From mboxrd@z Thu Jan 1 00:00:00 1970 From: Frederic Weisbecker Subject: Re: [PATCH v2 10/44] cpuidle,armada: Push RCU-idle into driver Date: Mon, 19 Sep 2022 16:39:07 +0200 Message-ID: <20220919143907.GB61009@lothringen> References: <20220919095939.761690562@infradead.org> <20220919101521.004425686@infradead.org> Mime-Version: 1.0 Return-path: DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1663598350; bh=EYlJ8II0nMQUwIjH0JUADdeT52M2bVXh8wZ8I7YWDZQ=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=s3+f9C0KTVjmYUPiubcRMi8XIY5SJMP0244Vb1fXbwXdFHK2Bm2BwTTQiaCHZh9e8 gk+RkXTCbQvo+kjvjvWXHkL/k/NseZ0cbkyw2yDh2rZtKAxwlQOJfRciHvpbPx0lTm fDHS2etEOvPkeXqxMZO/oK5HOJhYIwkHmqYibhK+OB+2c+J+ST7lgkwPFAFcYkZbFW MXfD5dFjyN8rnPvB9qABtdA2rx/c5tMG/PNclmQth0MoJSBvpOxArLP6yCDHF7fpUw gdJXH8PHYrPCe2KnzR/yv4vNUQpksjg/NG4m1Xvw5PY6ek342QURnNGyGExrAr8OtZ QX22S+N/3elJw== Content-Disposition: inline In-Reply-To: <20220919101521.004425686@infradead.org> List-ID: Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Peter Zijlstra Cc: richard.henderson@linaro.org, ink@jurassic.park.msu.ru, mattst88@gmail.com, vgupta@kernel.org, linux@armlinux.org.uk, ulli.kroll@googlemail.com, linus.walleij@linaro.org, shawnguo@kernel.org, Sascha Hauer , kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com, tony@atomide.com, khilman@kernel.org, catalin.marinas@arm.com, will@kernel.org, guoren@kernel.org, bcain@quicinc.com, chenhuacai@kernel.org, kernel@xen0n.name, geert@linux-m68k.org, sammy@sammy.net, monstr@monstr.eu, tsbogend@alpha.franken.de, dinguyen@kernel.org, jonas@southpole.se, stefan.kristiansson@saunalahti.fi, shorne@gmail.com, James.Bottomley@HansenPartnership.com, deller@gmx.de, mpe@ellerman.id.au, npiggin@gmail.com, christophe.leroy@csgroup.eu, paul.walmsley@sifive.com, palmer@dabbel On Mon, Sep 19, 2022 at 11:59:49AM +0200, Peter Zijlstra wrote: > Doing RCU-idle outside the driver, only to then temporarily enable it > again before going idle is daft. Ah wait, now I see, that's cpu_pm_enter()/cpu_pm_exit() -> cpu_pm_notify*() the culprits. Might be worth adding a short note about that on your changelogs. > > Signed-off-by: Peter Zijlstra (Intel) > --- > drivers/cpuidle/cpuidle-mvebu-v7.c | 7 +++++++ > 1 file changed, 7 insertions(+) > > --- a/drivers/cpuidle/cpuidle-mvebu-v7.c > +++ b/drivers/cpuidle/cpuidle-mvebu-v7.c > @@ -36,7 +36,10 @@ static int mvebu_v7_enter_idle(struct cp > if (drv->states[index].flags & MVEBU_V7_FLAG_DEEP_IDLE) > deepidle = true; > > + ct_idle_enter(); > ret = mvebu_v7_cpu_suspend(deepidle); > + ct_idle_exit(); And then yes of course: Reviewed-by: Frederic Weisbecker From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8F2F1C6FA86 for ; Mon, 19 Sep 2022 14:39:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230142AbiISOjU (ORCPT ); Mon, 19 Sep 2022 10:39:20 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43694 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230078AbiISOjP (ORCPT ); Mon, 19 Sep 2022 10:39:15 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 32228B85A; Mon, 19 Sep 2022 07:39:13 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id B1E25B81BB2; Mon, 19 Sep 2022 14:39:11 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 