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| author | Frederic Weisbecker <fweisbec@gmail.com> | 2013-04-18 00:15:40 +0200 |
|---|---|---|
| committer | Frederic Weisbecker <fweisbec@gmail.com> | 2013-04-18 18:53:34 +0200 |
| commit | 76c24fb054b52b34af4dcde589cbb9e2b98fc74c (patch) | |
| tree | bbce968d4f057dce3b028ca5c5b894e68255db02 /kernel/time/Kconfig | |
| parent | 65d798f0f9339ae2c4ebe9480e3260b33382a584 (diff) | |
| download | lwn-76c24fb054b52b34af4dcde589cbb9e2b98fc74c.tar.gz lwn-76c24fb054b52b34af4dcde589cbb9e2b98fc74c.zip | |
nohz: New APIs to re-evaluate the tick on full dynticks CPUs
Provide two new helpers in order to notify the full dynticks CPUs about
some internal system changes against which they may reconsider the state
of their tick. Some practical examples include: posix cpu timers, perf tick
and sched clock tick.
For now the notifying handler, implemented through IPIs, is a stub
that will be implemented when we get the tick stop/restart infrastructure
in.
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Chris Metcalf <cmetcalf@tilera.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Geoff Levand <geoff@infradead.org>
Cc: Gilad Ben Yossef <gilad@benyossef.com>
Cc: Hakan Akkan <hakanakkan@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Kevin Hilman <khilman@linaro.org>
Cc: Li Zhong <zhong@linux.vnet.ibm.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'kernel/time/Kconfig')
| -rw-r--r-- | kernel/time/Kconfig | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/kernel/time/Kconfig b/kernel/time/Kconfig index 358d601a4fec..fbb4c7eb92a0 100644 --- a/kernel/time/Kconfig +++ b/kernel/time/Kconfig @@ -111,6 +111,7 @@ config NO_HZ_FULL select RCU_USER_QS select RCU_NOCB_CPU select CONTEXT_TRACKING_FORCE + select IRQ_WORK help Adaptively try to shutdown the tick whenever possible, even when the CPU is running tasks. Typically this requires running a single |