bitmap_parse: Support 'all' semantics

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RCU code supports an 'all' group as a special case when parsing rcu_nocbs
parameter. This patch moves the 'all' support to the core bitmap_parse
code, so that all bitmap users can enjoy this extension.

Moving 'all' parsing to a bitmap_parse level also allows users to pass
patterns together with 'all' in regular group:pattern format, for example,
"rcu_nocbs=all:1/2" would offload all the even-numbered CPUs regardless
of the number of CPUs on the system.

Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Yury Norov <yury.norov@gmail.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>

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Yury Norov 2021-04-20 20:13:25 -07:00 • committed by Paul E. McKenney

parent 6efb943b86

commit b18def121f

3 changed files with 21 additions and 0 deletions

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5

Documentation/admin-guide/kernel-parameters.rst

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9

lib/bitmap.c

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7

lib/test_bitmap.c

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