64C85C433D6; Mon, 19 Sep 2022 14:39:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1663598350; bh=EYlJ8II0nMQUwIjH0JUADdeT52M2bVXh8wZ8I7YWDZQ=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=s3+f9C0KTVjmYUPiubcRMi8XIY5SJMP0244Vb1fXbwXdFHK2Bm2BwTTQiaCHZh9e8 gk+RkXTCbQvo+kjvjvWXHkL/k/NseZ0cbkyw2yDh2rZtKAxwlQOJfRciHvpbPx0lTm fDHS2etEOvPkeXqxMZO/oK5HOJhYIwkHmqYibhK+OB+2c+J+ST7lgkwPFAFcYkZbFW MXfD5dFjyN8rnPvB9qABtdA2rx/c5tMG/PNclmQth0MoJSBvpOxArLP6yCDHF7fpUw gdJXH8PHYrPCe2KnzR/yv4vNUQpksjg/NG4m1Xvw5PY6ek342QURnNGyGExrAr8OtZ QX22S+N/3elJw== Date: Mon, 19 Sep 2022 16:39:07 +0200 From: Frederic Weisbecker To: Peter Zijlstra Cc: richard.henderson@linaro.org, ink@jurassic.park.msu.ru, mattst88@gmail.com, vgupta@kernel.org, linux@armlinux.org.uk, ulli.kroll@googlemail.com, linus.walleij@linaro.org, shawnguo@kernel.org, Sascha Hauer , kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com, tony@atomide.com, khilman@kernel.org, catalin.marinas@arm.com, will@kernel.org, guoren@kernel.org, bcain@quicinc.com, chenhuacai@kernel.org, kernel@xen0n.name, geert@linux-m68k.org, sammy@sammy.net, monstr@monstr.eu, tsbogend@alpha.franken.de, dinguyen@kernel.org, jonas@southpole.se, stefan.kristiansson@saunalahti.fi, shorne@gmail.com, James.Bottomley@HansenPartnership.com, deller@gmx.de, mpe@ellerman.id.au, npiggin@gmail.com, christophe.leroy@csgroup.eu, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, hca@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com, borntraeger@linux.ibm.com, svens@linux.ibm.com, ysato@users.sourceforge.jp, dalias@libc.org, davem@davemloft.net, richard@nod.at, anton.ivanov@cambridgegreys.com, johannes@sipsolutions.net, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, acme@kernel.org, mark.rutland@arm.com, alexander.shishkin@linux.intel.com, jolsa@kernel.org, namhyung@kernel.org, jgross@suse.com, srivatsa@csail.mit.edu, amakhalov@vmware.com, pv-drivers@vmware.com, boris.ostrovsky@oracle.com, chris@zankel.net, jcmvbkbc@gmail.com, rafael@kernel.org, lenb@kernel.org, pavel@ucw.cz, gregkh@linuxfoundation.org, mturquette@baylibre.com, sboyd@kernel.org, daniel.lezcano@linaro.org, lpieralisi@kernel.org, sudeep.holla@arm.com, agross@kernel.org, bjorn.andersson@linaro.org, konrad.dybcio@somainline.org, anup@brainfault.org, thierry.reding@gmail.com, jonathanh@nvidia.com, jacob.jun.pan@linux.intel.com, atishp@atishpatra.org, Arnd Bergmann , yury.norov@gmail.com, andriy.shevchenko@linux.intel.com, linux@rasmusvillemoes.dk, dennis@kernel.org, tj@kernel.org, cl@linux.com, rostedt@goodmis.org, pmladek@suse.com, senozhatsky@chromium.org, john.ogness@linutronix.de, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, bsegall@google.com, mgorman@suse.de, bristot@redhat.com, vschneid@redhat.com, fweisbec@gmail.com, ryabinin.a.a@gmail.com, glider@google.com, andreyknvl@gmail.com, dvyukov@google.com, vincenzo.frascino@arm.com, Andrew Morton , jpoimboe@kernel.org, linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-omap@vger.kernel.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, loongarch@lists.linux.dev, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, openrisc@lists.librecores.