From mboxrd@z Thu Jan 1 00:00:00 1970 From: Grammostola Rosea Subject: [LAU] [Fwd: Re: realtime kernel for Debian] Date: Tue, 24 Mar 2009 16:42:05 +0100 Message-ID: <49C8FF4D.1040204@gmail.com> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="------------060408060306030307000000" To: pkg-multimedia-maintainers-XbBxUvOt3X2LieD7tvxI8l/i77bcL1HB@public.gmane.org, linux-audio-user , linux-rt-users-u79uwXL29TY76Z2rM5mHXA@public.gmane.org Return-path: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: linux-audio-user-bounces-cunTk1MwBs/CEJeg2xFRV2D2FQJk+8+b@public.gmane.org Errors-To: linux-audio-user-bounces-cunTk1MwBs/CEJeg2xFRV2D2FQJk+8+b@public.gmane.org List-Id: linux-rt-users.vger.kernel.org This is a multi-part message in MIME format. --------------060408060306030307000000 Content-Type: text/plain; charset=ISO-8859-15; format=flowed Content-Transfer-Encoding: 7bit Hi, There is an promising discussion on the debian-dev mailinglist. Maybe some people who knows more about realtime kernels could join. Also users who might want to have an realtime kernel in Debian and/or want help testing could join the discussion. I think it would be nice if there is also an realtime kernel in Debian or that the default kernel would be improved for realtime (audio) usage. http://www.debian.org/MailingLists/subscribe \r --------------060408060306030307000000 Content-Type: message/rfc822; name="Re: realtime kernel for Debian.eml" Content-Transfer-Encoding: 7bit Content-Disposition: inline; filename="Re: realtime kernel for Debian.eml" X-Account-Key: account6 X-Mozilla-Keys: Delivered-To: rosea.grammostola-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org Received: by 10.223.113.73 with SMTP id z9cs21839fap; Tue, 24 Mar 2009 05:27:11 -0700 (PDT) Received: by 10.223.105.195 with SMTP id u3mr7042507fao.13.1237897631472; Tue, 24 Mar 2009 05:27:11 -0700 (PDT) Return-Path: Received: from liszt.debian.org (liszt.debian.org [82.195.75.100]) by mx.google.com with ESMTP id 12si3539083fxm.88.2009.03.24.05.27.11; Tue, 24 Mar 2009 05:27:11 -0700 (PDT) Received-SPF: pass (google.com: domain of bounce-debian-devel=rosea.grammostola=gmail.com-0aAXYlwwYIJuHlm7Suoebg@public.gmane.org designates 82.195.75.100 as permitted sender) client-ip=82.195.75.100; Authentication-Results: mx.google.com; spf=pass (google.com: domain of bounce-debian-devel=rosea.grammostola=gmail.com-0aAXYlwwYIJuHlm7Suoebg@public.gmane.org designates 82.195.75.100 as permitted sender) smtp.mail=bounce-debian-devel=rosea.grammostola=gmail.com-0aAXYlwwYIJuHlm7Suoebg@public.gmane.org Received: from localhost (localhost [127.0.0.1]) by liszt.debian.org (Postfix) with QMQP id DE59E13A60F3; Tue, 24 Mar 2009 12:27:05 +0000 (UTC) Old-Return-Path: X-Spam-Checker-Version: SpamAssassin 3.2.3 (2007-08-08) on liszt.debian.org X-Spam-Level: X-Spam-Status: No, score=-8.9 required=4.0 tests=FOURLA,LDO_WHITELIST, RCVD_IN_DNSWL_MED autolearn=failed version=3.2.3 X-Original-To: lists-debian-devel-1HHIdfaasAxuHlm7Suoebg@public.gmane.org Delivered-To: lists-debian-devel-1HHIdfaasAxuHlm7Suoebg@public.gmane.org Received: from localhost (localhost [127.0.0.1]) by liszt.debian.org (Postfix) with ESMTP id A6BCC13A6054 for ; Tue, 24 Mar 2009 12:26:56 +0000 (UTC) Received: from liszt.debian.org ([127.0.0.1]) by localhost (lists.debian.org [127.0.0.1]) (amavisd-new, port 2525) with ESMTP id 24492-91 for ; Tue, 24 Mar 2009 12:26:53 +0000 (UTC) X-policyd-weight: DYN_NJABL=ERR NOT_IN_SBL_XBL_SPAMHAUS=-1.5 NOT_IN_BL_NJABL=-1.5 DSBL_ORG=ERR CL_IP_EQ_HELO_IP=-2 (check from: .debian. - helo: .xsmtp0.ethz. - helo-domain: .ethz.) FROM/MX_MATCHES_NOT_HELO(DOMAIN)=0 , rate: -5 Received: from XSMTP0.ethz.ch (xsmtp0.ethz.ch [82.130.70.14]) by liszt.debian.org (Postfix) with ESMTP id 8273413A5F0B for ; Tue, 24 Mar 2009 12:26:38 +0000 (UTC) Received: from xfe0.d.ethz.ch ([82.130.124.40]) by XSMTP0.ethz.ch with Microsoft SMTPSVC(6.0.3790.3959); Tue, 24 Mar 2009 13:26:35 +0100 Received: from [82.130.121.208] ([82.130.121.208]) by xfe0.d.ethz.ch over TLS secured channel with Microsoft SMTPSVC(6.0.3790.3959); Tue, 24 Mar 2009 13:26:36 +0100 Message-ID: <49C8D17B.7000905-8fiUuRrzOP0dnm+yROfE0A@public.gmane.org> Date: Tue, 24 Mar 2009 13:26:35 +0100 