srcu: Dynamically allocate srcu_node array

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This commit shrinks the srcu_struct structure by converting its ->node
field from a fixed-size compile-time array to a pointer to a dynamically
allocated array.  In kernels built with large values of NR_CPUS that boot
on systems with smaller numbers of CPUs, this can save significant memory.

[ paulmck: Apply kernel test robot feedback. ]

Reported-by: A cast of thousands
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>

...

This commit is contained in:

Paul E. McKenney 2022-01-21 16:13:52 -08:00

parent 994f706872

commit 2ec303113d

2 changed files with 51 additions and 16 deletions

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2

include/linux/srcutree.h

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65

kernel/rcu/srcutree.c

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