On Tue, Apr 23, 2013 at 2:40 PM, Mats Liljegren <liljegren.ma...@gmail.com> wrote: > I'm trying to test your new branch timers/nohz-help-testing. > > Since I'm using ARM, I cherry-picket a few of Kevin's commits from his > arm-nohz-v3/context-tracking branch. It is based on an older version > of NOHZ, but I think the context tracking and virtual CPU accounting > should be pretty much the same. If not, then that might be the reason > for my problems below... > > I'm unable to select CONFIG_NO_HZ_FULL. It misses > CONFIG_VIRT_CPU_ACCOUNTING_GEN. I have CONFIG_VIRT_CPU_ACCOUNTING set > by CONFIG_VIRT_CPU_ACCOUNTING_NATIVE though, but this didn't help. > > With below change I could at least go on with fixing compile errors: > > diff --git a/kernel/time/Kconfig b/kernel/time/Kconfig > index e1ac129..cd00820 100644 > --- a/kernel/time/Kconfig > +++ b/kernel/time/Kconfig > @@ -106,7 +106,7 @@ config NO_HZ_FULL > depends on HAVE_CONTEXT_TRACKING > # RCU_NOCB_CPU dependency > depends on TREE_RCU || TREE_PREEMPT_RCU > - depends on VIRT_CPU_ACCOUNTING_GEN > + depends on VIRT_CPU_ACCOUNTING > select NO_HZ_COMMON > select RCU_USER_QS > select RCU_NOCB_CPU > > /Mats
Forget the above mail, I was too picky in my cherry-picking... When I applied Kevins 64-bit fixes for VIRT_CPU_ACCOUNTING, I could select VIRT_CPU_ACCOUNTING_GEN and get NO_HZ_FULL. I think the naming is somewhat confusing, since VIRT_CPU_ACCOUNTING_GEN is required by NO_HZ_FULL, VIRT_CPU_ACCOUNTING_NATIVE is apparently not suitable for some reason. Both VIRT_CPU_ACCOUNTING_(GEN|NATIVE) selects VIRT_CPU_ACCOUNTING, making at least my head spin... Sorry for the confusion... /Mats -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
