From: Keith Busch <kbusch@kernel.org>
To: Christoph Hellwig <hch@lst.de>
Cc: linux-nvme@lists.infradead.org, linux-block@vger.kernel.org,
axboe@kernel.dk, sagi@grimberg.me
Subject: Re: [PATCHv2 3/3] nvme-pci: fix queue_rqs list splitting
Date: Wed, 29 Dec 2021 13:04:46 -0800 [thread overview]
Message-ID: <20211229210446.GC2493133@dhcp-10-100-145-180.wdc.com> (raw)
In-Reply-To: <20211229174602.GC28058@lst.de>
On Wed, Dec 29, 2021 at 06:46:02PM +0100, Christoph Hellwig wrote:
> > + rq_list_move(rqlist, &requeue_list, req, prev, next);
> > +
> > + req = prev;
> > + if (!req)
> > + continue;
>
> Shouldn't this be a break?
The condition just means we're at the beginning of the rqlist. There may
be more requests to consider, so we have to continue.
Or are you saying any failed prep should just abandon the batched
sequence? If so, we would need to concat the return list with the rest
of rqlist before breaking.
> > + *rqlist = next;
> > + prev = NULL;
> > + } else
> > + prev = req;
> > + }
>
> I wonder if a restart label here would be a little cleaner, something
> like:
I applied your suggestion to give it a look, and I agree. Will use that
for the next version.
next prev parent reply other threads:[~2021-12-29 21:04 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-27 16:41 [PATCHv2 1/3] block: introduce rq_list_for_each_safe macro Keith Busch
2021-12-27 16:41 ` [PATCHv2 2/3] block: introduce rq_list_move Keith Busch
2021-12-27 18:49 ` kernel test robot
2021-12-27 18:49 ` kernel test robot
2021-12-29 17:41 ` Christoph Hellwig
2021-12-29 20:59 ` Keith Busch
2021-12-27 16:41 ` [PATCHv2 3/3] nvme-pci: fix queue_rqs list splitting Keith Busch
2021-12-29 17:46 ` Christoph Hellwig
2021-12-29 21:04 ` Keith Busch [this message]
2021-12-30 7:53 ` Christoph Hellwig
2022-01-04 19:38 ` Keith Busch
2022-01-05 7:35 ` Christoph Hellwig
2021-12-29 17:39 ` [PATCHv2 1/3] block: introduce rq_list_for_each_safe macro Christoph Hellwig
2021-12-29 20:57 ` Keith Busch
2021-12-30 14:38 ` Max Gurtovoy
2021-12-30 15:30 ` Keith Busch
2022-01-03 15:23 ` Max Gurtovoy
2022-01-03 18:15 ` Keith Busch
2022-01-04 12:15 ` Max Gurtovoy
2022-01-05 17:26 ` Keith Busch
2022-01-06 11:54 ` Max Gurtovoy
2022-01-06 13:41 ` Jens Axboe
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