From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 4DB722F8EBD; Thu, 7 May 2026 21:39:44 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778189984; cv=none; b=VP6I3p5XnvCQd2Lp/1I3wWV0KXA0kHsRyrFHGo7E6lSaFEHNM4AoXR3KlzlpUVYAvhv/kWnS9+UlnSn+piKc7MoAiB/sY+lyro7d225lV7GTaUlCZ4DblRUoz6CEfNtpbaPa03OZxMQup3+Q4Zm5WbNF8G0ZM+g+cfq2vnuNdhs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778189984; c=relaxed/simple; bh=/lteh37gFrcehzIfySkddYhObpzN3Kh7rgRZtnS3fSE=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=aCr1XlP3nFzzRSb5yX5bnvJZLOY4gqcY+Yp336rYtPBdnY1yQcoxPo5oL6YMCYtOZB4N+bUnUTolJhsqN4Qj8SRb9IUrM884uYaGFzgEgYGV3teIrlYXAhZ6oppQDpgnyZul96io2JnAjeQ/YSOLK/ID7DNsLaYMakGwo0nbI+s= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=d5NiLGTX; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="d5NiLGTX" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D3AB8C2BCB2; Thu, 7 May 2026 21:39:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1778189984; bh=/lteh37gFrcehzIfySkddYhObpzN3Kh7rgRZtnS3fSE=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=d5NiLGTX00uOl4BSim7PGAWnDNBOPMloqxlb8qjqPfZlKRlshwR+qjE2M4CKcDQNT B0nMVXcm/E2cmsZWWXj3VEFuIcW5UDcI20MaIPrssdvpcKspe04l1YDqreFhREjXXg VV7HqZSU412PI2aOlvXX94wOQdmSb/LLue+ewk9pbXRvvXe47LBQ2WvEWfeos515HQ bh6zIp3MoXkYMILGopvdEQ6ioQp3qT+G5NKZ+Z/gLeaw02vJ7gvdCiaijbGpyrcOaX Vt8vwGsGG0PJTl68zcDJ7uEtDrqrEXeQbUL5RW58SmTFhA/dy4PRHFc5nOoOTMNJXt IgC6ChnlVR5IA== Date: Thu, 7 May 2026 11:39:43 -1000 From: Tejun Heo To: Cheng-Yang Chou Cc: "Paul E. McKenney" , sched-ext@lists.linux.dev, David Vernet , Andrea Righi , Changwoo Min , rcu@vger.kernel.org, Ching-Chun Huang , Chia-Ping Tsai Subject: Re: [PATCH v2 2/2] sched_ext: Fix exit_cpu accuracy for lockup paths Message-ID: References: <20260504161543.674488-1-yphbchou0911@gmail.com> <20260504161543.674488-3-yphbchou0911@gmail.com> <20260505154006.G743b@cchengyang.duckdns.org> <20260506181409.Gc6e5@cchengyang.duckdns.org> Precedence: bulk X-Mailing-List: rcu@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260506181409.Gc6e5@cchengyang.duckdns.org> On Wed, May 06, 2026 at 06:18:11PM +0800, Cheng-Yang Chou wrote: > Hi Tejun, > > On Mon, May 04, 2026 at 10:34:09PM -1000, Tejun Heo wrote: > > On Tue, May 05, 2026 at 04:20:25PM +0800, Cheng-Yang Chou wrote: > > We carry only one cpu in exit_info but we can easily dump the cpumask and > > prioritize dumping all the cpus in the mask. > > To confirm: are you suggesting scx_rcu_cpu_stall() take a cpumask, use > cpumask_first() for exit_cpu, and dump the full mask in the exit message? Yes. Thanks. -- tejun