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 C03D5C433F5 for ; Thu, 2 Dec 2021 15:37:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241755AbhLBPkv (ORCPT ); Thu, 2 Dec 2021 10:40:51 -0500 Received: from mailbackend.panix.com ([166.84.1.89]:60364 "EHLO mailbackend.panix.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233165AbhLBPkv (ORCPT ); Thu, 2 Dec 2021 10:40:51 -0500 Received: from xps-7390.lan (50-233-66-25-static.hfc.comcastbusiness.net [50.233.66.25]) by mailbackend.panix.com (Postfix) with ESMTPSA id 4J4g7W0QqVz2jCv; Thu, 2 Dec 2021 10:37:26 -0500 (EST) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=panix.com; s=panix; t=1638459447; bh=dbKm0N0V3+vmx7loDcn20Anbh9JDyOpiRkOKnYCaoPo=; h=Date:From:Reply-To:To:cc:Subject:In-Reply-To:References; b=A7kKY5Je6s5F+dwDSFtlTMCWbUVWbq9JEsNVRFpg6ZFGq6fmQ1UUeLeXnMbRDBhsn BtdVL5OPgxJ0b3FT8zipfDsiS5pO5uhkVwXWUeevTkneiIemJaYBXpyzJ1kqRR0PI7 /e7O8ej/mv7oXZUrp+gru9VOcZ3QJYW+ge2XFneY= Date: Thu, 2 Dec 2021 07:37:26 -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, shinichiro.kawasaki@wdc.com Subject: Re: Write I/O queue hangup at random on recent Linus' kernels In-Reply-To: <4429eed8-b9b9-6943-f76-6ea38d695248@panix.com> Message-ID: References: <4429eed8-b9b9-6943-f76-6ea38d695248@panix.com> 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, 2 Dec 2021, Kenneth R. Crudup wrote: > $ egrep -r . $(sudo find /sys/block/*/ -name inflight ) > > ... but they were all zeros. ... and similarly: ---- $ sudo egrep -r . $(sudo find /sys/kernel/debug/block/ -name inflight) /sys/kernel/debug/block/mmcblk0/rqos/wbt/inflight:0: inflight 0 /sys/kernel/debug/block/mmcblk0/rqos/wbt/inflight:1: inflight 0 /sys/kernel/debug/block/mmcblk0/rqos/wbt/inflight:2: inflight 0 /sys/kernel/debug/block/sda/rqos/wbt/inflight:0: inflight 0 /sys/kernel/debug/block/sda/rqos/wbt/inflight:1: inflight 0 /sys/kernel/debug/block/sda/rqos/wbt/inflight:2: inflight 0 /sys/kernel/debug/block/nvme0n1/rqos/wbt/inflight:0: inflight 0 /sys/kernel/debug/block/nvme0n1/rqos/wbt/inflight:1: inflight 0 /sys/kernel/debug/block/nvme0n1/rqos/wbt/inflight:2: inflight 0 /sys/kernel/debug/block/loop7/rqos/wbt/inflight:0: inflight 0 /sys/kernel/debug/block/loop7/rqos/wbt/inflight:1: inflight 0 /sys/kernel/debug/block/loop7/rqos/wbt/inflight:2: inflight 0 /sys/kernel/debug/block/loop6/rqos/wbt/inflight:0: inflight 0 /sys/kernel/debug/block/loop6/rqos/wbt/inflight:1: inflight 0 /sys/kernel/debug/block/loop6/rqos/wbt/inflight:2: inflight 0 /sys/kernel/debug/block/loop5/rqos/wbt/inflight:0: inflight 0 /sys/kernel/debug/block/loop5/rqos/wbt/inflight:1: inflight 0 /sys/kernel/debug/block/loop5/rqos/wbt/inflight:2: inflight 0 /sys/kernel/debug/block/loop4/rqos/wbt/inflight:0: inflight 0 /sys/kernel/debug/block/loop4/rqos/wbt/inflight:1: inflight 0 /sys/kernel/debug/block/loop4/rqos/wbt/inflight:2: inflight 0 /sys/kernel/debug/block/loop3/rqos/wbt/inflight:0: inflight 0 /sys/kernel/debug/block/loop3/rqos/wbt/inflight:1: inflight 0 /sys/kernel/debug/block/loop3/rqos/wbt/inflight:2: inflight 0 /sys/kernel/debug/block/loop2/rqos/wbt/inflight:0: inflight 0 /sys/kernel/debug/block/loop2/rqos/wbt/inflight:1: inflight 0 /sys/kernel/debug/block/loop2/rqos/wbt/inflight:2: inflight 0 /sys/kernel/debug/block/loop1/rqos/wbt/inflight:0: inflight 0 /sys/kernel/debug/block/loop1/rqos/wbt/inflight:1: inflight 0 /sys/kernel/debug/block/loop1/rqos/wbt/inflight:2: inflight 0 /sys/kernel/debug/block/loop0/rqos/wbt/inflight:0: inflight 0 /sys/kernel/debug/block/loop0/rqos/wbt/inflight:1: inflight 0 /sys/kernel/debug/block/loop0/rqos/wbt/inflight:2: inflight 0 ---- (... but just now, I got a delayed popup from my UI, which then went back to being unresponsive again) -Kenny -- Kenneth R. Crudup / Sr. SW Engineer, Scott County Consulting, Orange County CA