Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 48C95C433EF for ; Thu, 25 Nov 2021 21:13:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1357200AbhKYVQv (ORCPT ); Thu, 25 Nov 2021 16:16:51 -0500 Received: from mailbackend.panix.com ([166.84.1.89]:32349 "EHLO mailbackend.panix.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1357070AbhKYVOv (ORCPT ); Thu, 25 Nov 2021 16:14:51 -0500 Received: from [192.168.126.80] (ip98-184-250-31.oc.oc.cox.net [98.184.250.31]) by mailbackend.panix.com (Postfix) with ESMTPSA id 4J0VtL06xBz2sbg; Thu, 25 Nov 2021 16:11:37 -0500 (EST) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=panix.com; s=panix; t=1637874698; bh=fVNYCI2o8Gl3FzZCspvrDjT0dqKVQsui7DbLR5TdBCE=; h=Date:From:Reply-To:To:cc:Subject:In-Reply-To:References; b=A7Ls6wj2XBnwsNg2MULnSOPdQxNiIvfc1TqbPbMJBwbHI04fPzby4HhYqHFjrwn/R tlAf210tFs5xMn9gdb7U85XN77OiXCbUp81PCx/xJKGLcJKyHQ+yeItR9LODMNn4np XmY3POWRNhMqhXfN5jYFiGWqm4aMNeqx6RPVRWcU= Date: Thu, 25 Nov 2021 13:11:36 -0800 (PST) From: "Kenneth R. Crudup" Reply-To: "Kenneth R. Crudup" To: Jens Axboe cc: linux-bcache@vger.kernel.org, linux-block@vger.kernel.org, linux-ext4@vger.kernel.org, linux-nvme@lists.infradead.org Subject: Re: Write I/O queue hangup at random on recent Linus' kernels In-Reply-To: <17206ea6-506d-b1de-09e8-c935ff308bd6@kernel.dk> Message-ID: <66abbccd-aff0-9b6d-5aa3-f0f17eb4b12f@panix.com> References: <17206ea6-506d-b1de-09e8-c935ff308bd6@kernel.dk> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Precedence: bulk List-ID: X-Mailing-List: linux-ext4@vger.kernel.org On Thu, 25 Nov 2021, Jens Axboe wrote: >>> echo 0 > /sys/block/nvme0n1/queue/wbt_lat_usec >> It's been about 48 hours and haven't seen the issue since doing this. > Great, thanks for verifying. From your report 5.16-rc2 has the issue, is > 5.15 fine? I can check that out sometime in the next few days, but IIRC I pretty sure the issue hadn't surfaced before the 3rd or 4th of November. I pull from master at least every 2-3 days, so there's at least a timeframe. -Kenny -- Kenneth R. Crudup / Sr. SW Engineer, Scott County Consulting, Orange County CA