From mboxrd@z Thu Jan 1 00:00:00 1970 From: Frederic Weisbecker Subject: Re: [PATCH v2 03/44] cpuidle/poll: Ensure IRQ state is invariant Date: Tue, 20 Sep 2022 12:43:25 +0200 Message-ID: <20220920104325.GA72346@lothringen> References: <20220919095939.761690562@infradead.org> <20220919101520.534233547@infradead.org> <20220919131927.GA58444@lothringen> Mime-Version: 1.0 Return-path: DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1663670608; bh=6GsQ3yhKLr/MxdSlXebBHOnZZwkqV+Km5n+FdtLELFs=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=B5dAVjAuYVAf/ldcpMwVOIccr93eh+i/PPqe86bcTTpe9rquyYiwNXWsEYN6MEgtC 4dkSGP8Y6MjqZepb+9gQ6s3zfFi8AQZlWHaT9YE94OBgT652ETiHQ4+oyg1H9cMKe0 W4ejHxERjCdEHRyFhCMtozUTXVDZIa2H0g10CJTUgcjhZqBq48hlTCa71o1rmNMJUn UuRNJ769Ea2tTmdOKpPB1SWcTi7Afm+dzY4ofsUzOPWyR3eaWqkGsJ5+yZC/8xtTFB fdtVAvZE4UfiE+hEXckkBlXeuH+b1N2KqaqSOzsoRx2yLdTrKi9779585hh4U8ohjY b1TN7NMPsPyxQ== Content-Disposition: inline In-Reply-To: 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 Tue, Sep 20, 2022 at 10:57:00AM +0200, Peter Zijlstra wrote: > On Mon, Sep 19, 2022 at 03:19:27PM +0200, Frederic Weisbecker wrote: > > On Mon, Sep 19, 2022 at 11:59:42AM +0200, Peter Zijlstra wrote: > > > cpuidle_state::enter() methods should be IRQ invariant > > > > Got a bit confused with the invariant thing since the first chunck I > > see in this patch is a conversion to an non-traceable local_irq_enable(). > > > > Maybe just add a short mention about that and why? > > Changelog now reads: > > --- > Subject: cpuidle/poll: Ensure IRQ state is invariant > From: Peter Zijlstra > Date: Tue May 31 15:43:32 CEST 2022 > > cpuidle_state::enter() methods should be IRQ invariant. > > Additionally make sure to use raw_local_irq_*() methods since this > cpuidle callback will be called with RCU already disabled. > > Signed-off-by: Peter Zijlstra (Intel) > Reviewed-by: Rafael J. Wysocki Reviewed-by: Frederic Weisbecker Thanks! 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Tue, 20 Sep 2022 10:43:29 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5A744C433C1; Tue, 20 Sep 2022 10:43:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1663670608; bh=6GsQ3yhKLr/MxdSlXebBHOnZZwkqV+Km5n+FdtLELFs=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=B5dAVjAuYVAf/ldcpMwVOIccr93eh+i/PPqe86bcTTpe9rquyYiwNXWsEYN6MEgtC 4dkSGP8Y6MjqZepb+9gQ6s3zfFi8AQZlWHaT9YE94OBgT652ETiHQ4+oyg1H9cMKe0 W4ejHxERjCdEHRyFhCMtozUTXVDZIa2H0g10CJTUgcjhZqBq48hlTCa71o1rmNMJUn UuRNJ769Ea2tTmdOKpPB1SWcTi7Afm+dzY4ofsUzOPWyR3eaWqkGsJ5+yZC/8xtTFB fdtVAvZE4UfiE+hEXckkBlXeuH+b1N2KqaqSOzsoRx2yLdTrKi9779585hh4U8ohjY b1TN7NMPsPyxQ== Date: Tue, 20 Sep 2022 12:43:25 +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, "Rafael J. Wysocki" Subject: Re: [PATCH v2 03/44] cpuidle/poll: Ensure IRQ state is invariant Message-ID: <20220920104325.GA72346@lothringen> References: <20220919095939.761690562@infradead.org> <20220919101520.534233547@infradead.org> <20220919131927.GA58444@lothringen> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org On Tue, Sep 20, 2022 at 10:57:00AM +0200, Peter Zijlstra wrote: > On Mon, Sep 19, 2022 at 03:19:27PM +0200, Frederic Weisbecker wrote: > > On Mon, Sep 19, 2022 at 11:59:42AM +0200, Peter Zijlstra wrote: > > > cpuidle_state::enter() methods should be IRQ invariant > > > > Got a bit confused with the invariant thing since the first chunck I > > see in this patch is a conversion to an non-traceable local_irq_enable(). > > > > Maybe just add a short mention about that and why? > > Changelog now reads: > > --- > Subject: cpuidle/poll: Ensure IRQ state is invariant > From: Peter Zijlstra > Date: Tue May 31 15:43:32 CEST 2022 > > cpuidle_state::enter() methods should be IRQ invariant. > > Additionally make sure to use raw_local_irq_*() methods since this > cpuidle callback will be called with RCU already disabled. > > Signed-off-by: Peter Zijlstra (Intel) > Reviewed-by: Rafael J. Wysocki Reviewed-by: Frederic Weisbecker Thanks! From mboxrd@z Thu Jan 1 00:00:00 1970 From: Frederic Weisbecker Date: Tue, 20 Sep 2022 10:43:25 +0000 Subject: Re: [PATCH v2 03/44] cpuidle/poll: Ensure IRQ state is invariant Message-Id: <20220920104325.GA72346@lothringen> List-Id: References: <20220919095939.761690562@infradead.org> <20220919101520.534233547@infradead.org> <20220919131927.GA58444@lothringen> In-Reply-To: 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, "Rafael J. Wysocki" On Tue, Sep 20, 2022 at 10:57:00AM +0200, Peter Zijlstra wrote: > On Mon, Sep 19, 2022 at 03:19:27PM +0200, Frederic Weisbecker wrote: > > On Mon, Sep 19, 2022 at 11:59:42AM +0200, Peter Zijlstra wrote: > > > cpuidle_state::enter() methods should be IRQ invariant > > > > Got a bit confused with the invariant thing since the first chunck I > > see in this patch is a conversion to an non-traceable local_irq_enable(). > > > > Maybe just add a short mention about that and why? > > Changelog now reads: > > --- > Subject: cpuidle/poll: Ensure IRQ state is invariant > From: Peter Zijlstra > Date: Tue May 31 15:43:32 CEST 2022 > > cpuidle_state::enter() methods should be IRQ invariant. > > Additionally make sure to use raw_local_irq_*() methods since this > cpuidle callback will be called with RCU already disabled. > > Signed-off-by: Peter Zijlstra (Intel) > Reviewed-by: Rafael J. Wysocki Reviewed-by: Frederic Weisbecker Thanks! 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Wysocki" Subject: Re: [PATCH v2 03/44] cpuidle/poll: Ensure IRQ state is invariant Message-ID: <20220920104325.GA72346@lothringen> References: <20220919095939.761690562@infradead.org> <20220919101520.534233547@infradead.org> <20220919131927.GA58444@lothringen> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220920_034329_749097_2EE4DBCF X-CRM114-Status: GOOD ( 17.82 ) X-Mailman-Approved-At: Tue, 20 Sep 2022 07:11:01 -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 Tue, Sep 20, 2022 at 10:57:00AM +0200, Peter Zijlstra wrote: > On Mon, Sep 19, 2022 at 03:19:27PM +0200, Frederic Weisbecker wrote: > > On Mon, Sep 19, 2022 at 11:59:42AM +0200, Peter Zijlstra wrote: > > > cpuidle_state::enter() methods should be IRQ invariant > > > > Got a bit confused with the invariant thing since the first chunck I > > see in this patch is a conversion to an non-traceable local_irq_enable(). > > > > Maybe just add a short mention about that and why? > > Changelog now reads: > > --- > Subject: cpuidle/poll: Ensure IRQ state is invariant > From: Peter Zijlstra > Date: Tue May 31 15:43:32 CEST 2022 > > cpuidle_state::enter() methods should be IRQ invariant. > > Additionally make sure to use raw_local_irq_*() methods since this > cpuidle callback will be called with RCU already disabled. > > Signed-off-by: Peter Zijlstra (Intel) > Reviewed-by: Rafael J. Wysocki Reviewed-by: Frederic Weisbecker Thanks! _______________________________________________ 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 ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id C7498C54EE9 for ; Tue, 20 Sep 2022 10:43:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; 