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 4875C1A314A; Thu, 1 May 2025 17:00:35 +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=1746118836; cv=none; b=fxi0Gpp7pKuIajAFZulh4KPvNLPIeox6NPHtqTdTtYXyKXKvQixMKZ83vUa0Nun+aVgelquMMcyR8xJXjec2f4a1yHXfrwOD+reLheAkxLHAoie2z295AE404LiuPK5mQP/YJbUOhnobGNTigXhm+s0nXvdP1Lr6b/fdatCOxFo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746118836; c=relaxed/simple; bh=OMA0eH9KcaDe8ZVYZIdJjVrB3QO1xkNDa2/W/DkYQIU=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=h7iBSNx+JeT10pA7QiSnCABNjnUUeVnb/sR8wfZJowIjx1wsWHYYE/DOXGb84fDPXqQBYn3xX6RpiulcRUoPmJ597YuH+1jOXV4KUXtG8Y7IVhDXkSUyV79otUNxSeIcPL1S4FzdMN5yT3nZdv/EOIXVfdFYWT5ir6KQY+G2qjY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=MXGls3im; 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="MXGls3im" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9F2FDC4CEE3; Thu, 1 May 2025 17:00:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1746118835; bh=OMA0eH9KcaDe8ZVYZIdJjVrB3QO1xkNDa2/W/DkYQIU=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=MXGls3imxlHtKUicGqPwKOtx3jWz3zlkNesvyfv182mdRSnPL/GPWqLV98OVLz+Z6 E6jQ3Mkjed131tNt3+uFlw0YT3BAhw6e1jUmwKOOpI4UySFbBBY5RbYXFLv3Rzc17f zfIzAsvJiMp5nw/LzC1TnUZFGqO6iIZnYeOHsR7yQaNeu5He2C22G6V9eewzZlnaWr fgX9h1CR763aQqU0R1gTSGAotfnnwDvo7xi3CXBJi84wnAVAKrXXJt7GHO22rUSAEQ cvcNTxEZCaanvFI4Mb6gLWh1F7NrS4kGCzX/Te+j99e+SgMwrzZJ7E0h3fTF82E9PQ JoR6hyhzV2LiQ== Date: Thu, 1 May 2025 07:00:34 -1000 From: Tejun Heo To: Nilay Shroff Cc: Jakub Kicinski , Jens Axboe , cgroups@vger.kernel.org, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, Christoph Hellwig , Ming Lei Subject: Re: [RESEND] Circular locking dependency involving, elevator_lock, rq_qos_mutex and pcpu_alloc_mutex Message-ID: References: <16ed195d-7f26-41bb-86d6-ea961b3fa691@linux.ibm.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: <16ed195d-7f26-41bb-86d6-ea961b3fa691@linux.ibm.com> Hello, On Tue, Apr 08, 2025 at 12:32:50PM +0530, Nilay Shroff wrote: > Thanks for the report! This is now a known issue. And we're currently working on > it to cut dependency of q->io_lockdep_map (or queue freeze-lock) on q->elevator_lock. > Please see below :https://lore.kernel.org/linux-block/67e6b425.050a0220.2f068f.007b.GAE@google.com/ > https://lore.kernel.org/all/20250403105402.1334206-1-ming.lei@redhat.com/ Any progress on this? The last activity on the threads seems to be back on Apr 10th and we're getting close to rc5. If we need to revert, I think it's about time to decide. Thanks. -- tejun