linux-kernel - Re: [PATCH v15 12/12] null_blk: add support for copy offload

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Message-ID: <7bdf32f4-6fac-4ed4-a11f-b6dfe1c45177@suse.de>
Date:   Fri, 8 Sep 2023 08:16:39 +0200
From:   Hannes Reinecke <hare@...e.de>
To:     Nitesh Shetty <nj.shetty@...sung.com>,
        Jens Axboe <axboe@...nel.dk>, Jonathan Corbet <corbet@....net>,
        Alasdair Kergon <agk@...hat.com>,
        Mike Snitzer <snitzer@...nel.org>, dm-devel@...hat.com,
        Keith Busch <kbusch@...nel.org>,
        Christoph Hellwig <hch@....de>,
        Sagi Grimberg <sagi@...mberg.me>,
        Chaitanya Kulkarni <kch@...dia.com>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Christian Brauner <brauner@...nel.org>
Cc:     martin.petersen@...cle.com, mcgrof@...nel.org,
        gost.dev@...sung.com,
        Damien Le Moal <damien.lemoal@...nsource.wdc.com>,
        Anuj Gupta <anuj20.g@...sung.com>,
        Vincent Fu <vincent.fu@...sung.com>,
        linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-doc@...r.kernel.org, linux-nvme@...ts.infradead.org,
        linux-fsdevel@...r.kernel.org
Subject: Re: [PATCH v15 12/12] null_blk: add support for copy offload

On 9/6/23 18:38, Nitesh Shetty wrote:
> Implementation is based on existing read and write infrastructure.
> copy_max_bytes: A new configfs and module parameter is introduced, which
> can be used to set hardware/driver supported maximum copy limit.
> Only request based queue mode will support for copy offload.
> Added tracefs support to copy IO tracing.
> 
> Suggested-by: Damien Le Moal <damien.lemoal@...nsource.wdc.com>
> Signed-off-by: Anuj Gupta <anuj20.g@...sung.com>
> Signed-off-by: Nitesh Shetty <nj.shetty@...sung.com>
> Signed-off-by: Vincent Fu <vincent.fu@...sung.com>
> ---
>   Documentation/block/null_blk.rst  |  5 ++
>   drivers/block/null_blk/main.c     | 97 ++++++++++++++++++++++++++++++-
>   drivers/block/null_blk/null_blk.h |  1 +
>   drivers/block/null_blk/trace.h    | 23 ++++++++
>   4 files changed, 123 insertions(+), 3 deletions(-)
> 
Reviewed-by: Hannes Reinecke <hare@...e.de>

Cheers,

Hannes
-- 
Dr. Hannes Reinecke                Kernel Storage Architect
hare@...e.de                              +49 911 74053 688
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