linux-kernel - Re: [PATCH] SCSI: delay run queue if device is blocked in scsi_dev_queue

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Message-ID: <1512427794.2795.15.camel@wdc.com>
Date:   Mon, 4 Dec 2017 22:49:55 +0000
From:   Bart Van Assche <Bart.VanAssche@....com>
To:     "ming.lei@...hat.com" <ming.lei@...hat.com>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-block@...r.kernel.org" <linux-block@...r.kernel.org>,
        "hch@...radead.org" <hch@...radead.org>,
        "martin.petersen@...cle.com" <martin.petersen@...cle.com>,
        "linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>,
        "axboe@...com" <axboe@...com>, "hare@...e.com" <hare@...e.com>,
        "jejb@...ux.vnet.ibm.com" <jejb@...ux.vnet.ibm.com>
Subject: Re: [PATCH] SCSI: delay run queue if device is blocked in
 scsi_dev_queue_ready()

On Tue, 2017-12-05 at 06:45 +0800, Ming Lei wrote:
> On Mon, Dec 04, 2017 at 03:09:20PM +0000, Bart Van Assche wrote:
> > On Sun, 2017-12-03 at 00:31 +0800, Ming Lei wrote:
> > > Fixes: 0df21c86bdbf ("scsi: implement .get_budget and .put_budget for blk-mq")
> > 
> > It might be safer to revert commit 0df21c86bdbf instead of trying to fix all
> > issues introduced by that commit for kernel version v4.15 ...
> 
> What are all issues in v4.15-rc? Up to now, it is the only issue reported,
> and can be fixed by this simple patch, which one can be thought as cleanup
> too.

The three issues I described in the commit message of the patch that is available at:
https://marc.info/?l=linux-block&m=151240866010572.

Bart.