linux-kernel - Re: [PATCH 1/2] scsi: Move scsi_cmd->jiffies_at

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Message-ID: <20170822065104.GA7054@lst.de>
Date:   Tue, 22 Aug 2017 08:51:04 +0200
From:   "hch@....de" <hch@....de>
To:     Brian King <brking@...ux.vnet.ibm.com>
Cc:     Bart Van Assche <Bart.VanAssche@....com>,
        "linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>,
        "abdhalee@...ux.vnet.ibm.com" <abdhalee@...ux.vnet.ibm.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "hch@....de" <hch@....de>,
        "linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>,
        "sfr@...b.auug.org.au" <sfr@...b.auug.org.au>,
        "sachinp@...ux.vnet.ibm.com" <sachinp@...ux.vnet.ibm.com>,
        "linux-next@...r.kernel.org" <linux-next@...r.kernel.org>,
        "hare@...e.com" <hare@...e.com>,
        "mpe@...erman.id.au" <mpe@...erman.id.au>
Subject: Re: [PATCH 1/2] scsi: Move scsi_cmd->jiffies_at_alloc
        initialization to allocation time

On Mon, Aug 21, 2017 at 05:13:20PM -0500, Brian King wrote:
> Move the initialization of scsi_cmd->jiffies_at_alloc to allocation
> time rather than prep time. Also ensure that jiffies_at_alloc
> is preserved when we go through prep. This lets us send retries
> through prep again and not break the overall retry timer logic
> in scsi_softirq_done.
> 
> Suggested-by: Bart Van Assche <Bart.VanAssche@....com>
> Signed-off-by: Brian King <brking@...ux.vnet.ibm.com>

As far as I can tell this will never set jiffies_at_alloc for the
blk-mq path.