, Rik van Riel <riel@redhat.com>,
Wanpeng Li <kernellwp@gmail.com>
Subject: [PATCH 12/12] housekeeping: Document isolcpus flags
Date: Fri, 27 Oct 2017 04:42:39 +0200 [thread overview]
Message-ID: <1509072159-31808-13-git-send-email-frederic@kernel.org> (raw)
In-Reply-To: <1509072159-31808-1-git-send-email-frederic@kernel.org>
Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
Cc: Chris Metcalf <cmetcalf@mellanox.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Christoph Lameter <cl@linux.com>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Wanpeng Li <kernellwp@gmail.com>
Cc: Luiz Capitulino <lcapitulino@redhat.com>
---
Documentation/admin-guide/kernel-parameters.txt | 35 +++++++++++++++----------
1 file changed, 21 insertions(+), 14 deletions(-)
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index 6b99c8b..5853618 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -1727,20 +1727,27 @@
isapnp= [ISAPNP]
Format: <RDP>,<reset>,<pci_scan>,<verbosity>
- isolcpus= [KNL,SMP] Isolate CPUs from the general scheduler.
- The argument is a cpu list, as described above.
-
- This option can be used to specify one or more CPUs
- to isolate from the general SMP balancing and scheduling
- algorithms. You can move a process onto or off an
- "isolated" CPU via the CPU affinity syscalls or cpuset.
- <cpu number> begins at 0 and the maximum value is
- "number of CPUs in system - 1".
-
- This option is the preferred way to isolate CPUs. The
- alternative -- manually setting the CPU mask of all
- tasks in the system -- can cause problems and
- suboptimal load balancer performance.
+ isolcpus= [KNL,SMP] Isolate a given set of CPUs from disturbance.
+ Format: [flag-list,]<cpu-list>
+
+ Specify one or more CPUs to isolate from disturbances
+ specified in the flag list (default: domain):
+
+ nohz
+ Disable the tick when a single task runs.
+ domain
+ Isolate from the general SMP balancing and scheduling
+ algorithms. This option is the preferred way to isolate
+ CPUs from tasks. The alternative -- manually setting the
+ CPU mask of all tasks in the system, can cause problems
+ and suboptimal load balancer performance. You can move a
+ process onto or off an "isolated" CPU via the CPU
+ affinity syscalls or cpuset. <cpu number> begins at 0
+ and the maximum value is "number of CPUs in system - 1".
+
+ The format of <cpu-list> is described above.
+
+
iucv= [HW,NET]
--
2.7.4
next prev parent reply other threads:[~2017-10-27 2:43 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-10-27 2:42 [GIT PULL] Housekeeping subsystem v6 Frederic Weisbecker
2017-10-27 2:42 ` [PATCH 01/12] housekeeping: Move housekeeping related code to its own file Frederic Weisbecker
2017-10-27 12:01 ` [tip:sched/core] sched/isolation: " tip-bot for Frederic Weisbecker
2017-10-27 2:42 ` [PATCH 02/12] watchdog: Use housekeeping_cpumask() instead of ad-hoc version Frederic Weisbecker
2017-10-27 12:02 ` [tip:sched/core] sched/isolation, " tip-bot for Frederic Weisbecker
2017-10-27 2:42 ` [PATCH 03/12] housekeeping: Provide a dynamic off-case to housekeeping_any_cpu() Frederic Weisbecker
2017-10-27 12:02 ` [tip:sched/core] sched/isolation: " tip-bot for Frederic Weisbecker
2017-10-27 2:42 ` [PATCH 04/12] housekeeping: Make housekeeping cpumask private Frederic Weisbecker
2017-10-27 12:03 ` [tip:sched/core] sched/isolation: Make the " tip-bot for Frederic Weisbecker
2017-10-27 2:42 ` [PATCH 05/12] housekeeping: Use its own static key Frederic Weisbecker
2017-10-27 12:03 ` [tip:sched/core] sched/isolation: " tip-bot for Frederic Weisbecker
2017-10-27 2:42 ` [PATCH 06/12] housekeeping: Rename is_housekeeping_cpu to housekeeping_cpu Frederic Weisbecker
2017-10-27 12:03 ` [tip:sched/core] sched/isolation: Rename is_housekeeping_cpu() to housekeeping_cpu() tip-bot for Frederic Weisbecker
2017-10-27 2:42 ` [PATCH 07/12] housekeeping: Move it under its own config, independent from NO_HZ Frederic Weisbecker
2017-10-27 12:04 ` [tip:sched/core] sched/isolation: Split out new CONFIG_CPU_ISOLATION=y config from CONFIG_NO_HZ_FULL tip-bot for Frederic Weisbecker
2017-10-27 2:42 ` [PATCH 08/12] housekeeping: Introduce housekeeping flags Frederic Weisbecker
2017-10-27 12:04 ` [tip:sched/core] sched/isolation: " tip-bot for Frederic Weisbecker
2017-10-27 2:42 ` [PATCH 09/12] housekeeping: Handle the nohz_full= parameter Frederic Weisbecker
2017-10-27 12:05 ` [tip:sched/core] sched/isolation: " tip-bot for Frederic Weisbecker
2017-10-27 2:42 ` [PATCH 10/12] housekeeping: Move isolcpus to housekeeping Frederic Weisbecker
2017-10-27 12:05 ` [tip:sched/core] sched/isolation: Move isolcpus= handling to the housekeeping code tip-bot for Frederic Weisbecker
2017-10-27 2:42 ` [PATCH 11/12] housekeeping: Add basic isolcpus flags Frederic Weisbecker
2017-10-27 12:05 ` [tip:sched/core] sched/isolation: " tip-bot for Frederic Weisbecker
2017-10-27 2:42 ` Frederic Weisbecker [this message]
2017-10-27 12:06 ` [tip:sched/core] sched/isolation: Document the isolcpus= flags tip-bot for Frederic Weisbecker
2017-10-27 13:58 ` Peter Zijlstra
2017-10-27 14:36 ` Frederic Weisbecker
2017-10-27 17:06 ` Ingo Molnar
2017-10-27 17:33 ` Frederic Weisbecker
2017-10-27 18:21 ` Ingo Molnar
2017-10-27 18:39 ` Frederic Weisbecker
2017-10-27 19:04 ` Ingo Molnar
2017-10-27 14:38 ` Mike Galbraith
2017-10-30 15:48 ` Christopher Lameter
2017-10-30 16:11 ` Peter Zijlstra
2017-10-30 16:30 ` Christopher Lameter
2017-10-30 16:58 ` Peter Zijlstra
2017-10-30 16:56 ` Mike Galbraith
-- strict thread matches above, loose matches on Subject: below --
2017-10-24 13:06 [GIT PULL] Introduce housekeeping subsystem v5 Frederic Weisbecker
2017-10-24 13:07 ` [PATCH 12/12] housekeeping: Document isolcpus flags Frederic Weisbecker
2017-09-18 13:53 [GIT PULL] Introduce housekeeping subsystem v4 Frederic Weisbecker
2017-09-18 13:54 ` [PATCH 12/12] housekeeping: Document isolcpus flags Frederic Weisbecker
2017-09-01 16:41 [PATCH 00/12] Introduce housekeeping subsystem v3 Frederic Weisbecker
2017-09-01 16:41 ` [PATCH 12/12] housekeeping: Document isolcpus flags Frederic Weisbecker
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