From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754860AbcEELph (ORCPT ); Thu, 5 May 2016 07:45:37 -0400 Received: from mail-lf0-f66.google.com ([209.85.215.66]:33962 "EHLO mail-lf0-f66.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751270AbcEELpf (ORCPT ); Thu, 5 May 2016 07:45:35 -0400 Subject: Re: [PATCH] soc/tegra: pmc: Fix "scheduling while atomic" To: Stephen Warren , Thierry Reding , Alexandre Courbot , Peter De Schrijver , Prashant Gaikwad References: <1460900051-3065-1-git-send-email-digetx@gmail.com> Cc: linux-clk@vger.kernel.org, linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org From: Dmitry Osipenko Message-ID: <69a8cb7c-0821-a6d2-607b-7d9a0ac057d2@gmail.com> Date: Thu, 5 May 2016 14:45:31 +0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.0 MIME-Version: 1.0 In-Reply-To: <1460900051-3065-1-git-send-email-digetx@gmail.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org I forgot to mention that this is observed on 3.18 android kernel fork under a quite specific condition: EMC scaling enabled and set to the lowest freq, CPU max freq reduced. This may cause higher latency on CPU idle enter/exit. I couldn't reproduce this issue with the upstream kernel, guess some specific workload is also required. Any comments? =) -- Dmitry