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-um@lists.infradead.org, linux-perf-users@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-xtensa@linux-xtensa.org, linux-acpi@vger.kernel.org, linux-pm@vger.kernel.org, linux-clk@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-tegra@vger.kernel.org, linux-arch@vger.kernel.org, kasan-dev@googlegroups.com Subject: Re: [PATCH v2 10/44] cpuidle,armada: Push RCU-idle into driver Message-ID: <20220919143907.GB61009@lothringen> References: <20220919095939.761690562@infradead.org> <20220919101521.004425686@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20220919101521.004425686@infradead.org> Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org On Mon, Sep 19, 2022 at 11:59:49AM +0200, Peter Zijlstra wrote: > Doing RCU-idle outside the driver, only to then temporarily enable it > again before going idle is daft. Ah wait, now I see, that's cpu_pm_enter()/cpu_pm_exit() -> cpu_pm_notify*() the culprits. Might be worth adding a short note about that on your changelogs. > > Signed-off-by: Peter Zijlstra (Intel) > --- > drivers/cpuidle/cpuidle-mvebu-v7.c | 7 +++++++ > 1 file changed, 7 insertions(+) > > --- a/drivers/cpuidle/cpuidle-mvebu-v7.c > +++ b/drivers/cpuidle/cpuidle-mvebu-v7.c > @@ -36,7 +36,10 @@ static int mvebu_v7_enter_idle(struct cp > if (drv->states[index].flags & MVEBU_V7_FLAG_DEEP_IDLE) > deepidle = true; > > + ct_idle_enter(); > ret = mvebu_v7_cpu_suspend(deepidle); > + ct_idle_exit(); And then yes of course: Reviewed-by: Frederic Weisbecker From mboxrd@z Thu Jan 1 00:00:00 1970 From: Frederic Weisbecker Date: Mon, 19 Sep 2022 14:39:07 +0000 Subject: Re: [PATCH v2 10/44] cpuidle,armada: Push RCU-idle into driver Message-Id: <20220919143907.GB61009@lothringen> List-Id: References: <20220919095939.761690562@infradead.org> <20220919101521.004425686@infradead.org> In-Reply-To: <20220919101521.004425686@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Peter Zijlstra Cc: richard.henderson@linaro.org, ink@jurassic.park.msu.ru, mattst88@gmail.com, vgupta@kernel.org, linux@armlinux.org.uk, ulli.kroll@googlemail.com, linus.walleij@linaro.org, shawnguo@kernel.org, Sascha Hauer , kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com, tony@atomide.com, khilman@kernel.org, catalin.marinas@arm.com, will@kernel.org, guoren@kernel.org, bcain@quicinc.com, chenhuacai@kernel.org, kernel@xen0n.name, geert@linux-m68k.org, sammy@sammy.net, monstr@monstr.eu, tsbogend@alpha.franken.de, dinguyen@kernel.org, jonas@southpole.se, stefan.kristiansson@saunalahti.fi, shorne@gmail.com, James.Bottomley@HansenPartnership.com, deller@gmx.de, mpe@ellerman.id.au, npiggin@gmail.com, christophe.leroy@csgroup.eu, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, hca@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com, borntraeger@linux.ibm.com, svens@linux.ibm.com, ysato@users.sourceforge.jp, dalias@libc.org, davem@davemloft.net, richard@nod.at, anton.ivanov@cambridgegreys.com, johannes@sipsolutions.net, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, acme@kernel.org, mark.rutland@arm.com, alexander.shishkin@linux.intel.com, jolsa@kernel.org, namhyung@kernel.org, jgross@suse.com, srivatsa@csail.mit.edu, amakhalov@vmware.com, pv-drivers@vmware.com, boris.ostrovsky@oracle.com, chris@zankel.net, jcmvbkbc@gmail.com, rafael@kernel.org, lenb@kernel.org, pavel@ucw.cz, gregkh@linuxfoundation.org, mturquette@baylibre.com, sboyd@kernel.org, daniel.lezcano@linaro.org, lpieralisi@kernel.org, sudeep.holla@arm.com, agross@kernel.org, bjorn.andersson@linaro.org, konrad.dybcio@somainline.org, anup@brainfault.org, thierry.reding@gmail.com, jonathanh@nvidia.com, jacob.jun.pan@linux.intel.com, atishp@atishpatra.org, Arnd