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Message-ID: <5395BFF2.2080402@fb.com>
Date:	Mon, 9 Jun 2014 08:08:50 -0600
From:	Jens Axboe <axboe@...com>
To:	Ming Lei <tom.leiming@...il.com>,
	Matias Bjørling <m@...rling.me>
CC:	<willy@...ux.intel.com>, <keith.busch@...el.com>,
	<sbradshaw@...ron.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	<linux-nvme@...ts.infradead.org>
Subject: Re: [PATCH v6] NVMe: conversion to blk-mq

On 2014-06-08 22:35, Ming Lei wrote:
> On Fri, Jun 6, 2014 at 8:20 PM, Matias Bjørling <m@...rling.me> wrote:
>> This converts the current NVMe driver to utilize the blk-mq layer.
>
> Looks it can't be applied cleanly against 3.15-rc8 + Jens's for-linux
> branch, when I fix the conflict manually, below failure is triggered:
>
> [  487.696057] nvme 0000:00:07.0: Cancelling I/O 202 QID 1
> [  487.699005] nvme 0000:00:07.0: Aborting I/O 202 QID 1
> [  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:

http://git.kernel.dk/?p=linux-block.git;a=commit;h=f6be4fb4bcb396fc3b1c134b7863351972de081f


-- 
Jens Axboe

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