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Tue, 20 Sep 2022 10:43:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1663670608; bh=6GsQ3yhKLr/MxdSlXebBHOnZZwkqV+Km5n+FdtLELFs=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=B5dAVjAuYVAf/ldcpMwVOIccr93eh+i/PPqe86bcTTpe9rquyYiwNXWsEYN6MEgtC 4dkSGP8Y6MjqZepb+9gQ6s3zfFi8AQZlWHaT9YE94OBgT652ETiHQ4+oyg1H9cMKe0 W4ejHxERjCdEHRyFhCMtozUTXVDZIa2H0g10CJTUgcjhZqBq48hlTCa71o1rmNMJUn UuRNJ769Ea2tTmdOKpPB1SWcTi7Afm+dzY4ofsUzOPWyR3eaWqkGsJ5+yZC/8xtTFB fdtVAvZE4UfiE+hEXckkBlXeuH+b1N2KqaqSOzsoRx2yLdTrKi9779585hh4U8ohjY b1TN7NMPsPyxQ== Date: Tue, 20 Sep 2022 12:43:25 +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, "Rafael J. Wysocki" Subject: Re: [PATCH v2 03/44] cpuidle/poll: Ensure IRQ state is invariant Message-ID: <20220920104325.GA72346@lothringen> References: <20220919095939.761690562@infradead.org> <20220919101520.534233547@infradead.org> <20220919131927.GA58444@lothringen> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220920_034329_749097_2EE4DBCF X-CRM114-Status: GOOD ( 17.82 ) 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 Tue, Sep 20, 2022 at 10:57:00AM +0200, Peter Zijlstra wrote: > On Mon, Sep 19, 2022 at 03:19:27PM +0200, Frederic Weisbecker wrote: > > On Mon, Sep 19, 2022 at 11:59:42AM +0200, Peter Zijlstra wrote: > > > cpuidle_state::enter() methods should be IRQ invariant > > > > Got a bit confused with the invariant thing since the first chunck I > > see in this patch is a conversion to an non-traceable local_irq_enable(). > > > > Maybe just add a short mention about that and why? > > Changelog now reads: > > --- > Subject: cpuidle/poll: Ensure IRQ state is invariant > From: Peter Zijlstra > Date: Tue May 31 15:43:32 CEST 2022 > > cpuidle_state::enter() methods should be IRQ invariant. > > Additionally make sure to use raw_local_irq_*() methods since this > cpuidle callback will be called with RCU already disabled. > > Signed-off-by: Peter Zijlstra (Intel) > Reviewed-by: Rafael J. Wysocki Reviewed-by: Frederic Weisbecker Thanks! _______________________________________________ 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 9552EC6FA94 for ; Tue, 20 Sep 2022 17:19:23 +0000 (UTC) Received: from [172.31.1.100] (localhost.localdomain [127.0.0.1]) by mail.librecores.org (Postfix) with ESMTP id 55FA3249BB; Tue, 20 Sep 2022 19:19:22 +0200 (CEST) Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by mail.librecores.org (Postfix) with ESMTPS id 489C024814 for ; Tue, 20 Sep 2022 12:43:30 +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 dfw.source.kernel.org (Postfix) with ESMTPS id 0BBD662224; Tue, 20 Sep 2022 10:43:29 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5A744C433C1; Tue, 20 Sep 2022 10:43:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1663670608; bh=6GsQ3yhKLr/MxdSlXebBHOnZZwkqV+Km5n+FdtLELFs=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=B5dAVjAuYVAf/ldcpMwVOIccr93eh+i/PPqe86bcTTpe9rquyYiwNXWsEYN6MEgtC 4dkSGP8Y6MjqZepb+9gQ6s3zfFi8AQZlWHaT9YE94OBgT652ETiHQ4+oyg1H9cMKe0 W4ejHxERjCdEHRyFhCMtozUTXVDZIa2H0g10CJTUgcjhZqBq48hlTCa71o1rmNMJUn UuRNJ769Ea2tTmdOKpPB1SWcTi7Afm+dzY4ofsUzOPWyR3eaWqkGsJ5+yZC/8xtTFB fdtVAvZE4UfiE+hEXckkBlXeuH+b1N2KqaqSOzsoRx2yLdTrKi9779585hh4U8ohjY b1TN7NMPsPyxQ== Date: Tue, 20 Sep 2022 12:43:25 +0200 From: Frederic Weisbecker To: Peter Zijlstra Subject: Re: [PATCH v2 03/44] cpuidle/poll: Ensure IRQ state is invariant Message-ID: <20220920104325.GA72346@lothringen> References: <20220919095939.761690562@infradead.org> <20220919101520.534233547@infradead.org> <20220919131927.GA58444@lothringen> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Mailman-Approved-At: Tue, 20 Sep 2022 19:19:18 +0200 X-BeenThere: openrisc@lists.librecores.org X-Mailman-Version: 2.1.26 Precedence: list List-Id: Discussion around the OpenRISC processor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: juri.lelli@redhat.com, "Rafael J. Wysocki" , rafael@kernel.org, catalin.marinas@arm.com, linus.walleij@linaro.org, bsegall@google.com, guoren@kernel.org, pavel@ucw.cz, agordeev@linux.ibm.com, srivatsa@csail.mit.edu, linux-arch@vger.kernel.org, vincent.guittot@linaro.org, mpe@ellerman.id.au, chenhuacai@kernel.org, christophe.leroy@csgroup.eu, linux-acpi@vger.kernel.org, agross@kernel.org, linux-imx@nxp.com, vgupta@kernel.org, mattst88@gmail.com, borntraeger@linux.ibm.com, mturquette@baylibre.com, sammy@sammy.net, pmladek@suse.com, linux-pm@vger.kernel.org, Sascha Hauer , linux-um@lists.infradead.org, npiggin@gmail.com, tglx@linutronix.de, linux-omap@vger.kernel.org, dietmar.eggemann@arm.com, andreyknvl@gmail.com, gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, senozhatsky@chromium.org, svens@linux.ibm.com, jolsa@kernel.org, tj@kernel.org, Andrew Morton , mark.rutland@arm.com, linux-ia64@vger.kernel.org, dave.hansen@linux.intel.com, virtualization@lists.linux-foundation.org, James.Bottomley@hansenpartnership.com, jcmvbkbc@gmail.com, thierry.reding@gmail.com, kernel@xen0n.name, cl@linux.com, linux-s390@vger.kernel.org, vschneid@redhat.com, john.ogness@linutronix.de, ysato@users.sourceforge.jp, linux-sh@vger.kernel.org, festevam@gmail.com, deller@gmx.de, daniel.lezcano@linaro.org, jonathanh@nvidia.com, dennis@kernel.org, lenb@kernel.org, linux-xtensa@linux-xtensa.org, kernel@pengutronix.de, gor@linux.ibm.com, linux-arm-msm@vger.kernel.org, linux-alpha@vger.kernel.org, linux-m68k@lists.linux-m68k.org, loongarch@lists.linux.dev, chris@zankel.net, sboyd@kernel.org, dinguyen@kernel.org, bristot@redhat.com, alexander.shishkin@linux.intel.com, fweisbec@gmail.com, lpieralisi@kernel.org, atishp@atishpatra.org, linux@rasmusvillemoes.dk, kasan-dev@googlegroups.com, will@kernel.org, boris.ostrovsky@oracle.com, khilman@kernel.org, linux-csky@vger.kernel.org, pv-drivers@vmware.com, linux-snps-arc@lists.infradead.org, mgorman@suse.de, jacob.jun.pan@linux.intel.com, Arnd Bergmann , ulli.kroll@googlemail.com, linux-clk@vger.kernel.org, rostedt@goodmis.org, ink@jurassic.park.msu.ru, bcain@quicinc.com, tsbogend@alpha.franken.de, linux-parisc@vger.kernel.org, ryabinin.a.a@gmail.com, sudeep.holla@arm.com, shawnguo@kernel.org, davem@davemloft.net, dalias@libc.org, tony@atomide.com, amakhalov@vmware.com, konrad.dybcio@somainline.org, bjorn.andersson@linaro.org, glider@google.com, hpa@zytor.com, sparclinux@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-riscv@lists.infradead.org, vincenzo.frascino@arm.com, anton.ivanov@cambridgegreys.com, jonas@southpole.se, yury.norov@gmail.com, richard@nod.at, x86@kernel.org, linux@armlinux.org.uk, mingo@redhat.com, aou@eecs.berkeley.edu, hca@linux.ibm.com, richard.henderson@linaro.org, openrisc@lists.librecores.org, acme@kernel.org, paul.walmsley@sifive.com, linux-tegra@vger.kernel.org, namhyung@kernel.org, andriy.shevchenko@linux.intel.com, jpoimboe@kernel.org, dvyukov@google.com, jgross@suse.com, monstr@monstr.eu, linux-mips@vger.kernel.org, palmer@dabbelt.com, anup@brainfault.org, bp@alien8.de, johannes@sipsolutions.net, linuxppc-dev@lists.ozlabs.org Errors-To: openrisc-bounces@lists.librecores.org