From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E0CBAC433B4 for ; Wed, 21 Apr 2021 13:33:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 99CED61449 for ; Wed, 21 Apr 2021 13:33:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241193AbhDUNdz (ORCPT ); Wed, 21 Apr 2021 09:33:55 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44936 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239412AbhDUNdw (ORCPT ); Wed, 21 Apr 2021 09:33:52 -0400 Received: from desiato.infradead.org (desiato.infradead.org [IPv6:2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3CA8BC06174A for ; Wed, 21 Apr 2021 06:33:16 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=m8+ukUnKX1UN4v+oEFo61NeqPbdozFzIkzd1W6ilz2c=; b=NpAIwf66aozx1FI0vafphGaIzm Nf3+CvhIYsqvOqLsT+/ymDDoj2qubI+Gk0j+3ktoXiLMHK441VG6MUEUhsnA1CR7SPeS9nP8ibSVh xhgcNjNR5gZ6LDbZGa3XVEHD8fo0+bjtAVrBq9/cdgIZv9unG5iROOv9g3G1RZKmSeZF/mSfvI7dK vHgbBYcTJc56lBar0iCGfSgsgQLS9GB0FTtuFi5MLkxOS7hYt/wSQ896v2hbyg3HwPaaQOZJtPBbu xY0O5OuxQ7pyJ0cOoJN2UpKdLa0005eIm3jPdFxGrdKEh1tO2uPsx/DFfmSAwmvENqCBdrw8gEwDq AyN9SdlA==; Received: from j217100.upc-j.chello.nl ([24.132.217.100] helo=noisy.programming.kicks-ass.net) by desiato.infradead.org with esmtpsa (Exim 4.94 #2 (Red Hat Linux)) id 1lZCyY-00ETCz-4t; Wed, 21 Apr 2021 13:33:08 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id B8B6730013E; Wed, 21 Apr 2021 15:33:04 +0200 (CEST) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id 68AA428582675; Wed, 21 Apr 2021 15:33:04 +0200 (CEST) Date: Wed, 21 Apr 2021 15:33:04 +0200 From: Peter Zijlstra To: joel@joelfernandes.org, chris.hyser@oracle.com, joshdon@google.com, mingo@kernel.org, vincent.guittot@linaro.org, valentin.schneider@arm.com, mgorman@suse.de Cc: linux-kernel@vger.kernel.org, tj@kernel.org, tglx@linutronix.de Subject: Re: [PATCH 4/9] sched: Default core-sched policy Message-ID: References: <20210401131012.395311786@infradead.org> <20210401133917.291069972@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210401133917.291069972@infradead.org> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Apr 01, 2021 at 03:10:16PM +0200, Peter Zijlstra wrote: > Implement default core scheduling policy. > > - fork() / clone(): inherit cookie from parent > - exec(): if cookie then new cookie > > Did that exec() thing want to change cookie on suid instead, just like > perf_event_exit_task() ? Talk to me about that exec() thing; I still think it's weird. Did we just want to drop cookie on suid instead?