From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753301AbbBMUmk (ORCPT ); Fri, 13 Feb 2015 15:42:40 -0500 Received: from e32.co.us.ibm.com ([32.97.110.150]:39298 "EHLO e32.co.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752737AbbBMUmj (ORCPT ); Fri, 13 Feb 2015 15:42:39 -0500 Date: Fri, 13 Feb 2015 12:42:35 -0800 From: "Paul E. McKenney" To: Paul Clarke Cc: "linuxppc-dev@lists.ozlabs.org" , linux-kernel@vger.kernel.org Subject: Re: [PATCH] powerpc: re-enable dynticks Message-ID: <20150213204234.GA8884@linux.vnet.ibm.com> Reply-To: paulmck@linux.vnet.ibm.com References: <54DE52BC.3020303@us.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <54DE52BC.3020303@us.ibm.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 15021320-0005-0000-0000-000008C86835 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Feb 13, 2015 at 01:38:36PM -0600, Paul Clarke wrote: > implement arch_irq_work_has_interrupt() for powerpc > > Commit 9b01f5bf3 introduced a dependency on "IRQ work self-IPIs" for > full dynamic ticks to be enabled, by expecting architectures to > implement a suitable arch_irq_work_has_interrupt() routine. > > Several arches have implemented this routine, including x86 > (3010279f) and arm (09f6edd4), but powerpc was omitted. > > This patch implements this routine for powerpc. > > The symptom, at boot (on powerpc arch systems) with "nohz_full= list>" is displayed: > NO_HZ: Can't run full dynticks because arch doesn't support irq > work self-IPIs > > after this patch: > NO_HZ: Full dynticks CPUs: . > > Tested against 3.19. > > CC: Frederic Weisbecker > CC: Paul E. McKenney > Signed-off-by: Paul A. Clarke Acked-by: Paul E. McKenney > diff --git a/arch/powerpc/include/asm/irq_work.h > b/arch/powerpc/include/asm/irq_work.h > new file mode 100644 > index 0000000..18365ec > --- /dev/null > +++ b/arch/powerpc/include/asm/irq_work.h > @@ -0,0 +1,11 @@ > +#ifndef _ASM_IRQ_WORK_H > +#define _ASM_IRQ_WORK_H > + > +#include > + > +static inline bool arch_irq_work_has_interrupt(void) > +{ > + return 1; > +} > + > +#endif /* _ASM_IRQ_WORK_H */ > > -- > Regards, > Paul Clarke, IBM > > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/