srcu: Automatically determine size-transition strategy at boot

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This commit adds a srcutree.convert_to_big option of zero that causes
SRCU to decide at boot whether to wait for contention (small systems) or
immediately expand to large (large systems).  A new srcutree.big_cpu_lim
(defaulting to 128) defines how many CPUs constitute a large system.

Co-developed-by: Neeraj Upadhyay <quic_neeraju@quicinc.com>
Signed-off-by: Neeraj Upadhyay <quic_neeraju@quicinc.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>

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Paul E. McKenney 2022-01-31 11:21:30 -08:00

parent 9f2e91d94c

commit a57ffb3c6b

2 changed files with 30 additions and 3 deletions

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10

Documentation/admin-guide/kernel-parameters.txt

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23

kernel/rcu/srcutree.c

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