Messages in this thread Patch in this message | | | Date | Sun, 27 Jan 2008 13:26:02 +0100 | From | Ingo Molnar <> | Subject | Re: preemptible RCU bug (was Re: [git pull] scheduler changes for v2.6.25) |
| |
* Paul E. McKenney <paulmck@linux.vnet.ibm.com> wrote:
> > Sorry, no help available for this option yet. > > Good catch!!! > > This patch supplies help text for the "RCU implementation type" kernel > configuration choice.
thanks applied to sched.git. (see the patch below - the config option is in init/Kconfig in mainline, not in kernel/Kconfig.preempt)
Ingo
-------------> Subject: RCU: add help text for "RCU implementation type" From: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
This patch supplies help text for the "RCU implementation type" kernel configuration choice.
Reported-by: Stefan Richter <stefanr@s5r6.in-berlin.de> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> ---
init/Kconfig | 8 ++++++++ 1 file changed, 8 insertions(+)
Index: linux/init/Kconfig =================================================================== --- linux.orig/init/Kconfig +++ linux/init/Kconfig @@ -779,6 +779,14 @@ config PREEMPT_NOTIFIERS choice prompt "RCU implementation type:" default CLASSIC_RCU + help + This allows you to choose either the classic RCU implementation + that is designed for best read-side performance on non-realtime + systems, or the preemptible RCU implementation for best latency + on realtime systems. Note that some kernel preemption modes + will restrict your choice. + + Select the default if you are unsure. config CLASSIC_RCU bool "Classic RCU"
| |