From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
To: Yury Norov <yury.norov@gmail.com>
Cc: linux-kernel@vger.kernel.org, rcu@vger.kernel.org,
linux-doc@vger.kernel.org,
Andrew Morton <akpm@linux-foundation.org>,
"Paul E. McKenney" <paulmck@kernel.org>,
Joel Fernandes <joel@joelfernandes.org>,
Jonathan Corbet <corbet@lwn.net>,
Lai Jiangshan <jiangshanlai@gmail.com>,
Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
Palmer Dabbelt <palmerdabbelt@google.com>,
Paul Gortmaker <paul.gortmaker@windriver.com>,
Randy Dunlap <rdunlap@infradead.org>,
Rasmus Villemoes <linux@rasmusvillemoes.dk>,
Steven Rostedt <rostedt@goodmis.org>
Subject: Re: [PATCH 0/2] bitmap_parselist: support 'all' semantics
Date: Tue, 20 Apr 2021 13:19:11 +0300 [thread overview]
Message-ID: <YH6qnzU9iCg6Fvjs@smile.fi.intel.com> (raw)
In-Reply-To: <20210420000131.21038-1-yury.norov@gmail.com>
On Mon, Apr 19, 2021 at 05:01:29PM -0700, Yury Norov wrote:
> RCU code supports a special group 'all' which selects all bits in a bitmap.
> We have recently added 'N' extension for bitmap parse, so that '0-N' would
> have exactly the same meaning as 'all'. But because the 'all' is already
> used by RCU, it would be reasonable to support it in core bitmap code as a
> common and easy-readable alias for '0-N'.
>
> Moving the 'all' support to core bitmap code adds another level of
> flexibility for system configuration by supporting patterns. For example,
> every second bit in cpumask may be selected like this:
> isolcpus=all:1/2
After addressing a couple of nit-picks,
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
> Yury Norov (2):
> bitmap_parse: support 'all' semantics
> rcu/tree_plugin: don't handle the case of 'all' CPU range
>
> Documentation/admin-guide/kernel-parameters.rst | 5 +++++
> kernel/rcu/tree_plugin.h | 9 +++------
> lib/bitmap.c | 9 +++++++++
> lib/test_bitmap.c | 8 +++++++-
> 4 files changed, 24 insertions(+), 7 deletions(-)
>
> --
> 2.25.1
>
--
With Best Regards,
Andy Shevchenko
prev parent reply other threads:[~2021-04-20 10:19 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-20 0:01 [PATCH 0/2] bitmap_parselist: support 'all' semantics Yury Norov
2021-04-20 0:01 ` [PATCH 1/2] bitmap_parse: " Yury Norov
2021-04-20 10:17 ` Andy Shevchenko
2021-04-20 19:32 ` Yury Norov
2021-04-20 0:01 ` [PATCH 2/2] rcu/tree_plugin: don't handle the case of 'all' CPU range Yury Norov
2021-04-20 10:18 ` Andy Shevchenko
2021-04-20 19:38 ` Yury Norov
2021-04-20 10:19 ` Andy Shevchenko [this message]
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