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| author |   Paul E. McKenney <paulmck@kernel.org> | 2022-08-04 16:07:04 -0700 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@kernel.org> | 2022-08-31 05:08:08 -0700 |
| commit | 258f887aba60c8fc7946a9f379f9a3889f92fc85 (patch) | |
| tree | 8af1e32a635fe50b2e4b2324e29d72a9d88d349f /tools/perf/scripts/python/call-graph-from-sql.py | |
| parent | rcu: Add full-sized polling for cond_sync_exp_full() (diff) | |
| download | linux-dev-258f887aba60c8fc7946a9f379f9a3889f92fc85.tar.xz linux-dev-258f887aba60c8fc7946a9f379f9a3889f92fc85.zip | |
rcu: Disable run-time single-CPU grace-period optimization
The run-time single-CPU grace-period optimization applies only to
kernels built with CONFIG_SMP=y && CONFIG_PREEMPTION=y that are running
on a single-CPU system. But a kernel intended for a single-CPU system
should instead be built with CONFIG_SMP=n, and in any case, single-CPU
systems running Linux no longer appear to be the common case. Plus this
optimization results in the rcu_gp_oldstate structure being half again
larger than it needs to be.
This commit therefore disables the run-time single-CPU grace-period
optimization, so that this optimization applies only during the
pre-scheduler portion of the boot sequence.
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Diffstat (limited to 'tools/perf/scripts/python/call-graph-from-sql.py')
0 files changed, 0 insertions, 0 deletions