Bergmann , yury.norov@gmail.com, andriy.shevchenko@linux.intel.com, linux@rasmusvillemoes.dk, dennis@kernel.org, tj@kernel.org, cl@linux.com, rostedt@goodmis.org, pmladek@suse.com, senozhatsky@chromium.org, john.ogness@linutronix.de, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, bsegall@google.com, mgorman@suse.de, bristot@redhat.com, vschneid@redhat.com, fweisbec@gmail.com, ryabinin.a.a@gmail.com, glider@google.com, andreyknvl@gmail.com, dvyukov@google.com, vincenzo.frascino@arm.com, Andrew Morton , jpoimboe@kernel.org, linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-omap@vger.kernel.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, loongarch@lists.linux.dev, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, openrisc@lists.librecores.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-um@lists.infradead.org, linux-perf-users@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-xtensa@linux-xtensa.org, linux-acpi@vger.kernel.org, linux-pm@vger.kernel.org, linux-clk@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-tegra@vger.kernel.org, linux-arch@vger.kernel.org, kasan-dev@googlegroups.com On Mon, Sep 19, 2022 at 11:59:49AM +0200, Peter Zijlstra wrote: > Doing RCU-idle outside the driver, only to then temporarily enable it > again before going idle is daft. Ah wait, now I see, that's cpu_pm_enter()/cpu_pm_exit() -> cpu_pm_notify*() the culprits. Might be worth adding a short note about that on your changelogs. > > Signed-off-by: Peter Zijlstra (Intel) > --- > drivers/cpuidle/cpuidle-mvebu-v7.c | 7 +++++++ > 1 file changed, 7 insertions(+) > > --- a/drivers/cpuidle/cpuidle-mvebu-v7.c > +++ b/drivers/cpuidle/cpuidle-mvebu-v7.c > @@ -36,7 +36,10 @@ static int mvebu_v7_enter_idle(struct cp > if (drv->states[index].flags & MVEBU_V7_FLAG_DEEP_IDLE) > deepidle = true; > > + ct_idle_enter(); > ret = mvebu_v7_cpu_suspend(deepidle); > + ct_idle_exit(); And then yes of course: Reviewed-by: Frederic Weisbecker From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 96E0EC54EE9 for ; Mon, 19 Sep 2022 15:17:02 +0000 (UTC) DKIM-Signature: v=1; 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Mon, 19 Sep 2022 14:39:14 +0000 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id BF856B81C95; Mon, 19 Sep 2022 14:39:11 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 64C85C433D6; Mon, 19 Sep 2022 14:39:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1663598350; bh=EYlJ8II0nMQUwIjH0JUADdeT52M2bVXh8wZ8I7YWDZQ=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=s3+f9C0KTVjmYUPiubcRMi8XIY5SJMP0244Vb1fXbwXdFHK2Bm2BwTTQiaCHZh9e8 gk+RkXTCbQvo+kjvjvWXHkL/k/NseZ0cbkyw2yDh2rZtKAxwlQOJfRciHvpbPx0lTm fDHS2etEOvPkeXqxMZO/oK5HOJhYIwkHmqYibhK+OB+2c+J+ST7lgkwPFAFcYkZbFW MXfD5dFjyN8rnPvB9qABtdA2rx/c5tMG/PNclmQth0MoJSBvpOxArLP6yCDHF7fpUw