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 EBBC8275AED for ; Mon, 23 Jun 2025 15:08:59 +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=1750691340; cv=none; b=LGulmk+coPJwl5MqcEyvSMqs8w28UuV4U+xDLox/q28CeKX2TcDDymygxEFEBiSNbb8p3n5jg684x6YpgM5cndMAmdd0/lYQY/XjKwSw1oR9YosNvejVlkueSlbC5FzysLSgLH7hrgJqhnPdF/7KLQUC+5pbmPsWuR8kyvByJjk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750691340; c=relaxed/simple; bh=WTLi4NhbtW53bfGC4bVmvYSJGLX6tkPNywywR7CkLZI=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=F03N/nhpAGSk9vf6Oj/CyYRwGWkDEqyen14xeIuX44LH6UGlIJjfG/53w1bFqRjViEneBF0BU8l28xC7B2X3t660fK5Q2iZGhjaKS1NSnZTdb+sdrwOjyMXrJdEVlOcVPan2JhLGVn107XuCT0fa840Bflff/vxfkh+OHqOdLZg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=BFEbk8Dh; 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="BFEbk8Dh" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 15C72C4CEEA; Mon, 23 Jun 2025 15:08:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1750691339; bh=WTLi4NhbtW53bfGC4bVmvYSJGLX6tkPNywywR7CkLZI=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=BFEbk8Dh933EADKYtIasH6y3lFw9CE4hU1GcJkYAUp5vO8Ij0PfW1+1qPzJ5JG36O iS0oKxQ+dsTZJIfOPTbqIg1O7hrul4pHDD6N59MN8T5W1x39d/OB82mqThauLk8SoI qG/mN+GqWB1F0lmv2FRXEGAJxxsqxAXw8dPUlD3xOaEFHmE2NuUAc0fbU7aBgWsUE5 GusNrEFubdBfPKUekVjlSUIngY6GH6LQL2IrGvR01icayjFT8TifvDJH29QDW74OcL +tK3F+SoXzkt6cEqqzzaRHJnMTz+3JeeP0/uJXf2kdBBkE5UUf1FzFsmP/OSoxdcpa d1qyH0Ju9GBaA== Date: Mon, 23 Jun 2025 09:08:57 -0600 From: Keith Busch To: Fengnan Chang Cc: axboe@kernel.dk, linux-block@vger.kernel.org Subject: Re: [RFC PATCH] block: Add a workaround for the miss wakeup problem Message-ID: References: <20250623111021.64094-1-changfengnan@bytedance.com> Precedence: bulk X-Mailing-List: linux-block@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: <20250623111021.64094-1-changfengnan@bytedance.com> On Mon, Jun 23, 2025 at 07:10:21PM +0800, Fengnan Chang wrote: > Some io hang problems are caused by miss wakeup, and these cases could Wait a second, what's the cause of the missed wakeup? I don't think that should ever happen, so let's get the details on that first.