linux-kernel - Re: [PATCH V7 0/6] block/scsi: safe SCSI quiescing

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Date:   Sat, 30 Sep 2017 17:51:58 +0800
From:   Ming Lei <ming.lei@...hat.com>
To:     Martin Steigerwald <martin@...htvoll.de>
Cc:     Jens Axboe <axboe@...com>, linux-block@...r.kernel.org,
        Christoph Hellwig <hch@...radead.org>,
        linux-scsi@...r.kernel.org,
        "Martin K . Petersen" <martin.petersen@...cle.com>,
        "James E . J . Bottomley" <jejb@...ux.vnet.ibm.com>,
        Bart Van Assche <bart.vanassche@...disk.com>,
        Oleksandr Natalenko <oleksandr@...alenko.name>,
        Johannes Thumshirn <jthumshirn@...e.de>,
        Cathy Avery <cavery@...hat.com>, linux-kernel@...r.kernel.org,
        Hannes Reinecke <hare@...e.com>
Subject: Re: [PATCH V7 0/6] block/scsi: safe SCSI quiescing

Hi Martin,

On Sat, Sep 30, 2017 at 11:47:10AM +0200, Martin Steigerwald wrote:
> Hi Ming.
> 
> Ming Lei - 30.09.17, 14:12:
> > Please consider this patchset for V4.15, and it fixes one
> > kind of long-term I/O hang issue in either block legacy path
> > or blk-mq.
> >
> > The current SCSI quiesce isn't safe and easy to trigger I/O deadlock.
> 
> Isn´t that material for -stable as well?

Yeah, the patch 6 is CCed to -stable.

> 
> I´d love to see this go into 4.14. Especially as its an LTS release.

I am fine with either 4.14 or 4.15, and it is up to Jens.

Thanks
Ming