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| author | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2015-11-25 18:56:00 -0800 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2015-12-04 12:26:54 -0800 |
| commit | 3e42ec1aa716f10c68294b8492ae3ea684528699 (patch) | |
| tree | be431b624157914bd08d965fed9423fe267ff927 /Documentation/kernel-parameters.txt | |
| parent | 967dcb8fe6a9a75be346400539261e0416baf370 (diff) | |
| download | lwn-3e42ec1aa716f10c68294b8492ae3ea684528699.tar.gz lwn-3e42ec1aa716f10c68294b8492ae3ea684528699.zip | |
rcu: Allow expedited grace periods to be disabled at init
Expedited grace periods can speed up boot, but are undesirable in
aggressive real-time systems. This commit therefore introduces a
kernel parameter rcupdate.rcu_normal_after_boot that disables
expedited grace periods just before init is spawned.
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Diffstat (limited to 'Documentation/kernel-parameters.txt')
| -rw-r--r-- | Documentation/kernel-parameters.txt | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index 7673943d3085..197305bbb9b7 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -3318,6 +3318,11 @@ bytes respectively. Such letter suffixes can also be entirely omitted. grace-period latency. This parameter overrides rcupdate.rcu_expedited. + rcupdate.rcu_normal_after_boot= [KNL] + Once boot has completed (that is, after + rcu_end_inkernel_boot() has been invoked), use + only normal grace-period primitives. + rcupdate.rcu_task_stall_timeout= [KNL] Set timeout in jiffies for RCU task stall warning messages. Disable with a value less than or equal |