From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pl1-f181.google.com (mail-pl1-f181.google.com [209.85.214.181]) (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 0392620127D for ; Wed, 11 Jun 2025 19:08:16 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.181 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1749668898; cv=none; b=fsL5DLHE9Ql2Zc628Oi05/ZdAWvtHXKd2kqI6BMzIJqZ8XOz2joSiQCXuZn/uMAcCZFsbXWiqHLSEDsdG4M1/lZK5RX6o9eMkfzylB30KMu3+arEs+xYVyBFfF5gBqwbYZpl8rumGjs2yfwKlAOHKCrkVqHwEBViHAPPLNZx6Lo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1749668898; c=relaxed/simple; bh=Qb+rw+/+v6vkARv8Ptja+GP0pY6S9kxgJsfkBLogMiw=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=kE7xyPX9mTlZWkPGJs1dCH/2fb0jt0dbx/eKKPwRCQkMw5k9KlueLx0nggwhvvnSFiryc9b1BY+UDBNt0uhYDhkpeZJPXfNYLSAAtSMMj3kPrlgFleRJRq4LM+c3GHwo81kTr6vFconHiot0L6BkHvC9bD6L64KcovV0wc+nUms= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=chromium.org; spf=pass smtp.mailfrom=chromium.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b=f2c/JIY1; arc=none smtp.client-ip=209.85.214.181 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=chromium.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=chromium.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="f2c/JIY1" Received: by mail-pl1-f181.google.com with SMTP id d9443c01a7336-235e1d4cba0so1557655ad.2 for ; Wed, 11 Jun 2025 12:08:16 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; t=1749668896; x=1750273696; darn=vger.kernel.org; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:from:to:cc:subject:date:message-id:reply-to; bh=d5WV78r9hsFDa0FOY/UalZ2/FYtYwT6NjQmp0SNoQZk=; b=f2c/JIY1bUKRNFZhWb23QqqnxPQsexIZYsD/t4In9f3109cbn1JifIwZNxAjrB0eyI maiiCbpWyBwHe6U268zUMuXNeScAh/HQAsrp3LcBmvSHAQ9eGCaltgBTM7//Nf1B3vA2 U7KPkUWAboFVLav+9Ajp80F4vWnwyvIcOqFfc= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1749668896; x=1750273696; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=d5WV78r9hsFDa0FOY/UalZ2/FYtYwT6NjQmp0SNoQZk=; b=u1NaNutIldk9Ojf8vXmXwFd3VZZoqnp9Yk9rvyyZoyJjAdXF5F4ZKE0lg17KMK+gob pe6uWgWGDFZIgSUYtjMrR0lUrSudUH68cqnA4puQJXYJDIbOgpr45N1kZcCurocJwLmq erWZJazuOoJWsj+3CeBVeR3pbPA22GHY/NwkXELK/y8G6A8qmbu3kC9mbHTrj0Ss7U4t 8zK/LS43ikfpPSrCrWnvpPhcqhKPSW7Vz2kLGU3W2HXl+S9/ArHaAJqT3eaV/Cu2QYZ8 sT1zTifyOlsSaHe8t+xtFsVG44Ov6+yULRyfIc2jjBHTaq2fK29b7le58PAQN79JFdlU XcUA== X-Forwarded-Encrypted: i=1; AJvYcCVrcEvT3NyMniInWP31INuG8/S+qbZTnokjUFeo0i9ThFRKR/d/1GkNxxr+vauePEbNyUa6bV3Do/RCFGY=@vger.kernel.org X-Gm-Message-State: AOJu0YzpSk4VNNYXYFcqofPBwrQFjaxSnKn31yeJ4NNHLhmQm07H8PgG 455qBXhbYSBtwVGx5gK7FiBHhI88blXOQOwfRSqIrcBZDNMF4OEoIhkJgxepbngYKA== X-Gm-Gg: ASbGnctt6KBG52PKqPyvIakKfYWMnbnZiRty/SsiyUs8qiOOdqcYdF2x1FpZR4CyyMT BFmQLF7MbZlchV7/3pWFFsyIx0GP8iZH7R2li2RSumKGkb3Cit1wAbcXUzNROZh8iry3za8A3BA V1fjb2qnQkutSa9GgoRZMPOCCiBTfvD7K99yxQIUxOYS9zDp6pGYU/1WS5QLO150Sl0nG1yMPap 8bBeNePjtjapTizsI3qUR8H7Sz8N4hzkjmyyt4V0AnUFiQI+HEOLOPGNjbfb1lZbRTDA54zHCam Ew1iTWI1nECIo2C1UbiCRFBteaPHv1XAIXyzz8L3AYYh6/1wAHc/hTzTpYEZOVXzD3mAPXqdhp1 A7lAFUnlvU5LLv/ugPtABTQo5 X-Google-Smtp-Source: AGHT+IGUdxhmprcVIjSuN4yZNd+FHL+5/zfrk/Oy7uV844JlySkH+ZJtP4VdG03ApE+R0C4tAE7OvA== X-Received: by 2002:a17:902:cec3:b0:234:8c64:7875 with SMTP id d9443c01a7336-2364d8cc697mr3722255ad.38.1749668896237; Wed, 11 Jun 2025 12:08:16 -0700 (PDT) Received: from localhost ([2a00:79e0:2e14:7:4ad1:78dc:7f25:dde3]) by smtp.gmail.com with UTF8SMTPSA id d9443c01a7336-236035068ddsm90940625ad.237.2025.06.11.12.08.15 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 11 Jun 2025 12:08:15 -0700 (PDT) Date: Wed, 11 Jun 2025 12:08:14 -0700 From: Brian Norris To: Aleksandrs Vinarskis Cc: Thomas Gleixner , Tsai Sung-Fu , Douglas Anderson , linux-kernel@vger.kernel.org, Johan Hovold Subject: Re: [PATCH v2 1/2] genirq: Retain depth for managed IRQs across CPU hotplug Message-ID: References: <20250514201353.3481400-1-briannorris@chromium.org> <20250514201353.3481400-2-briannorris@chromium.org> <24ec4adc-7c80-49e9-93ee-19908a97ab84@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@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: Hi Alex, On Wed, Jun 11, 2025 at 08:56:40AM +0200, Aleksandrs Vinarskis wrote: > Yes. Dell XPS 9345 is arch/arm64/boot/dts/qcom/x1e80100.dtsi based, > and Asus Zenbook A14 is arch/arm64/boot/dts/qcom/x1p42100.dtsi based, > which is a derivative but has a slightly different PCIe setup. So far > both laptops would behave in the same ways. Thanks. So that's what I suspected, a DWC/pcie-qcom PCIe driver, and seemingly standard NVMe on top. pcie-qcom doesn't seem to do anything weird regarding MSIs or affinity, so I wonder why I can't reproduce the same symptoms on other NVMe setups so far. I can see some of the NVMe queue MSIs left disabled (queue 0 / CPU 0 doesn't hit the same bugs, since we don't hotplug CPU 0), but operations seem to function OK even when missing a few queues. Maybe that's an implementation-specific behavior that exhibits differently depending on the exact disk in question. Anyway, I think we've probably honed in on the bugs, so this might just be a curiosity. > > Thanks for the testing. I've found a few problems with my proposed > > patch, and I've come up with the appended alternative that solves them. > > Could you give it a try? > > Just tested, and it appears to solve it, though I see some errors on > wakeup that I don't remember seeing before. I will test-drive this > setup for a day to provide better feedback and confirm if it is > related to the fixup or not. That's promising, I think. Do feel free to forward info if you think there's still a problem though. I'll await your feedback before spinning patches. Brian