Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754478AbYHLQjf (ORCPT ); Tue, 12 Aug 2008 12:39:35 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752237AbYHLQjY (ORCPT ); Tue, 12 Aug 2008 12:39:24 -0400 Received: from mu-out-0910.google.com ([209.85.134.189]:21199 "EHLO mu-out-0910.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753960AbYHLQjU (ORCPT ); Tue, 12 Aug 2008 12:39:20 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=date:from:to:cc:subject:message-id:references:mime-version :content-type:content-disposition:in-reply-to:user-agent; b=QnwuVyE6cxNlWuhjLwXduyjqsSadRIowgx4mqFdtcy+S8SRA+mvSD0d+QJYKoyVnvo uQ5W1l0sTnSsq0LHP4HdV4zNFVyZ+a9G6Dk8LCpJ14gz54J3ZKMG2xhBkwYLqPjWX2ED hkU+6dABfhpgvk/w8WywaZ0tN5eWxt8ksLK1s= Date: Tue, 12 Aug 2008 18:37:28 +0200 From: Marcin Slusarz To: Steven Rostedt Cc: "Rafael J. Wysocki" , LKML , Ingo Molnar , Thomas Gleixner , linux-pm@lists.linux-foundation.org Subject: Re: resume from s2ram regression (bisected to ftrace...) Message-ID: <20080812163724.GA5395@joi> References: <20080810170801.GA5739@joi> <200808101940.13753.rjw@sisk.pl> <20080810192444.GA5296@joi> <200808102148.03046.rjw@sisk.pl> <48A08475.1090805@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <48A08475.1090805@redhat.com> User-Agent: Mutt/1.5.16 (2007-06-09) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2242 Lines: 70 On Mon, Aug 11, 2008 at 02:27:01PM -0400, Steven Rostedt wrote: > Rafael J. Wysocki wrote: >> On Sunday, 10 of August 2008, Marcin Slusarz wrote: >> >>> On Sun, Aug 10, 2008 at 07:40:12PM +0200, Rafael J. Wysocki wrote: >>> >>>> On Sunday, 10 of August 2008, Marcin Slusarz wrote: >>>> >>>>> Hi >>>>> >>>>> Few days ago I discovered that resume from suspend to ram does not work >>>>> anymore >>>>> on my 2.6.27-rc2 (actually 796aadeb1b2db9b5d463946766c5bbfd7717158c) >>>>> gentoo box. >>>>> My computer just boots on resume. Today I had enough time to bisect it >>>>> and found >>>>> (after 1 panic and 1 build breakage) out "the reason": >>>>> >>>>> $ git bisect good >>>>> d05cdb25d80f06f77aa6bddb53cd1390d4d91a0b is first bad commit >>>>> commit d05cdb25d80f06f77aa6bddb53cd1390d4d91a0b >>>>> Author: Steven Rostedt >>>>> Date: Mon May 12 21:20:54 2008 +0200 >>>>> >>>>> ftrace: fix dynamic ftrace selftest >>>>> >>>> Does it still happen if: >>>> - CONFIG_FTRACE is unset >>>> >>> no >>> >>> >>>> - CONFIG_FTRACE is set, but CONFIG_FTRACE_STARTUP_TEST is unset? >>>> >>> yes >>> >> >> Thanks for testing. >> >> Well, ftrace is a new feature in 2.6.27, IIRC, so this is not a regression >> in >> the strict sense. >> >> Still, of couse, there is a bug in ftrace that needs to be fixed. Steven? >> > Sorry for the late response. > > Red Hat changed its mail servers, and my mail was in limbo for a while. > > I'm not doubting that FTRACE enabled breaks suspend to ram, but I find it > highly unlikely that the commit you posted was the culprit. Especially > since it still breaks when STARTUP_TEST is disabled. That change was a > STARTUP_TEST change only. Perhaps it just moved things around enough to > cause your issues. > > But you say that if you take Linus's latest git tree, and revert only this > change, it works?? Yes. > Hmm, this is very strange. I agree. Any idea how to debug it? Marcin -- 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/