Sender: "OpenRISC" On Tue, Sep 20, 2022 at 10:57:00AM +0200, Peter Zijlstra wrote: > On Mon, Sep 19, 2022 at 03:19:27PM +0200, Frederic Weisbecker wrote: > > On Mon, Sep 19, 2022 at 11:59:42AM +0200, Peter Zijlstra wrote: > > > cpuidle_state::enter() methods should be IRQ invariant > > > > Got a bit confused with the invariant thing since the first chunck I > > see in this patch is a conversion to an non-traceable local_irq_enable(). > > > > Maybe just add a short mention about that and why? > > Changelog now reads: > > --- > Subject: cpuidle/poll: Ensure IRQ state is invariant > From: Peter Zijlstra > Date: Tue May 31 15:43:32 CEST 2022 > > cpuidle_state::enter() methods should be IRQ invariant. > > Additionally make sure to use raw_local_irq_*() methods since this > cpuidle callback will be called with RCU already disabled. > > Signed-off-by: Peter Zijlstra (Intel) > Reviewed-by: Rafael J. Wysocki Reviewed-by: Frederic Weisbecker Thanks! 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 6C5A8C54EE9 for ; Tue, 20 Sep 2022 11:28:47 +0000 (UTC) Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4MWznp00yWz3cdX for ; Tue, 20 Sep 2022 21:28:46 +1000 (AEST) Authentication-Results: lists.ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20201202 header.b=B5dAVjAu; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=kernel.org (client-ip=139.178.84.217; helo=dfw.source.kernel.org; envelope-from=frederic@kernel.org; receiver=) Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20201202 header.b=B5dAVjAu; dkim-atps=neutral Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4MWync11p8z2yRV for ; Tue, 20 Sep 2022 20:43:31 +1000 (AEST) 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 dfw.source.kernel.org (Postfix) with ESMTPS id 0BBD662224; Tue, 20 Sep 2022 10:43:29 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5A744C433C1; Tue, 20 Sep 2022 10:43:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1663670608; bh=6GsQ3yhKLr/MxdSlXebBHOnZZwkqV+Km5n+FdtLELFs=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=B5dAVjAuYVAf/ldcpMwVOIccr93eh+i/PPqe86bcTTpe9rquyYiwNXWsEYN6MEgtC 4dkSGP8Y6MjqZepb+9gQ6s3zfFi8AQZlWHaT9YE94OBgT652ETiHQ4+oyg1H9cMKe0 W4ejHxERjCdEHRyFhCMtozUTXVDZIa2H0g10CJTUgcjhZqBq48hlTCa71o1rmNMJUn UuRNJ769Ea2tTmdOKpPB1SWcTi7Afm+dzY4ofsUzOPWyR3eaWqkGsJ5+yZC/8xtTFB fdtVAvZE4UfiE+hEXckkBlXeuH+b1N2KqaqSOzsoRx2yLdTrKi9779585hh4U8ohjY b1TN7NMPsPyxQ== Date: Tue, 20 Sep 2022 12:43:25 +0200 From: Frederic Weisbecker To: Peter Zijlstra Subject: Re: [PATCH v2 03/44] cpuidle/poll: Ensure IRQ state is invariant Message-ID: <20220920104325.GA72346@lothringen> References: <20220919095939.761690562@infradead.org> <20220919101520.534233547@infradead.org> <20220919131927.GA58444@lothringen> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Mailman-Approved-At: Tue, 20 Sep 2022 21:24:41 +1000 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: juri.lelli@redhat.com, "Rafael J. Wysocki" , rafael@kernel.org, catalin.marinas@arm.com, linus.walleij@linaro.org, bsegall@google.com, guoren@kernel.org, pavel@ucw.cz, agordeev@linux.ibm.com, srivatsa@csail.mit.edu, linux-arch@vger.kernel.org, vincent.guittot@linaro.org, chenhuacai@kernel.org, linux-acpi@vger.kernel.org, agross@kernel.org, geert@linux-m68k.org, linux-imx@nxp.com, vgupta@kernel.org, mattst88@gmail.com, borntraeger@linux.ibm.com, mturquette@baylibre.com, sammy@sammy.net, pmladek@suse.com, linux-pm@vger.kernel.org, Sascha Hauer , linux-um@lists.infradead.org, npiggin@gmail.com, tglx@linutronix.de, linux-omap@vger.kernel.org, dietmar.eggemann@arm.com, andreyknvl@gmail.com, gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, senozhatsky@chromium.org, svens@linux.ibm.com, jolsa@kernel.org, tj@kernel.org, Andrew Morton , mark.rutland@arm.com, linux-ia64 @vger.kernel.org, dave.hansen@linux.intel.com, virtualization@lists.linux-foundation.org, James.Bottomley@hansenpartnership.com, jcmvbkbc@gmail.com, thierry.reding@gmail.com, kernel@xen0n.name, cl@linux.com, linux-s390@vger.kernel.org, vschneid@redhat.com, john.ogness@linutronix.de, ysato@users.sourceforge.jp, linux-sh@vger.kernel.org, festevam@gmail.com, deller@gmx.de, daniel.lezcano@linaro.org, jonathanh@nvidia.com, dennis@kernel.org, lenb@kernel.org, linux-xtensa@linux-xtensa.org, kernel@pengutronix.de, gor@linux.ibm.com, linux-arm-msm@vger.kernel.org, linux-alpha@vger.kernel.org, linux-m68k@lists.linux-m68k.org, loongarch@lists.linux.dev, shorne@gmail.com, chris@zankel.net, sboyd@kernel.org, dinguyen@kernel.org, bristot@redhat.com, alexander.shishkin@linux.intel.com, fweisbec@gmail.com, lpieralisi@kernel.org, atishp@atishpatra.org, linux@rasmusvillemoes.dk, kasan-dev@googlegroups.com, will@kernel.org, boris.ostrovsky@oracle.com, khilman@kernel.org, linux-csky@vger.kernel.org, pv -drivers@vmware.com, linux-snps-arc@lists.infradead.org, mgorman@suse.de, jacob.jun.pan@linux.intel.com, Arnd Bergmann , ulli.kroll@googlemail.com, linux-clk@vger.kernel.org, rostedt@goodmis.org, ink@jurassic.park.msu.ru, bcain@quicinc.com, tsbogend@alpha.franken.de, linux-parisc@vger.kernel.org, ryabinin.a.a@gmail.com, sudeep.holla@arm.com, shawnguo@kernel.org, davem@davemloft.net, dalias@libc.org, tony@atomide.com, amakhalov@vmware.com, konrad.dybcio@somainline.org, bjorn.andersson@linaro.org, glider@google.com, hpa@zytor.com, sparclinux@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-riscv@lists.infradead.org, vincenzo.frascino@arm.com, anton.ivanov@cambridgegreys.com, jonas@southpole.se, yury.norov@gmail.com, richard@nod.at, x86@kernel.org, linux@armlinux.org.uk, mingo@redhat.com, aou@eecs.berkeley.edu, hca@linux.ibm.com, richard.henderson@linaro.org, stefan.kristiansson@saunalahti.fi, openrisc@lists.librecores.org, acme@kernel.org, paul.walmsley@sifive.com, linux-tegra@vger.kernel.org, namhyung@kernel.org, andriy.shevchenko@linux.intel.com, jpoimboe@kernel.org, dvyukov@google.com, jgross@suse.com, monstr@monstr.eu, linux-mips@vger.kernel.org, palmer@dabbelt.com, anup@brainfault.org, bp@alien8.de, johannes@sipsolutions.net, linuxppc-dev@lists.ozlabs.org Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" On Tue, Sep 20, 2022 at 10:57:00AM +0200, Peter Zijlstra wrote: > On Mon, Sep 19, 2022 at 03:19:27PM +0200, Frederic Weisbecker wrote: > > On Mon, Sep 19, 2022 at 11:59:42AM +0200, Peter Zijlstra wrote: > > > cpuidle_state::enter() methods should be IRQ invariant > > > > Got a bit confused with the invariant thing since the first chunck I > > see in this patch is a conversion to an non-traceable local_irq_enable(). > > > > Maybe just add a short mention about that and why? > > Changelog now reads: > > --- > Subject: cpuidle/poll: Ensure IRQ state is invariant > From: Peter Zijlstra > Date: Tue May 31 15:43:32 CEST 2022 > > cpuidle_state::enter() methods should be IRQ invariant. > > Additionally make sure to use raw_local_irq_*() methods since this > cpuidle callback will be called with RCU already disabled. > > Signed-off-by: Peter Zijlstra (Intel) > Reviewed-by: Rafael J. Wysocki Reviewed-by: Frederic Weisbecker Thanks!