From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wr1-f73.google.com (mail-wr1-f73.google.com [209.85.221.73]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 2B64728134C for ; Mon, 2 Feb 2026 16:23:22 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.221.73 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770049403; cv=none; b=CPlX68g86EjWZkY53LF+5/daEcKnNt4X0XxUzEotvjOhtsjsmOJRljziy1aRYohvLsXD2lL5jD/LCCLfLabAQMQiwYGdLbblJKPYTh+UegUHB6ETKm+FvGNvmXSl0VQw7Ei64/5SIz6ERUFiywzFk8kvl+k5RS5eSb8BGz3k+bY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770049403; c=relaxed/simple; bh=pQZoT6Y4K8pKVEJCNefkiWvGdDfj0p/SjpdkYyfs4J0=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=ctWj/DMXCIkS30OXtVPbKvMiMETal7dTMii8iE93aZqNNkWNpTxfQ1rHHyeuCRUD1zDksuo1FgXMsHXnBamXLMVCEedxBisqkFWHB+vxQ+qVR7CAlYdQq0F9BFgiLGZp6j8DZlMYVtOyQuGSxuaptV4FXNjlButvyCWqkDasIM8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--jpiecuch.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=PRPFbR7Y; arc=none smtp.client-ip=209.85.221.73 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--jpiecuch.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="PRPFbR7Y" Received: by mail-wr1-f73.google.com with SMTP id ffacd0b85a97d-431026b6252so4741826f8f.1 for ; Mon, 02 Feb 2026 08:23:21 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1770049400; x=1770654200; darn=vger.kernel.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=1Gwk8eQ5wUeRhu8FK4dC5BwQ5ED+3LlOf9MmormlXz8=; b=PRPFbR7YSxBvjvBXJRnrnR8/N2FMkw+3TuuIhiSTUCPNp9TomGOhCftzgof0EsJ1CK Lcf02t96SAnKQRs828HzNwo2ABg9cK40aD4uYDcJKGaV1tJF+IEQFje0Sf/hv6XFxYW+ 1uQO5XgyYB50ZTsiymNvwVRAE2MVMXVzA4tIeOXSPhqRYufnZKI6rvvKfCaxzY6lxIgM nXaSNr8flu3MaXW5CHUGVfoqdD0JYSeJ3eBjII7O5cBcH9jsX+4HV6PZgjNLAD/APBd0 IIkYP3OdVAe4rF8pTCyIz7zdTYb/JoISKPe60kV/ksSmBQZuMLKTm5W90PTKs2YWc2JU aXaQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1770049400; x=1770654200; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=1Gwk8eQ5wUeRhu8FK4dC5BwQ5ED+3LlOf9MmormlXz8=; b=b6+5gFv9qwvb5zo2cMzn0UAbA2wN6JmCR5PB3T7lNSwQQ1t5GPMgkfY3mzF14cYzLY kMoReBU/nRtmT8inEPRZHGVc4iuitpRVV5ifMXmQIks8TrIAIliCQnqxCcTzFyRjWyRP Ff1DqMLDC+wEvvfp/n5gY+/6ZL+wn5xWSNO/9ynOPfCwC0O3SEBUcd2Nv2QsqWZWCikQ c7A1F683TLcvWSZsVMSmbSQ4r8/EeJwnpc9lTF2my9733DFEkHJ+JrUBMBqz67ew0nWp aBOG1aNU23JwfCHygRvqJjP97R9L0R+m7Vupw3sZc5zRZIixaOS2CGGA8Qf+YZILAa3y aUDQ== X-Forwarded-Encrypted: i=1; AJvYcCUWVAiZW8ceMKi+ZKqooJOT/s0EYI1zEt/vIAQwOQyRI44rqHucS8aIeSMeOOnLWhN6VNraMLkdOO0Qqc0=@vger.kernel.org X-Gm-Message-State: AOJu0YyVVDCxVmPTDV0QHs0BhaeL7Maw+aMk2rygqIr7eIv8dgbZ3jQx YLWb+yHeWWdbbL+qYzu2cuhat/Q9a1K23RlLFf58ud0UdlGUk34WNsk9BCQMLA5xgZ53b1nr5lC 2+HDdKDS6AIg6Dw== X-Received: from wrm4.prod.google.com ([2002:a05:6000:26c4:b0:435:99e6:7da6]) (user=jpiecuch job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6000:26cc:b0:435:953e:589c with SMTP id ffacd0b85a97d-435f3aaa43bmr16885535f8f.34.1770049400431; Mon, 02 Feb 2026 08:23:20 -0800 (PST) Date: Mon, 02 Feb 2026 16:23:19 +0000 In-Reply-To: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260126084258.3798129-1-arighi@nvidia.com> <20260126084258.3798129-2-arighi@nvidia.com> X-Mailer: aerc 0.21.0-0-g5549850facc2 Message-ID: Subject: Re: [PATCH 1/2] sched_ext: Fix ops.dequeue() semantics From: Kuba Piecuch To: Andrea Righi , Tejun Heo Cc: Kuba Piecuch , David Vernet , Changwoo Min , Christian Loehle , Daniel Hodges , , , Emil Tsalapatis Content-Type: text/plain; charset="UTF-8" On Mon Feb 2, 2026 at 3:52 PM UTC, Andrea Righi wrote: > On Sun, Feb 01, 2026 at 07:43:33AM -1000, Tejun Heo wrote: >> On Fri, Jan 30, 2026 at 11:54:00AM +0000, Kuba Piecuch wrote: >> > Is "local" short for "local or global", i.e. not user-created? >> >> Yes, maybe it'd be useful to come up with a terminology for them. e.g. >> terminal - once a task reaches a terminal DSQ, the only way that the BPF >> scheduler can affect the task is by triggering re-enqueue (although we don't >> yet support reenqueueing global DSQs). > > I like "terminal DSQ", if there's no objection I'll update the > documentation using this terminology. "Built-in" would also work and avoids introducing new terminology, but it doesn't provide any insight into why these DSQs are special, whereas "terminal" suggests there's some finality to inserting a task there. I'm slightly leaning towards "terminal". Thanks, Kuba