linux-kernel - Re: [PATCH] nvmet: Reorder fields in 'struct nvmet

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Message-ID: <ba5df67e-534d-6f79-6277-80c755ca7e94@nvidia.com>
Date:   Thu, 27 Apr 2023 22:59:26 +0000
From:   Chaitanya Kulkarni <chaitanyak@...dia.com>
To:     Christophe JAILLET <christophe.jaillet@...adoo.fr>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Sagi Grimberg <sagi@...mberg.me>,
        Christoph Hellwig <hch@....de>,
        "kernel-janitors@...r.kernel.org" <kernel-janitors@...r.kernel.org>,
        "linux-nvme@...ts.infradead.org" <linux-nvme@...ts.infradead.org>,
        Chaitanya Kulkarni <chaitanyak@...dia.com>
Subject: Re: [PATCH] nvmet: Reorder fields in 'struct nvmet_ns'

On 4/27/23 12:47, Christophe JAILLET wrote:
> Group some variables based on their sizes to reduce holes.
> On x86_64, this shrinks the size of 'struct nvmet_ns' from 520 to 512
> bytes.
>

Although this looks good, we at least need to document what
happens on other arch(s) which are not mentioned in the
commit log ? is there a possibility that someone might come
up with the contradictory data in future for the arch(s) which
arch that are not mentioned here ?

-ck