linux-kernel - [PATCH tip/core/rcu 0/2] Add "all" to bitmap ranges

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Message-ID: <20210511224115.GA2892092@paulmck-ThinkPad-P17-Gen-1>
Date:   Tue, 11 May 2021 15:41:15 -0700
From:   "Paul E. McKenney" <paulmck@...nel.org>
To:     rcu@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, kernel-team@...com, mingo@...nel.org,
        jiangshanlai@...il.com, akpm@...ux-foundation.org,
        mathieu.desnoyers@...icios.com, josh@...htriplett.org,
        tglx@...utronix.de, peterz@...radead.org, rostedt@...dmis.org,
        dhowells@...hat.com, edumazet@...gle.com, fweisbec@...il.com,
        oleg@...hat.com, joel@...lfernandes.org
Subject: [PATCH tip/core/rcu 0/2] Add "all" to bitmap ranges

Hello!

This series adds "all" as a first-class bitmap range, for example so that
"rcu_nocbs=all:1/2" would offload all the even-numbered CPUs regardless
of the number of CPUs on the system.

1.	bitmap_parse: Support 'all' semantics, courtesy of Yury Norov.

2.	rcu/tree_plugin: Don't handle the case of 'all' CPU range,
	courtesy of Yury Norov.

						Thanx, Paul

------------------------------------------------------------------------

 Documentation/admin-guide/kernel-parameters.rst |    5 +++++
 kernel/rcu/tree_plugin.h                        |    9 +++------
 lib/bitmap.c                                    |    9 +++++++++
 lib/test_bitmap.c                               |    7 +++++++
 4 files changed, 24 insertions(+), 6 deletions(-)