On Tue, Mar 31, 2015 at 10:58:41PM +0200, Frederic Weisbecker wrote: > On Tue, Mar 31, 2015 at 03:25:59PM -0400, cmetc...@ezchip.com wrote: > > From: Chris Metcalf <cmetc...@ezchip.com> > > > > When queuing work, we should avoid queuing it on the local cpu if > > we are using WORK_CPU_UNBOUND and the local cpu is nohz_full, since > > the workqueue will mean a later interrupt of the nohz_full process > > that presumably would prefer continuing to have 100% of the core > > without interrupts. > > > > Likewise, remove the nohz_full cores from unbound workqueues. If > > all the cores are nohz_full, we leave them in. > > > > Signed-off-by: Chris Metcalf <cmetc...@ezchip.com> > > Lai is already working on this: https://lkml.org/lkml/2015/3/12/27 > > All that will be needed after this patchset is to force the desired > unbound workqueue mask on boot.
This applies to per-cpu workqueues too, not just unbound workqueues. Thanks. -- tejun -- 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/
