From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx3-rdu2.redhat.com ([66.187.233.73]:37504 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751492AbeBWQ0n (ORCPT ); Fri, 23 Feb 2018 11:26:43 -0500 Date: Sat, 24 Feb 2018 00:26:27 +0800 From: Ming Lei To: Bart Van Assche Cc: "osandov@osandov.com" , "linux-block@vger.kernel.org" Subject: Re: v4.16-rc2: I/O hang with dm-rq + Kyber Message-ID: <20180223162626.GB17466@ming.t460p> References: <1519333819.2861.17.camel@wdc.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii In-Reply-To: <1519333819.2861.17.camel@wdc.com> Sender: linux-block-owner@vger.kernel.org List-Id: linux-block@vger.kernel.org On Thu, Feb 22, 2018 at 09:10:23PM +0000, Bart Van Assche wrote: > Hello Omar, > > I/O hangs if I run the following command on top of kernel v4.16-rc2 + the > ib_srpt patch that adds RDMA/CM support: > > srp-test/run_tests -c -d -r 10 -t 02-mq -e kyber > > This does not happen with the deadline scheduler nor without a scheduler. > This test passed a few months ago. I have attached the output of the following > command to this e-mail: > > (cd /sys/kernel/debug/block && grep -r .) | grep -v /poll_stat > > Can you have a look? The following 2 patch fixes one IO hang on kyber in my test on USB, could you test it and see if your case can be fixed? https://marc.info/?l=linux-block&m=151940022831994&w=2 BTW, from your attached log, looks it belongs to domain token leak issue too, so it should have been addressed by above patches. Thanks, Ming