linux-kernel - Re: [PATCH] nvme-pci: calculate iod and avg_seg

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Message-ID: <20180111154857.GA2602@localhost.localdomain>
Date:   Thu, 11 Jan 2018 08:48:58 -0700
From:   Keith Busch <keith.busch@...el.com>
To:     Jianchao Wang <jianchao.w.wang@...cle.com>
Cc:     axboe@...com, hch@....de, sagi@...mberg.me,
        linux-nvme@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] nvme-pci: calculate iod and avg_seg_size just before use
 them

On Thu, Jan 11, 2018 at 01:09:39PM +0800, Jianchao Wang wrote:
> The calculation of iod and avg_seg_size maybe meaningless if
> nvme_pci_use_sgls returns before uses them. So calculate
> just before use them.

The compiler will do the right thing here, but I see what you mean. I
think Christoph has some SGL improvements coming, though, that will
obviate this.