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 783E628E3F; Thu, 2 Jan 2025 09:49:47 +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=1735811387; cv=none; b=EN0QmiDhdwW5F3fejKgTkNB67W2KzqddZNaMEdQB7S2FX2BVBhN1EC3pTt1OvqSTDHsrRwEo1KDEEyRQU8ha4OKC1tgM+36sxqncUwT32QhVIrTYbflaHbFAMy8qBVKP1X2nTPN8YRj2+1rRH/v+/EFcO7wSEd/KQb4aJaRHFHY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1735811387; c=relaxed/simple; bh=tXfAAU26K170fcnqh0owN8PXAjsnMTBCFumiGjaOeBg=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=qqpbtACp+SFyDlStRog/3fF/TESpqgR6+NUs4uVvZGi5M7M+LwEjzHUom+WQj5j9s5oynOL7Y3Svida0l04dGx4LspDHjlenSI9S34b4KdHkFtc2Q8HzajnLe1Sw4LxQ/PD2umxVdE1TzXO6GcbP76EIbJw/jBY2NsCBsgDEByU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=jymOAf3D; 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="jymOAf3D" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B2992C4CED6; Thu, 2 Jan 2025 09:49:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1735811387; bh=tXfAAU26K170fcnqh0owN8PXAjsnMTBCFumiGjaOeBg=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=jymOAf3D7m3mfa7J4H+4AdQp8u9ITBFukQZjQSGCcf1jCIi+tFh8LUPsn93CKUekn ZV+A3NPZPdfCraH+d/Df8654DTUCWxocnkDuxolncQhl6spIpsAgKyCU6S0/vd+FPo fM+UTBqmZag9Re3Wm509djGWaeGHZGqbHDI/1lMV9dUloHcwcZM5hZ/2pBOCyoPbXD a2QgPtWadwW1B1HFWk37zRFS8bWsstfnpydiYRy7k+2ZSi/vyfWAqp/uu7C3tJlkfG djL+YkI4j1sLsY3lz31p9rzKQ8EhaRP45bHWa57AUvECyfDSI0mBWdfkYR4gBscK2p i06VwGFRO/JNg== Date: Thu, 2 Jan 2025 10:49:41 +0100 From: Niklas Cassel To: Christoph Hellwig Cc: Oliver Sang , oe-lkp@lists.linux.dev, lkp@intel.com, linux-kernel@vger.kernel.org, Jens Axboe , linux-block@vger.kernel.org, virtualization@lists.linux.dev, linux-nvme@lists.infradead.org, Damien Le Moal Subject: Re: [linus:master] [block] e70c301fae: stress-ng.aiol.ops_per_sec 49.6% regression Message-ID: References: <202412122112.ca47bcec-lkp@intel.com> <20241213143224.GA16111@lst.de> <20241217045527.GA16091@lst.de> <20241217065614.GA19113@lst.de> 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: <20241217065614.GA19113@lst.de> Hello Oliver, Christoph, On Tue, Dec 17, 2024 at 07:56:14AM +0100, Christoph Hellwig wrote: > On Tue, Dec 17, 2024 at 02:55:23PM +0800, Oliver Sang wrote: > > from below information, it seems an 'ahci' to me. but since I have limited > > knowledge about storage driver, maybe I'm wrong. if you want more information, > > please let us know. thanks a lot! > > Yes, this looks like ahci. Thanks a lot! Did this ever get resolved? I haven't seen a patch that seems to address this. AHCI (ata_scsi_queuecmd()) only issues a single command, so if there is any reordering when issuing a batch of commands, my guess is that the problem also affects SCSI / the problem is in upper layers above AHCI, i.e. SCSI lib or block layer. Kind regards, Niklas