On Mon, Apr 06, 2015 at 03:45:55PM -0400, [email protected] wrote: > From: Chris Metcalf <[email protected]> > > This change allows some cores to be excluded from running the > smp_hotplug_thread tasks. The motivating example for this is > the watchdog threads, which by default we don't want to run > on any enabled nohz_full cores. > > Signed-off-by: Chris Metcalf <[email protected]> > --- > include/linux/smpboot.h | 2 ++ > kernel/smpboot.c | 11 ++++++++--- > 2 files changed, 10 insertions(+), 3 deletions(-) > > diff --git a/include/linux/smpboot.h b/include/linux/smpboot.h > index d600afb21926..de2f64a98108 100644 > --- a/include/linux/smpboot.h > +++ b/include/linux/smpboot.h > @@ -27,6 +27,7 @@ struct smpboot_thread_data; > * @pre_unpark: Optional unpark function, called before the > thread is > * unparked (cpu online). This is not guaranteed to be > * called on the target cpu of the thread. Careful! > + * @exclude_mask: Optional cpumask, specifying cores to exclude. > * @selfparking: Thread is not parked by the park function. > * @thread_comm: The base name of the thread > */ > @@ -41,6 +42,7 @@ struct smp_hotplug_thread { > void (*park)(unsigned int cpu); > void (*unpark)(unsigned int cpu); > void (*pre_unpark)(unsigned int cpu); > + cpumask_t *exclude_mask;
The usual pattern for cpumasks is to use them as affinity values instead of non-affinity values. Thanks. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
