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 A3B3939CD11; Wed, 2 Sep 2026 06:57:06 +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=1788332228; cv=none; b=SDSbr3l8Pb17ikUzfXdVdZVN18U1YzxW6VbhvmhYD+jcZT1PxHLQdn/FPw5+MoStgbsIOuebFS7ynSVnEZ0cND97x2OUNapcN5NYQcFbSySUzUoTNgVlXLRCfSMNif9GEzCB0AVU9GZVDjpObIV6DYqhnWrAhvgAxUukLdDRvYE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788332228; c=relaxed/simple; bh=BeSt1yLLBygtJDuknwIfiypESPW1R02Br6MDmScUFvw=; h=Date:Message-ID:From:To:Cc:Subject:In-Reply-To:References; b=SAljEnCBtQO7FHyk5pL/kByGHV0Yo8TMhL4FXfynCK8U7Tw20p6zvbdCXNJng0PMTxiF4hFi1b6t69h2Bd6Ho3caj8qVryRtNH1YyzI5kBegRbDZEiPujVF1agGI9PHK0ZvHDVQjmaQ+BnGs+fePMTBAOP5cEl/POL0h1+2k0Nk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=JFE/1VZS; 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="JFE/1VZS" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 155CD1F000E9; Wed, 2 Sep 2026 06:57:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1788332225; bh=BeSt1yLLBygtJDuknwIfiypESPW1R02Br6MDmScUFvw=; h=Date:From:To:Cc:Subject:In-Reply-To:References; b=JFE/1VZShS973TmqQMkWciGBNJCsf1VExYaQD7vZQ5+IN4HShuxW+nG27QQRfGFiU vZMbyLEeQONhgDolZSyK9TkXwXDYZY8oZrU7HKc8LKgYe4P4GsGjWJc9P1FM2gebQk EcV+DojYS5vyHZjt1sF2tE6K0v3Irt0bvZSb6HFCXwMZrUCj2EVs0Fne/XOHlk2ogm oulzVdu3U2LHY75lRSnU0UtrjS0+pSfLg4anpf54JoO+VD1LSRQl/6NQEijSERnNy0 kR+YtfvTKahTXBso2wi1d5cS1j3ZhPNDnarl2M4JsgFyfSg/oyjTCSNzfTN+D8z9zf +2Q7IHgq/a2zw== Date: Tue, 01 Sep 2026 20:57:04 -1000 Message-ID: From: Tejun Heo To: Qiurong Fang Cc: void@manifault.com, arighi@nvidia.com, changwoo@igalia.com, emil@etsalapatis.com, zhanxusheng@xiaomi.com, sched-ext@lists.linux.dev, linux-kernel@vger.kernel.org Subject: Re: [PATCH v2] sched_ext: Skip per-CPU data allocation for built-in DSQs In-Reply-To: <20260901013258.1822890-1-fangqiurong@kylinos.cn> References: <20260827082329.3368255-1-fangqiurong@kylinos.cn> <20260901013258.1822890-1-fangqiurong@kylinos.cn> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Applied to sched_ext/for-7.4 with Zhan's Reviewed-by added, the description reworded to say the waste is quadratic in the CPU count, and the scx_init_dsq() comment reworded as the local DSQ does track deferred reenqs, just through sch->pcpu. Thanks. -- tejun