gdJXH8PHYrPCe2KnzR/yv4vNUQpksjg/NG4m1Xvw5PY6ek342QURnNGyGExrAr8OtZ QX22S+N/3elJw== Date: Mon, 19 Sep 2022 16:39:07 +0200 From: Frederic Weisbecker To: Peter Zijlstra Cc: richard.henderson@linaro.org, ink@jurassic.park.msu.ru, mattst88@gmail.com, vgupta@kernel.org, linux@armlinux.org.uk, ulli.kroll@googlemail.com, linus.walleij@linaro.org, shawnguo@kernel.org, Sascha Hauer , kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com, tony@atomide.com, khilman@kernel.org, catalin.marinas@arm.com, will@kernel.org, guoren@kernel.org, bcain@quicinc.com, chenhuacai@kernel.org, kernel@xen0n.name, geert@linux-m68k.org, sammy@sammy.net, monstr@monstr.eu, tsbogend@alpha.franken.de, dinguyen@kernel.org, jonas@southpole.se, stefan.kristiansson@saunalahti.fi, shorne@gmail.com, James.Bottomley@HansenPartnership.com, deller@gmx.de, mpe@ellerman.id.au, npiggin@gmail.com, christophe.leroy@csgroup.eu, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, hca@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com, borntraeger@linux.ibm.com, svens@linux.ibm.com, ysato@users.sourceforge.jp, dalias@libc.org, davem@davemloft.net, richard@nod.at, anton.ivanov@cambridgegreys.com, johannes@sipsolutions.net, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, acme@kernel.org, mark.rutland@arm.com, alexander.shishkin@linux.intel.com, jolsa@kernel.org, namhyung@kernel.org, jgross@suse.com, srivatsa@csail.mit.edu, amakhalov@vmware.com, pv-drivers@vmware.com, boris.ostrovsky@oracle.com, chris@zankel.net, jcmvbkbc@gmail.com, rafael@kernel.org, lenb@kernel.org, pavel@ucw.cz, gregkh@linuxfoundation.org, mturquette@baylibre.com, sboyd@kernel.org, daniel.lezcano@linaro.org, lpieralisi@kernel.org, sudeep.holla@arm.com, agross@kernel.org, bjorn.andersson@linaro.org, konrad.dybcio@somainline.org, anup@brainfault.org, thierry.reding@gmail.com, jonathanh@nvidia.com, jacob.jun.pan@linux.intel.com, atishp@atishpatra.org, Arnd Bergmann , yury.norov@gmail.com, andriy.shevchenko@linux.intel.com, linux@rasmusvillemoes.dk, dennis@kernel.org, tj@kernel.org, cl@linux.com, rostedt@goodmis.org, pmladek@suse.com, senozhatsky@chromium.org, john.ogness@linutronix.de, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, bsegall@google.com, mgorman@suse.de, bristot@redhat.com, vschneid@redhat.com, fweisbec@gmail.com, ryabinin.a.a@gmail.com, glider@google.com, andreyknvl@gmail.com, dvyukov@google.com, vincenzo.frascino@arm.com, Andrew Morton , jpoimboe@kernel.org, linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-omap@vger.kernel.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, loongarch@lists.linux.dev, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, openrisc@lists.librecores.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-um@lists.infradead.org, linux-perf-users@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-xtensa@linux-xtensa.org, linux-acpi@vger.kernel.org, linux-pm@vger.kernel.org, linux-clk@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-tegra@vger.kernel.org, linux-arch@vger.kernel.org, kasan-dev@googlegroups.com Subject: Re: [PATCH v2 10/44] cpuidle,armada: Push RCU-idle into driver Message-ID: <20220919143907.GB61009@lothringen> References: <20220919095939.761690562@infradead.org> <20220919101521.004425686@infradead.org> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20220919101521.004425686@infradead.