Messages in this thread | | | Date | Sun, 27 Jan 2008 15:48:53 -0800 | From | "Paul E. McKenney" <> | Subject | Re: preemptible RCU bug (was Re: [git pull] scheduler changes for v2.6.25) |
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On Sun, Jan 27, 2008 at 01:26:02PM +0100, Ingo Molnar wrote: > > * 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)
Ah missed that -- thank you for retargeting the patch.
Thanx, Paul
> 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"
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