From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 9C49F224B05; Tue, 1 Sep 2026 19:59:58 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788292799; cv=none; b=QYoQg57s6YA++1K9XXh5T6MfoCFtzWtIE0jDrQdPy/BELLfKHlU+OEHJWKcu/1pzurOjodveYzOg6MRfAWkxHkJUP01DKnYtmTX5P+N5Qyg1X6OgVZK7gtZ7E8hSDneQYFmvSpMSmB8/FnlnXtNrRUNm16FJmyO63lM40BZoWJA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788292799; c=relaxed/simple; bh=ebepbB9G4qAeFx1DsXm06NPoF3vBhPwUoQg5inM6KME=; h=Date:Message-ID:From:To:Cc:Subject:In-Reply-To:References; b=ijF0F64t4xN7dqBjsaW/qVDvx+L5THfeZMwmZGclJfXSqjnWwSjzzWs7z2BclrvK1RaN70Xp3dV7csvLZWY4XJrr4jQfojUj4qWQmRkfTC1HDLNFsRZZEVoHmx4FmB8vNL1yPFuQoFdgNo3vfg4yQnGIo0GrBweGP2kIg6nOXYM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=gt9nIEfM; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="gt9nIEfM" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0532B1F000E9; Tue, 1 Sep 2026 19:59:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1788292798; bh=ebepbB9G4qAeFx1DsXm06NPoF3vBhPwUoQg5inM6KME=; h=Date:From:To:Cc:Subject:In-Reply-To:References; b=gt9nIEfM+3bTaBDa7zuuOOR4rBEjShoMQ5wtewKKwCzvC/F0r/m8wbiboKwlO83UB zjgekqWOO18RA4xvsXjQ2DAWno/VpDFWHyoGQZU3CgNxXM9/RLcUKJsyVdt+n4rDa1 4GcXq6jCTxEGyK/iRfM+1lvXZVL8MiLjLxVAQnxzHh2f79UGr8oWzeJXBhPZXRwk4s ZD4Y8BZD9G63Q1j8e0WKnhHwvGX0EJlOEbpk0w8iI+a7J515sJBa2sDtRBxkFcyWuU rX32/8RuA8JeoDalBpmET5BoowodWQgEwZqe3op+NsSE/CP1D0GT9wJCaFnj8K0McL sXiMYMyMCCVrQ== Date: Tue, 01 Sep 2026 09:59:57 -1000 Message-ID: <0cbe2f233f77f013361d4593a88bac38@kernel.org> From: Tejun Heo To: Tao Cui Cc: arighi@nvidia.com, void@manifault.com, changwoo@igalia.com, michalblk@google.com, liwanwu@kylinos.cn, sched-ext@lists.linux.dev, linux-kernel@vger.kernel.org, bpf@vger.kernel.org, Tao Cui Subject: Re: [PATCH v2 1/2] sched_ext: document the rolling-cursor requirement for dsq_vtime In-Reply-To: <20260901140343.764080-2-cui.tao@linux.dev> References: <20260901140343.764080-1-cui.tao@linux.dev> <20260901140343.764080-2-cui.tao@linux.dev> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Hello, On Tue, Sep 01, 2026 at 10:03:42PM +0800, Tao Cui wrote: ... > + * should stay within half the u64 range (2^63) of each other so that > + * time_before64() ordering remains well-defined. Two values exactly 2^63 apart are before each other in both directions, so "less than 2^63 apart". Also, please fold this into the paragraph above. Thanks. -- tejun