From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from list by lists.gnu.org with archive (Exim 4.71) id 1ZMfvL-0004ij-HD for mharc-qemu-trivial@gnu.org; Tue, 04 Aug 2015 13:22:47 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:54456) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZMfvA-0004bs-D4 for qemu-trivial@nongnu.org; Tue, 04 Aug 2015 13:22:42 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ZMfv7-0002zb-7Z for qemu-trivial@nongnu.org; Tue, 04 Aug 2015 13:22:36 -0400 Received: from mail-wi0-f179.google.com ([209.85.212.179]:35774) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZMfv7-0002zT-1E for qemu-trivial@nongnu.org; Tue, 04 Aug 2015 13:22:33 -0400 Received: by wibxm9 with SMTP id xm9so175934473wib.0 for ; Tue, 04 Aug 2015 10:22:32 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:references:from:to:cc:subject:in-reply-to:date :message-id:mime-version:content-type:content-transfer-encoding; bh=itoVEpjI5Xk3z8n1EdX/iBpiqwX72ZTF6fOgz6E+8RY=; b=hJdAymVgb1IPAOpXysiFzDC4wSMi8AoMbtMtVsgUODHjkx4HNRtchiqI3GywQuFkxm S68GJA+qdal+8hQTkdk6YzhQqCLY3gvrGZbStkh1EKvx7OHsKlXXtqKYOUI0+PiGGwOt fda1RHb2jArq9Cov5PeM4trMXYoRRb35uvFgoexN2T0KeMFaM1wR/4smAbnsb3cRTw6d gjGGBAT5QArAQdog86g35yOl2VXvE8KduZEcgbbKkNO3ruBwotkeag4f7yhwI25k6PFj 8zQ3HDEMoA8+pMYcf/RT6xc6O3qu/s4AOz0LN5HV0KVgqd2e+lfCi1JQVhOfQJkAN4pc YHJg== X-Gm-Message-State: ALoCoQn5omu9qpbp2e+/MW8ssu9fJ1CjukmnfO2V8HshZ5dNoxCUHM31Fosq+zsR/B0spf/b8w5P X-Received: by 10.181.25.234 with SMTP id it10mr859586wid.41.1438708952511; Tue, 04 Aug 2015 10:22:32 -0700 (PDT) Received: from zen.linaro.local ([81.128.185.34]) by smtp.gmail.com with ESMTPSA id ib9sm2878739wjb.2.2015.08.04.10.22.30 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 04 Aug 2015 10:22:31 -0700 (PDT) Received: from zen.linaro.local (localhost [127.0.0.1]) by zen.linaro.local (Postfix) with ESMTPS id 35E6B3E04A7; Tue, 4 Aug 2015 18:22:30 +0100 (BST) References: <1438593291-27109-1-git-send-email-alex.bennee@linaro.org> <1438593291-27109-4-git-send-email-alex.bennee@linaro.org> <20150804121616.GA8192@aurel32.net> <87h9ofks0j.fsf@linaro.org> <55C0D879.90404@twiddle.net> From: Alex =?utf-8?Q?Benn=C3=A9e?= To: Richard Henderson In-reply-to: <55C0D879.90404@twiddle.net> Date: Tue, 04 Aug 2015 18:22:30 +0100 Message-ID: <87d1z3klyh.fsf@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.85.212.179 Cc: Peter Maydell , QEMU Trivial , QEMU Developers , Peter Crosthwaite , Paolo Bonzini Subject: Re: [Qemu-trivial] [Qemu-devel] [PATCH v4 03/11] qemu-log: correct help text for -d cpu X-BeenThere: qemu-trivial@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 04 Aug 2015 17:22:43 -0000 Richard Henderson writes: > On 08/04/2015 08:15 AM, Peter Maydell wrote: >> On 4 August 2015 at 16:11, Alex Bennée wrote: >>> Aurelien Jarno writes: >>>> On 2015-08-03 10:14, Alex Bennée wrote: >>>> In practice this is not true for linked TB. Should we also disable TB >>>> linking when this option is enabled? >>> >>> Good question. I suspect yes because if you've gone to level of wanting >>> exec tracing you'll probably get confused by the chaining. Of course it >>> will run a lot slower then. >> >> Unless the bug you were trying to track down is caused by the exec >> chaining, of course... But yes, I think we get more people wanting >> chaining to be disableable. >> >> Not sure we want to tie it to the 'cpu' debug option, though -- it >> applies just as much to 'exec'. > > Does it make more sense to have a 'nochain' debug option, and not tie it to > either 'cpu' or 'exec'? It might be occasionally useful on its own, simply to > determine if a bug does exist in the exec chaining. Would that make sense as a debug option or should we have a specific set of TCG options to alter its behaviour? > > > r~ -- Alex Bennée