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 0F1C5C433FE for ; Fri, 26 Nov 2021 18:00:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238271AbhKZSDj (ORCPT ); Fri, 26 Nov 2021 13:03:39 -0500 Received: from mailbackend.panix.com ([166.84.1.89]:54991 "EHLO mailbackend.panix.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239453AbhKZSBj (ORCPT ); Fri, 26 Nov 2021 13:01:39 -0500 Received: from xps-7390.local (ip98-184-250-31.oc.oc.cox.net [98.184.250.31]) by mailbackend.panix.com (Postfix) with ESMTPSA id 4J12Xq2bzPz2wQp; Fri, 26 Nov 2021 12:58:19 -0500 (EST) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=panix.com; s=panix; t=1637949500; bh=IGNkEdY/1fSW0p0DFCKX6RcLSqM6E0d4vaFMfumBmtw=; h=Date:From:Reply-To:To:cc:Subject:In-Reply-To:References; b=YS+84g8rKkhBrdTRSchw7CEu/65NpFZwQCMztRP/04D0Apb6Xp0npukJWqyz9R1Z7 rW5b0GQwPHYDq7mpnV0Gr1f1bVORwnXwhqR2KlLHYOcK+SFQhb/IHOsjgiwH+ttD/g q9x4CC/s3UZSA1zOBnR8fHzcnH9rL42Pxjo+3sRs= Date: Fri, 26 Nov 2021 09:58:18 -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 , "Kenneth R. Crudup" Subject: Re: Write I/O queue hangup at random on recent Linus' kernels In-Reply-To: <903be817-4118-f34e-1b35-a0108045590f@kernel.dk> Message-ID: <986e942b-d430-783b-5b1c-4525d4a94e48@panix.com> References: <17206ea6-506d-b1de-09e8-c935ff308bd6@kernel.dk> <903be817-4118-f34e-1b35-a0108045590f@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 Fri, 26 Nov 2021, Jens Axboe wrote: > Can you apply this on top of 5.16-rc2 or current -git and see if it fixes > it for you? Since it's related to writeback throttling, is there anything I can try to taunt it? I was thinking "iozone" or "bonnie++", but if there's something better, let me know. -Kenny -- Kenneth R. Crudup / Sr. SW Engineer, Scott County Consulting, Orange County CA