From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tomasz Figa Subject: Re: exynos4: cpu hotplug + cpuidle/AFTR broken Date: Tue, 01 Apr 2014 14:29:28 +0200 Message-ID: <533AB128.7050208@samsung.com> References: <533A9849.1080402@linaro.org> <533AA17A.1090405@samsung.com> <533AAE34.20601@linaro.org> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from mailout3.w1.samsung.com ([210.118.77.13]:61824 "EHLO mailout3.w1.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751096AbaDAM3g (ORCPT ); Tue, 1 Apr 2014 08:29:36 -0400 Received: from eucpsbgm2.samsung.com (unknown [203.254.199.245]) by mailout3.w1.samsung.com (Oracle Communications Messaging Server 7u4-24.01(7.0.4.24.0) 64bit (built Nov 17 2011)) with ESMTP id <0N3C005RKQPAQE60@mailout3.w1.samsung.com> for linux-samsung-soc@vger.kernel.org; Tue, 01 Apr 2014 13:29:34 +0100 (BST) In-reply-to: <533AAE34.20601@linaro.org> Sender: linux-samsung-soc-owner@vger.kernel.org List-Id: linux-samsung-soc@vger.kernel.org To: Daniel Lezcano , linux-samsung-soc@vger.kernel.org, "linux-arm-kernel@lists.infradead.org" , Kukjin Kim On 01.04.2014 14:16, Daniel Lezcano wrote: > On 04/01/2014 01:22 PM, Tomasz Figa wrote: >> Hi Daniel, >> >> On 01.04.2014 12:43, Daniel Lezcano wrote: >>> >>> Hi all, >>> >>> I tried the v3.14 kernel and unplugged the cpu1. That leads to a kernel >>> hang without any trace. >>> >>> If I disable the cpuidle AFTR state through sysfs before unplugging >>> cpu1, it works well. >>> >>> I reproduced the issue on v3.14, v3.13, v3.12, v3.11 >>> >>> v3.10 works fine. >> >> Could you try to reproduce the same issue on linux-next? Some of PM >> issues on Exynos should be patches there. > > Tested on linux-next. Works fine. Great, thanks. > > Do you have an idea of the patch which have fixed the issue ? In order > to backport it the kernels mentioned above. Most likely it's this one: 61557b8bac ARM: EXYNOS: Do not resume l2x0 if not enabled before suspend Best regards, Tomasz From mboxrd@z Thu Jan 1 00:00:00 1970 From: t.figa@samsung.com (Tomasz Figa) Date: Tue, 01 Apr 2014 14:29:28 +0200 Subject: exynos4: cpu hotplug + cpuidle/AFTR broken In-Reply-To: <533AAE34.20601@linaro.org> References: <533A9849.1080402@linaro.org> <533AA17A.1090405@samsung.com> <533AAE34.20601@linaro.org> Message-ID: <533AB128.7050208@samsung.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On 01.04.2014 14:16, Daniel Lezcano wrote: > On 04/01/2014 01:22 PM, Tomasz Figa wrote: >> Hi Daniel, >> >> On 01.04.2014 12:43, Daniel Lezcano wrote: >>> >>> Hi all, >>> >>> I tried the v3.14 kernel and unplugged the cpu1. That leads to a kernel >>> hang without any trace. >>> >>> If I disable the cpuidle AFTR state through sysfs before unplugging >>> cpu1, it works well. >>> >>> I reproduced the issue on v3.14, v3.13, v3.12, v3.11 >>> >>> v3.10 works fine. >> >> Could you try to reproduce the same issue on linux-next? Some of PM >> issues on Exynos should be patches there. > > Tested on linux-next. Works fine. Great, thanks. > > Do you have an idea of the patch which have fixed the issue ? In order > to backport it the kernels mentioned above. Most likely it's this one: 61557b8bac ARM: EXYNOS: Do not resume l2x0 if not enabled before suspend Best regards, Tomasz