linux-kernel - Re: [RFC PATCH] blk-mq: fixup RESTART when queue becomes idle

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Message-ID: <1516338585.4077.1.camel@wdc.com>
Date:   Fri, 19 Jan 2018 05:09:46 +0000
From:   Bart Van Assche <Bart.VanAssche@....com>
To:     "ming.lei@...hat.com" <ming.lei@...hat.com>,
        "axboe@...nel.dk" <axboe@...nel.dk>
CC:     "dm-devel@...hat.com" <dm-devel@...hat.com>,
        "hch@...radead.org" <hch@...radead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-block@...r.kernel.org" <linux-block@...r.kernel.org>,
        "osandov@...com" <osandov@...com>,
        "snitzer@...hat.com" <snitzer@...hat.com>
Subject: Re: [RFC PATCH] blk-mq: fixup RESTART when queue becomes idle

On Fri, 2018-01-19 at 10:32 +0800, Ming Lei wrote:
> Now most of times both NVMe and SCSI won't return BLK_STS_RESOURCE, and
> it should be DM-only which returns STS_RESOURCE so often.

That's wrong at least for SCSI. See also https://marc.info/?l=linux-block&m=151578329417076.

Bart.