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220919_073913_453028_FE7AFF44 X-CRM114-Status: GOOD ( 15.10 ) X-Mailman-Approved-At: Mon, 19 Sep 2022 08:09:28 -0700 X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org On Mon, Sep 19, 2022 at 11:59:49AM +0200, Peter Zijlstra wrote: > Doing RCU-idle outside the driver, only to then temporarily enable it > again before going idle is daft. Ah wait, now I see, that's cpu_pm_enter()/cpu_pm_exit() -> cpu_pm_notify*() the culprits. Might be worth adding a short note about that on your changelogs. > > Signed-off-by: Peter Zijlstra (Intel) > --- > drivers/cpuidle/cpuidle-mvebu-v7.c | 7 +++++++ > 1 file changed, 7 insertions(+) > > --- a/drivers/cpuidle/cpuidle-mvebu-v7.c > +++ b/drivers/cpuidle/cpuidle-mvebu-v7.c > @@ -36,7 +36,10 @@ static int mvebu_v7_enter_idle(struct cp > if (drv->states[index].flags & MVEBU_V7_FLAG_DEEP_IDLE) > deepidle = true; > > + ct_idle_enter(); > ret = mvebu_v7_cpu_suspend(deepidle); > + ct_idle_exit(); And then yes of course: Reviewed-by: Frederic Weisbecker _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher 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b=s3+f9C0KTVjmYUPiubcRMi8XIY5SJMP0244Vb1fXbwXdFHK2Bm2BwTTQiaCHZh9e8 gk+RkXTCbQvo+kjvjvWXHkL/k/NseZ0cbkyw2yDh2rZtKAxwlQOJfRciHvpbPx0lTm fDHS2etEOvPkeXqxMZO/oK5HOJhYIwkHmqYibhK+OB+2c+J+ST7lgkwPFAFcYkZbFW MXfD5dFjyN8rnPvB9qABtdA2rx/c5tMG/PNclmQth0MoJSBvpOxArLP6yCDHF7fpUw gdJXH8PHYrPCe2KnzR/yv4vNUQpksjg/NG4m1Xvw5PY6ek342QURnNGyGExrAr8OtZ QX22S+N/3elJw== Date: Mon, 19 Sep 2022 16:39:07 +0200 From: Frederic Weisbecker To: Peter Zijlstra Cc: richard.henderson@linaro.org, ink@jurassic.park.msu.ru, mattst88@gmail.com, vgupta@kernel.org, linux@armlinux.org.uk, ulli.kroll@googlemail.com, linus.walleij@linaro.org, shawnguo@kernel.org, Sascha Hauer , kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com, tony@atomide.com, khilman@kernel.org, catalin.marinas@arm.com, will@kernel.org, guoren@kernel.org, bcain@quicinc.com, chenhuacai@kernel.org, kernel@xen0n.name, geert@linux-m68k.org, sammy@sammy.net, monstr@monstr.eu, tsbogend@alpha.franken.de, dinguyen@kernel.org, jonas@southpole.se, 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daniel.lezcano@linaro.org, lpieralisi@kernel.org, sudeep.holla@arm.com, agross@kernel.org, bjorn.andersson@linaro.org, konrad.dybcio@somainline.org, anup@brainfault.org, thierry.reding@gmail.com, jonathanh@nvidia.com, jacob.jun.pan@linux.intel.com, atishp@atishpatra.org, Arnd Bergmann , yury.norov@gmail.com, andriy.shevchenko@linux.intel.com, linux@rasmusvillemoes.dk, dennis@kernel.org, tj@kernel.org, cl@linux.com, rostedt@goodmis.org, pmladek@suse.com, senozhatsky@chromium.org, john.ogness@linutronix.de, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, bsegall@google.com, mgorman@suse.de, bristot@redhat.com, vschneid@redhat.com, fweisbec@gmail.com, ryabinin.a.a@gmail.com, glider@google.com, andreyknvl@gmail.com, dvyukov@google.com, vincenzo.frascino@arm.com, Andrew Morton , jpoimboe@kernel.org, linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-omap@vger.kernel.