Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933501AbaFIPfE (ORCPT ); Mon, 9 Jun 2014 11:35:04 -0400 Received: from mail-ve0-f169.google.com ([209.85.128.169]:45154 "EHLO mail-ve0-f169.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752169AbaFIPfB convert rfc822-to-8bit (ORCPT ); Mon, 9 Jun 2014 11:35:01 -0400 MIME-Version: 1.0 In-Reply-To: <5395D24D.9000306@fb.com> References: <1402057225-7312-1-git-send-email-m@bjorling.me> <1402057225-7312-2-git-send-email-m@bjorling.me> <5395BFF2.2080402@fb.com> <20140609145944.GA30626@infradead.org> <5395D24D.9000306@fb.com> Date: Mon, 9 Jun 2014 23:35:00 +0800 Message-ID: Subject: Re: [PATCH v6] NVMe: conversion to blk-mq From: Ming Lei To: Jens Axboe Cc: Christoph Hellwig , "Matias Bj??rling" , Matthew Wilcox , Keith Busch , "Sam Bradshaw (sbradshaw)" , Linux Kernel Mailing List , linux-nvme Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Jun 9, 2014 at 11:27 PM, Jens Axboe wrote: > On 2014-06-09 08:59, Christoph Hellwig wrote: >> >> On Mon, Jun 09, 2014 at 08:08:50AM -0600, Jens Axboe wrote: >>>> >>>> [ 487.704074] nvme 0000:00:07.0: Cancelling I/O 202 QID 1 >>>> [ 487.717881] nvme 0000:00:07.0: Aborting I/O 202 QID 1 >>>> [ 487.736093] end_request: I/O error, dev nvme0n1, sector 91532352 >>>> [ 487.747378] nvme 0000:00:07.0: completed id 0 twice on queue 0 >>>> >>>> >>>> when running fio randread(libaio, iodepth:64) with more than 3 jobs. >>>> >>>> And looks no such failure when jobs is 1 or 2. >>> >>> >>> It's a known issue, make sure you have this patch: >>> >>> >>> https://urldefense.proofpoint.com/v1/url?u=http://git.kernel.dk/?p%3Dlinux-block.git%3Ba%3Dcommit%3Bh%3Df6be4fb4bcb396fc3b1c134b7863351972de081f&k=ZVNjlDMF0FElm4dQtryO4A%3D%3D%0A&r=3JMVyziIyZtZ5cv9eWNLwQ%3D%3D%0A&m=MKK7A%2B9AnXXwtMV9YPSFEprXId0z0WLtd2JQPxnaNVc%3D%0A&s=45425e5d17390ae912457035ff081b95a7084725706ffe91166a1bdb25d8bf3d >> >> >> So without this patch we can get duplicate completions? That could >> explain the issues that Robert sees with scsi-mq and hpsa.. Use-after-free may cause duplicate completions. BTW, is the scsi-mq patchset public now? Thanks, -- Ming Lei -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/