From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 77F81C433B4 for ; Fri, 21 May 2021 08:36:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4DB36613AC for ; Fri, 21 May 2021 08:36:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232711AbhEUIiA (ORCPT ); Fri, 21 May 2021 04:38:00 -0400 Received: from verein.lst.de ([213.95.11.211]:46990 "EHLO verein.lst.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229581AbhEUIiA (ORCPT ); Fri, 21 May 2021 04:38:00 -0400 Received: by verein.lst.de (Postfix, from userid 2407) id 2E24C6736F; Fri, 21 May 2021 10:36:35 +0200 (CEST) Date: Fri, 21 May 2021 10:36:35 +0200 From: Christoph Hellwig To: Ming Lei Cc: Christoph Hellwig , Brian Foster , "Darrick J. Wong" , Dave Chinner , linux-block@vger.kernel.org, linux-fsdevel@vger.kernel.org Subject: Re: iomap: writeback ioend/bio allocation deadlock risk Message-ID: <20210521083635.GA15311@lst.de> References: <20210521071727.GA11473@lst.de> <20210521073547.GA11955@lst.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.17 (2007-11-01) Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org On Fri, May 21, 2021 at 04:35:03PM +0800, Ming Lei wrote: > Just wondering why the ioend isn't submitted out after it becomes full? block layer plugging? Although failing bio allocations will kick that, so that is not a deadlock risk.