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, loongarch@lists.linux.dev, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, openrisc@lists.librecores.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-um@lists.infradead.org, linux-perf-users@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-xtensa@linux-xtensa.org, linux-acpi@vger.kernel.org, linux-pm@vger.kernel.org, linux-clk@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-tegra@vger.kernel.org, linux-arch@vger.kernel.org, kasan-dev@googlegroups.com Subject: Re: [PATCH v2 10/44] cpuidle,armada: Push RCU-idle into driver Message-ID: <20220919143907.GB61009@lothringen> References: <20220919095939.761690562@infradead.org> <20220919101521.004425686@infradead.org> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20220919101521.004425686@infradead.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220919_073913_453028_FE7AFF44 X-CRM114-Status: GOOD ( 15.10 ) X-BeenThere: linux-snps-arc@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Linux on Synopsys ARC Processors List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-snps-arc" Errors-To: linux-snps-arc-bounces+linux-snps-arc=archiver.kernel.org@lists.infradead.org On Mon, Sep 19, 2022 at 11:59:49AM +0200, Peter Zijlstra wrote: > Doing RCU-idle outside the driver, only to then temporarily enable it > again before going idle is daft. Ah wait, now I see, that's cpu_pm_enter()/cpu_pm_exit() -> cpu_pm_notify*() the culprits. Might be worth adding a short note about that on your changelogs. > > Signed-off-by: Peter Zijlstra (Intel) > --- > drivers/cpuidle/cpuidle-mvebu-v7.c | 7 +++++++ > 1 file changed, 7 insertions(+) > > --- a/drivers/cpuidle/cpuidle-mvebu-v7.c > +++ b/drivers/cpuidle/cpuidle-mvebu-v7.c > @@ -36,7 +36,10 @@ static int mvebu_v7_enter_idle(struct cp > if (drv->states[index].flags & MVEBU_V7_FLAG_DEEP_IDLE) > deepidle = true; > > + ct_idle_enter(); > ret = mvebu_v7_cpu_suspend(deepidle); > + ct_idle_exit(); And then yes of course: Reviewed-by: Frederic Weisbecker _______________________________________________ linux-snps-arc mailing list linux-snps-arc@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-snps-arc From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.librecores.org (lists.librecores.org [88.198.125.70]) by smtp.lore.kernel.org (Postfix) with ESMTP id BE6A0C6FA90 for ; Mon, 19 Sep 2022 14:52:37 +0000 (UTC) Received: from [172.31.1.100] (localhost.localdomain [127.0.0.1]) by mail.librecores.org (Postfix) with ESMTP id 2505124B23; Mon, 19 Sep 2022 16:52:36 +0200 (CEST) Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by mail.librecores.org (Postfix) with ESMTPS id 6C52624B08 for ; Mon, 19 Sep 2022 16:39:12 +0200 (CEST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id BF856B81C95; Mon, 19 Sep 2022 14:39:11 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 64C85C433D6; Mon, 19 Sep 2022 14:39:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1663598350; bh=EYlJ8II0nMQUwIjH0JUADdeT52M2bVXh8wZ8I7YWDZQ=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=s3+f9C0KTVjmYUPiubcRMi8XIY5SJMP0244Vb1fXbwXdFHK2Bm2BwTTQiaCHZh9e8 