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a81aeaf7a1
Currently cpumask_available() is used to prevent from unwanted NOCB initialization. However if neither "rcu_nocbs=" nor "nohz_full=" parameters are passed to a kernel built with CONFIG_CPUMASK_OFFSTACK=n, the initialization path is still taken, running through all sorts of needless operations and iterations on an empty cpumask. Fix this by relying on a real initialization state instead. This also optimizes kthread creation, preventing needless iteration over all online CPUs when the kernel is booted without any offloaded CPUs. Reviewed-by: Neeraj Upadhyay <quic_neeraju@quicinc.com> Signed-off-by: Frederic Weisbecker <frederic@kernel.org> Cc: Boqun Feng <boqun.feng@gmail.com> Cc: Uladzislau Rezki <urezki@gmail.com> Cc: Josh Triplett <josh@joshtriplett.org> Cc: Joel Fernandes <joel@joelfernandes.org> Tested-by: Juri Lelli <juri.lelli@redhat.com> Signed-off-by: Paul E. McKenney <paulmck@kernel.org> |
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| .. | ||
| Kconfig | ||
| Kconfig.debug | ||
| Makefile | ||
| rcu.h | ||
| rcu_segcblist.c | ||
| rcu_segcblist.h | ||
| rcuscale.c | ||
| rcutorture.c | ||
| refscale.c | ||
| srcutiny.c | ||
| srcutree.c | ||
| sync.c | ||
| tasks.h | ||
| tiny.c | ||
| tree.c | ||
| tree.h | ||
| tree_exp.h | ||
| tree_nocb.h | ||
| tree_plugin.h | ||
| tree_stall.h | ||
| update.c | ||