Path: csiph.com!fu-berlin.de!news.servidellagleba.it!bofh.it!news.nic.it!robomod From: Qais Yousef Newsgroups: linux.debian.kernel,linux.debian.bugs.dist Subject: Re: Enable CONFIG_UCLAMP_TASK by default in debian Date: Wed, 31 May 2023 20:20:01 +0200 Message-ID: References: X-Mailbox-Line: From debian-kernel-request@lists.debian.org Wed May 31 18:12:12 2023 Old-Return-Path: X-Amavis-Spam-Status: No, score=-1.89 tagged_above=-10000 required=5.3 tests=[BAYES_00=-2, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, FOURLA=0.1, MURPHY_DRUGS_REL8=0.02, RCVD_IN_DNSWL_NONE=-0.0001, T_SCC_BODY_TEXT_LINE=-0.01] autolearn=no autolearn_force=no X-Policyd-Weight: NOT_IN_SBL_XBL_SPAMHAUS=-1.5 CL_IP_EQ_HELO_IP=-2 (check from: .layalina. - helo: .mail-lf1-x134.google. - helo-domain: .google.) FROM/MX_MATCHES_HELO(DOMAIN)=-2; rate: -5.5 X-Gm-Message-State: AC+VfDygsknsiy/nGPrbXTH6NYXYb5ITdI9dM4a4wf2j35MSSFX2bGJl LAlS2lnZFYTb6Vb/TsDZw6Hd9GQufFWmfFGG/Vs= X-Google-SMTP-Source: ACHHUZ5VDTR4an8youDzS4C6jccoomci/GTjLo+4053J59XEbxmK6XE3cYzvF7ObMqfFyGX5oWxA3w== X-Received: by 2002:ac2:43b0:0:b0:4ed:c61d:c8e8 with SMTP id t16-20020ac243b0000000b004edc61dc8e8mr3349604lfl.29.1685555640942; Wed, 31 May 2023 10:54:00 -0700 (PDT) MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline X-Mailing-List: archive/latest/138612 List-ID: List-URL: List-Archive: https://lists.debian.org/msgid-search/20230531175359.7w4opwyee3j6pdme@airbuntu Approved: robomod@news.nic.it Lines: 38 Organization: linux.* mail to news gateway Sender: robomod@news.nic.it X-Original-Date: Wed, 31 May 2023 18:53:59 +0100 X-Original-Message-ID: <20230531175359.7w4opwyee3j6pdme@airbuntu> X-Original-References: <20230520215002.w2h4mzvbweym3ifn@airbuntu> Xref: csiph.com linux.debian.kernel:79189 linux.debian.bugs.dist:1148472 On 05/24/23 10:18, Salvatore Bonaccorso wrote: > Package: src:linux > Version: 6.1.27-1 > Severity: wishlist > > Hi > > On Sat, May 20, 2023 at 10:50:02PM +0100, Qais Yousef wrote: > > Hi > > > > Debian kernels don't ship with CONFIG_UCLAMP_TASK and CONFIG_UCLAMP_TASK_GROUP > > configs enabled in the kernel, is there any reason for that? > > > > These configs enable smarter performance management for tasks and it'd be good > > to know if there's a reason preventing you from enabling it. > > > > Some useful docs: > > > > https://kernel.org/doc/html/latest/scheduler/sched-util-clamp.html?highlight=util+clamp > > https://man7.org/linux/man-pages/man1/uclampset.1.html > > > > Happy to contribute patches if that helps. > > I cannot yet judge if it is sensible, as unkown which impact it > otherwise has to enable those, but let's make a tracking bug for your > request. Sorry for the delayed response. When uclamp is not used, it's protected with a static key in the kernel, so should add no extra overhead when not used; if that's the concern you have. Ubuntu ships with these configs enabled FWIW. Thanks for creating the bug! -- Qais Yousef