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| author | Sebastian Andrzej Siewior <bigeasy@linutronix.de> | 2016-11-02 17:30:02 +0100 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2017-01-16 16:56:39 -0800 |
| commit | 7c6094db591b320332441e5f169156a4255b2180 (patch) | |
| tree | 6dac53785ec6746f82e720f52ca327d6cea48753 /init | |
| parent | 52d7e48b86fc108e45a656d8e53e4237993c481d (diff) | |
| download | lwn-7c6094db591b320332441e5f169156a4255b2180.tar.gz lwn-7c6094db591b320332441e5f169156a4255b2180.zip | |
rcu: update: Make RCU_EXPEDITE_BOOT be the default
RCU_EXPEDITE_BOOT should speed up the boot process by enforcing
synchronize_rcu_expedited() instead of synchronize_rcu() during the boot
process. There should be no reason why one does not want this and there
is no need worry about real time latency at this point.
Therefore make it default.
Note that users wishing to avoid expediting entirely, for example when
bringing up new hardware possibly having flaky IPIs, can use the
rcu_normal boot parameter to override boot-time expediting.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
[ paulmck: Reworded commit log. ]
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Diffstat (limited to 'init')
| -rw-r--r-- | init/Kconfig | 13 |
1 files changed, 0 insertions, 13 deletions
diff --git a/init/Kconfig b/init/Kconfig index 223b734abccd..96e6d56acd50 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -781,19 +781,6 @@ config RCU_NOCB_CPU_ALL endchoice -config RCU_EXPEDITE_BOOT - bool - default n - help - This option enables expedited grace periods at boot time, - as if rcu_expedite_gp() had been invoked early in boot. - The corresponding rcu_unexpedite_gp() is invoked from - rcu_end_inkernel_boot(), which is intended to be invoked - at the end of the kernel-only boot sequence, just before - init is exec'ed. - - Accept the default if unsure. - endmenu # "RCU Subsystem" config BUILD_BIN2C |