From: "Giacomo A. Catenazzi" User-Agent: Thunderbird 2.0.0.21 (Windows/20090302) MIME-Version: 1.0 To: debian-devel-0aAXYlwwYIJuHlm7Suoebg@public.gmane.org Subject: Re: realtime kernel for Debian References: <49C3A1ED.1030302-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> <219871bf0903221215n39a9ec16h74c71678500b8807-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> <49C8B51A.3010504-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> <49C8BB66.6010509-8fiUuRrzOP0dnm+yROfE0A@public.gmane.org> <20090324114657.GO11087@rivendell> In-Reply-To: <20090324114657.GO11087@rivendell> Content-Type: text/plain; charset=ISO-8859-15; format=flowed Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 24 Mar 2009 12:26:36.0385 (UTC) FILETIME=[C640A510:01C9AC7B] X-Virus-Scanned: at lists.debian.org with policy bank en-ht X-Amavis-Spam-Status: No, score=-6.9 tagged_above=3.6 required=5.3 tests=[BAYES_00=-2, FOURLA=0.1, LDO_WHITELIST=-5] X-Rc-Virus: 2007-09-13_01 X-Rc-Spam: 2008-11-04_01 Resent-Message-ID: Resent-From: debian-devel-0aAXYlwwYIJuHlm7Suoebg@public.gmane.org X-Mailing-List: archive/latest/248894 X-Loop: debian-devel-0aAXYlwwYIJuHlm7Suoebg@public.gmane.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: Precedence: list Resent-Sender: debian-devel-request-0aAXYlwwYIJuHlm7Suoebg@public.gmane.org Resent-Date: Tue, 24 Mar 2009 12:27:05 +0000 (UTC) Raphael Hertzog wrote: > On Tue, 24 Mar 2009, Giacomo A. Catenazzi wrote: >> Do you really need real time kernel? >> Debian is a technical driven project, but reading the previous two quotes, >> "real time" is used as marketing thing. > > It's good to question the use of any feature, but a real-time kernel is > certainly very useful in many industrial applications and Debian is > popular in that field. (Don't put a marketing label on anything where > you are not yourself sure of your expertise.) Yes, I didn't write very well my sentence: the previous quotes was more about "there exist rt kernels", "ubuntu has a rt kernel", but not solid requirements. I had to write some "seems", and I'm sorry for the two quoted people if it seems an attack. Anyway, later in the mail, I asked for precise needs, so we could see better what we should improve. IMHO most users want a low latency kernel, but not a slower kernel, so a CONFIG_HZ_1000 would be nice. But the original post was about multimedia production (and not reproduction), so the needs are probably other. My point was more: - Debian has not rt kernel. Why? Non DD interested or/and low demand? This is an important point. We must not produce a rt-kernel if we cannot provide testers and developers (in unstable). - kernel management is a weak point in distribution: no good method for kernel dependencies, using full capabilities, ... so IMHO we should try harder with the normal kernel, so that we can use the same infrastructure and testers. If we fail and we are able to support rt kernels, IMO it is good to provide it in Debian. The original mail was about "multimedia production" and few year ago kernel developers had a lot of interaction with music industries. I'm not an expert in the field, but how far are we in their need with standard kernels?) > I do use a real-time kernel on a Debian based system for one of my > customers (but I have to recompile the kernel anyway because I do other > customizations) and I have good reasons to do so because I can't suffer > serial overrun and I must ensure that the serial interrupt handler > is run in the required time and that no other (kernel) task has higher > priority. These *other customizations* are important to rt-kernel. So we need a person (or more) that know the needs and could support us. "realtime" alone is only a label ;-) ciao cate -- To UNSUBSCRIBE, email to debian-devel-REQUEST-0aAXYlwwYIJuHlm7Suoebg@public.gmane.org with a subject of "unsubscribe". Trouble? Contact listmaster-0aAXYlwwYIJuHlm7Suoebg@public.gmane.org --------------060408060306030307000000 Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ Linux-audio-user mailing list Linux-audio-user-cunTk1MwBs/CEJeg2xFRV2D2FQJk+8+b@public.gmane.org http://lists.linuxaudio.org/mailman/listinfo/linux-audio-user --------------060408060306030307000000--