From: "Paul E. McKenney" <paulmck@kernel.org>
To: linux-kernel@vger.kernel.org
Cc: peterz@infradead.org, yury.norov@gmail.com,
paul.gortmaker@windriver.com, kernel-team@fb.com
Subject: [PATCH RFC cpumask] Allow "all", "none", and "last" in cpumask strings
Date: Tue, 5 Jan 2021 16:48:50 -0800 [thread overview]
Message-ID: <20210106004850.GA11682@paulmck-ThinkPad-P72> (raw)
Hello!
This series allows "all", "none", and "last" to be used in cpumask
strings. This allows these strings to be less dependent on the underlying
system. For example, currently a string specifying all but the first
CPU must be "1-7" on an eight-CPU system and "1-15" on a 16-CPU system.
With this series, the single string "1-last" can be used regardless of the
number of CPUs (at least assuming that each system has at least one CPU).
1. Un-inline cpulist_parse for SMP; prepare for ascii helpers,
courtesy of Paul Gortmaker.
2. Make "all" alias global and not just RCU, courtesy of Paul
Gortmaker.
3. Add a "none" alias to complement "all", courtesy of Paul
Gortmaker.
4. Add "last" alias for cpu list specifications, courtesy of Paul
Gortmaker.
5. Use "all" and "last" in "nohz_full" and "rcu_nocbs".
Thanx, Paul
------------------------------------------------------------------------
Documentation/admin-guide/kernel-parameters.rst | 20 +
Documentation/admin-guide/kernel-parameters.txt | 4
include/linux/cpumask.h | 8
kernel/rcu/tree_plugin.h | 13 -
lib/cpumask.c | 136 ++++++++++++-
tools/testing/selftests/rcutorture/configs/rcu/TREE04.boot | 2
tools/testing/selftests/rcutorture/configs/rcu/TREE08.boot | 2
7 files changed, 169 insertions(+), 16 deletions(-)
next reply other threads:[~2021-01-06 0:49 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-06 0:48 Paul E. McKenney [this message]
2021-01-06 0:49 ` [PATCH RFC cpumask 1/5] cpumask: Un-inline cpulist_parse for SMP; prepare for ascii helpers paulmck
2021-01-06 0:49 ` [PATCH RFC cpumask 2/5] cpumask: Make "all" alias global and not just RCU paulmck
2021-01-06 6:32 ` Yury Norov
2021-01-06 0:49 ` [PATCH RFC cpumask 3/5] cpumask: Add a "none" alias to complement "all" paulmck
2021-01-06 6:59 ` Yury Norov
2021-01-06 0:49 ` [PATCH RFC cpumask 4/5] cpumask: Add "last" alias for cpu list specifications paulmck
2021-01-06 8:41 ` Yury Norov
2021-01-06 9:49 ` Peter Zijlstra
2021-01-06 17:45 ` Paul Gortmaker
2021-01-06 21:16 ` Yury Norov
2021-01-07 14:18 ` Peter Zijlstra
2021-01-07 14:47 ` Paul E. McKenney
2021-01-07 14:59 ` Peter Zijlstra
2021-01-07 15:32 ` Paul E. McKenney
2021-01-07 15:05 ` Paul E. McKenney
2021-01-06 0:49 ` [PATCH RFC cpumask 5/5] rcutorture: Use "all" and "last" in "nohz_full" and "rcu_nocbs" paulmck
2021-01-06 8:49 ` [PATCH RFC cpumask] Allow "all", "none", and "last" in cpumask strings Yury Norov
2021-01-21 7:11 ` Yury Norov
2021-01-21 16:57 ` Paul E. McKenney
2021-01-21 21:39 ` Paul E. McKenney
2021-01-21 22:42 ` Paul Gortmaker
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