From mboxrd@z Thu Jan 1 00:00:00 1970 From: Kashyap Chamarthy Subject: Re: intel_pstate divide error with v3.13-rc4-256-gb7000ad Date: Sun, 29 Dec 2013 13:12:18 +0100 Message-ID: <52C011A2.3040800@redhat.com> References: <20131227170147.GH10961@minantech.com> <52BDB63B.70107@redhat.com> <231382870.yshsPRR4KM@vostro.rjw.lan> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: Received: from mx1.redhat.com ([209.132.183.28]:6040 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751775Ab3L2MMh (ORCPT ); Sun, 29 Dec 2013 07:12:37 -0500 In-Reply-To: <231382870.yshsPRR4KM@vostro.rjw.lan> Sender: linux-pm-owner@vger.kernel.org List-Id: linux-pm@vger.kernel.org To: "Rafael J. Wysocki" Cc: Gleb Natapov , Josh Boyer , One Thousand Gnomes , Viresh Kumar , Dirk Brandewie , "cpufreq@vger.kernel.org" , Linux PM list , "Linux-Kernel@Vger. Kernel. Org" , "Richard W.M. Jones" [. . .] >> Here's host dmesg: https://bugzilla.kernel.org/attachment.cgi?id=119751 >> >>>> Can you ftrace the failure? >> >> Can try, need some time (rest of the day I'll be away travelling, >> will try to do it over the weekend, and update the Kernel >> bugzilla with observations). >> >>>> >>> Ugh, it looks like guest dmesg but there are KVM messages there too ("[ >>> 281.443662] kvm [2452]: vcpu0 unhandled rdmsr: 0xe8" is unhandled access >>> to MSR_IA32_APERF I was talking about above), so I guess this is nested >>> guest invocation? >> >> Yeah -- sorry, I forgot to note it's in a nested environment :( >> >>> Does it happen in non nested guest? >> >> I need to that. >> >> Note to self: Also try with a newer Kernel on the host. > > Please try the patch I posted earlier today when you're at it: > > https://patchwork.kernel.org/patch/3411991/ I applied the patch & tried to build the Kernel, it failed with: ======= . . . Generating a 4096 bit RSA private key ............................................................................................................drivers/cpufreq/intel_pstate.c: In function 'intel_pstate_init_cpu': drivers/cpufreq/intel_pstate.c:617:18: error: 'struct pstate_data' has no member named 'current_state' if (!cpu->pstate.current_state) { ^ ...make[2]: *** [drivers/cpufreq/intel_pstate.o] Error 1 make[1]: *** [drivers/cpufreq] Error 2 make[1]: *** Waiting for unfinished jobs.... .....................................make: *** [drivers] Error 2 make: *** Waiting for unfinished jobs.... ...................................++ ======= I'll try it on Fedora Kernel git, do a test build and re-try again. -- /kashyap