gk+RkXTCbQvo+kjvjvWXHkL/k/NseZ0cbkyw2yDh2rZtKAxwlQOJfRciHvpbPx0lTm fDHS2etEOvPkeXqxMZO/oK5HOJhYIwkHmqYibhK+OB+2c+J+ST7lgkwPFAFcYkZbFW MXfD5dFjyN8rnPvB9qABtdA2rx/c5tMG/PNclmQth0MoJSBvpOxArLP6yCDHF7fpUw gdJXH8PHYrPCe2KnzR/yv4vNUQpksjg/NG4m1Xvw5PY6ek342QURnNGyGExrAr8OtZ QX22S+N/3elJw== Date: Mon, 19 Sep 2022 16:39:07 +0200 From: Frederic Weisbecker To: Peter Zijlstra Subject: Re: [PATCH v2 10/44] cpuidle,armada: Push RCU-idle into driver Message-ID: <20220919143907.GB61009@lothringen> References: <20220919095939.761690562@infradead.org> <20220919101521.004425686@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; 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Ah wait, now I see, that's cpu_pm_enter()/cpu_pm_exit() -> cpu_pm_notify*() the culprits. Might be worth adding a short note about that on your changelogs. > > Signed-off-by: Peter Zijlstra (Intel) > --- > drivers/cpuidle/cpuidle-mvebu-v7.c | 7 +++++++ > 1 file changed, 7 insertions(+) > > --- a/drivers/cpuidle/cpuidle-mvebu-v7.c > +++ b/drivers/cpuidle/cpuidle-mvebu-v7.c > @@ -36,7 +36,10 @@ static int mvebu_v7_enter_idle(struct cp > if (drv->states[index].flags & MVEBU_V7_FLAG_DEEP_IDLE) > deepidle = true; > > + ct_idle_enter(); > ret = mvebu_v7_cpu_suspend(deepidle); > + ct_idle_exit(); And then yes of course: Reviewed-by: Frederic Weisbecker From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id DD412ECAAA1 for ; Mon, 19 Sep 2022 22:30:20 +0000 (UTC) Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4MWfWb3KM0z3gFw for ; 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Mon, 19 Sep 2022 14:39:11 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 64C85C433D6; Mon, 19 Sep 2022 14:39:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1663598350; bh=EYlJ8II0nMQUwIjH0JUADdeT52M2bVXh8wZ8I7YWDZQ=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=s3+f9C0KTVjmYUPiubcRMi8XIY5SJMP0244Vb1fXbwXdFHK2Bm2BwTTQiaCHZh9e8 gk+RkXTCbQvo+kjvjvWXHkL/k/NseZ0cbkyw2yDh2rZtKAxwlQOJfRciHvpbPx0lTm fDHS2etEOvPkeXqxMZO/oK5HOJhYIwkHmqYibhK+OB+2c+J+ST7lgkwPFAFcYkZbFW MXfD5dFjyN8rnPvB9qABtdA2rx/c5tMG/PNclmQth0MoJSBvpOxArLP6yCDHF7fpUw gdJXH8PHYrPCe2KnzR/yv4vNUQpksjg/NG4m1Xvw5PY6ek342QURnNGyGExrAr8OtZ QX22S+N/3elJw== Date: Mon, 19 Sep 2022 16:39:07 +0200 From: Frederic Weisbecker To: Peter Zijlstra Subject: Re: [PATCH v2 10/44] cpuidle,armada: Push RCU-idle into driver Message-ID: <20220919143907.GB61009@lothringen> References: <20220919095939.761690562@infradead.org> <20220919101521.004425686@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; 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Ah wait, now I see, that's cpu_pm_enter()/cpu_pm_exit() -> cpu_pm_notify*() the culprits. Might be worth adding a short note about that on your changelogs. > > Signed-off-by: Peter Zijlstra (Intel) > --- > drivers/cpuidle/cpuidle-mvebu-v7.c | 7 +++++++ > 1 file changed, 7 insertions(+) > > --- a/drivers/cpuidle/cpuidle-mvebu-v7.c > +++ b/drivers/cpuidle/cpuidle-mvebu-v7.c > @@ -36,7 +36,10 @@ static int mvebu_v7_enter_idle(struct cp > if (drv->states[index].flags & MVEBU_V7_FLAG_DEEP_IDLE) > deepidle = true; > > + ct_idle_enter(); > ret = mvebu_v7_cpu_suspend(deepidle); > + ct_idle_exit(); And then yes of course: Reviewed-by: Frederic Weisbecker