[PATCH v6] NVMe: conversion to blk-mq

[Jens Axboe]

On 2014-06-08 22:35, Ming Lei wrote:
> On Fri, Jun 6, 2014 at 8:20 PM, Matias Bjørling <m at bjorling.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