linux-kernel - Re: [PATCH 0/3] Introduce a light-weight queue close feature

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Message-ID: <ebeffce9-4136-1b4d-1253-b5c045eff3f7@oracle.com>
Date:   Thu, 6 Sep 2018 09:35:09 +0800
From:   "jianchao.wang" <jianchao.w.wang@...cle.com>
To:     Bart Van Assche <bvanassche@....org>, axboe@...nel.dk,
        ming.lei@...hat.com, bart.vanassche@....com, sagi@...mberg.me,
        keith.busch@...el.com, jthumshirn@...e.de, jsmart2021@...il.com
Cc:     linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-nvme@...ts.infradead.org
Subject: Re: [PATCH 0/3] Introduce a light-weight queue close feature

Hi Bart

On 09/05/2018 11:48 PM, Bart Van Assche wrote:
>> The 3rd patch apply the queue close in nvme-pci to avoid the IO hang
>> issue above.
> Hello Jianchao,
> 
> Is this patch series based on a theoretical concern or rather on something
> you ran into? In the latter case, can you explain which scenario makes it
> likely on your setup to encounter an NVMe timeout?

It is a theoretical concern. But I think it is very obvious.
It could be very easy to reproduce if simulate IO timeout in software.

Thanks
Jianchao