Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753742AbaJIDmy (ORCPT ); Wed, 8 Oct 2014 23:42:54 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:54408 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751643AbaJIDmq (ORCPT ); Wed, 8 Oct 2014 23:42:46 -0400 Date: Wed, 8 Oct 2014 20:41:47 -0700 From: "gregkh@linuxfoundation.org" To: zhangzhiqiang Cc: Will Deacon , Mark Rutland , "cov@codeaurora.org" , "lizefan@huawei.com" , "wangnan0@huawei.com" , "stable@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "linux-arm-kernel@lists.infradead.org" Subject: Re: [PATCH] arm: armv7: perf: fix armv7 ref-cycles error Message-ID: <20141009034147.GC19906@kroah.com> References: <5434AA24.7010600@huawei.com> <20141008091741.GC26140@arm.com> <20141008133147.GC5119@kroah.com> <20141008133802.GO26140@arm.com> <5435FBD8.7020109@huawei.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <5435FBD8.7020109@huawei.com> User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Oct 09, 2014 at 11:07:04AM +0800, zhangzhiqiang wrote: > On 2014/10/8 21:38, Will Deacon wrote: > > On Wed, Oct 08, 2014 at 02:31:47PM +0100, gregkh@linuxfoundation.org wrote: > >> On Wed, Oct 08, 2014 at 10:17:41AM +0100, Will Deacon wrote: > >>> On Wed, Oct 08, 2014 at 04:06:12AM +0100, zhangzhiqiang wrote: > >>>> hi all, > >>>> ---------------------------------------- > >>>> > >>>> ref-cycles event is specially to Intel core, but can still used in arm architecture > >>>> with the wrong return value with 3.10 stable. for instance: > >>>> > >>>> perf stat -e ref-cycles sleep 1 > >>>> > >>>> Performance counter stats for 'sleep 1': > >>>> > >>>> 0 ref-cycles > >>>> > >>>> 1.002381916 seconds time elapsed > >>>> > >>>> this patch fix the bug and make it return NOT SUPPORTED > >>>> distinctly. > >>>> > >>>> In upstream this bug has been fixed by other way(not primary for the bug), which changes more than one file > >>>> and more than 1000 lines. the primary commit is 6b7658ec8a100b608e59e3cde353434db51f5be0. > >>>> besides we can not simply cherry-pick. > >>> > >>> I thought I saw Greg pick this up the other day? > >> > >> Yes, it's in 3.16.4, did I do something wrong by accepting it? > > > > Nah, it's a trivial patch that I struggle to get excited about. I'm just not > > sure why it's being sent again, after you already accepted it. > > Yes, it's in 3.16.4, in my opinion 3.10 need it too, can we put it into 3.10 or > do we have the plan? Does it apply to 3.10-stable? Did you test it there and see if it resolves your issue? thanks, greg k-h -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/