From mboxrd@z Thu Jan 1 00:00:00 1970 From: Viresh Kumar Subject: Re: [Query] Preemption (hogging) of the work handler Date: Thu, 14 Jul 2016 15:14:37 -0700 Message-ID: <20160714221437.GF3057@ubuntu> References: <20160701165959.GR12473@ubuntu> <163184622.ctfAvoN0Mo@vostro.rjw.lan> <20160714143939.GF13151@quack2.suse.cz> <56498260.j02nbY6ACm@vostro.rjw.lan> <20160714145554.GG13151@quack2.suse.cz> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from mail-pf0-f182.google.com ([209.85.192.182]:35278 "EHLO mail-pf0-f182.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751540AbcGNWOo (ORCPT ); Thu, 14 Jul 2016 18:14:44 -0400 Received: by mail-pf0-f182.google.com with SMTP id c2so34275662pfa.2 for ; Thu, 14 Jul 2016 15:14:44 -0700 (PDT) Content-Disposition: inline In-Reply-To: <20160714145554.GG13151@quack2.suse.cz> Sender: linux-pm-owner@vger.kernel.org List-Id: linux-pm@vger.kernel.org To: Jan Kara Cc: "Rafael J. Wysocki" , Sergey Senozhatsky , Sergey Senozhatsky , Tejun Heo , Greg Kroah-Hartman , Linux Kernel Mailing List , vlevenetz@mm-sol.com, vaibhav.hiremath@linaro.org, alex.elder@linaro.org, johan@kernel.org, akpm@linux-foundation.org, rostedt@goodmis.org, linux-pm@vger.kernel.org, Petr Mladek , Thomas Gleixner On 14-07-16, 16:55, Jan Kara wrote: > Agree on that - but that seems to be a problem of a particular wakeup > implementation of the 3.10 kernel Viresh is using, not a problem of the > upstream kernel. I think we can get it to trigger on mainline as well. Also to mention that I also don't see it on every suspend. Probably hrtimer_active() call returns true in the sequence somewhere earlier, and we don't have to go activate a hrtimer. -- viresh