netdev - Re: [PATCH v7 1/6] net: introduce helper sendpage

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Message-ID: <58455251-7d90-b890-17dc-abe0954715e1@suse.de>
Date:   Wed, 23 Sep 2020 16:45:07 +0800
From:   Coly Li <colyli@...e.de>
To:     Christoph Hellwig <hch@....de>
Cc:     linux-block@...r.kernel.org, linux-nvme@...ts.infradead.org,
        netdev@...r.kernel.org, open-iscsi@...glegroups.com,
        linux-scsi@...r.kernel.org, ceph-devel@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Chaitanya Kulkarni <chaitanya.kulkarni@....com>,
        Hannes Reinecke <hare@...e.de>, Jan Kara <jack@...e.com>,
        Jens Axboe <axboe@...nel.dk>,
        Mikhail Skorzhinskii <mskorzhinskiy@...arflare.com>,
        Philipp Reisner <philipp.reisner@...bit.com>,
        Sagi Grimberg <sagi@...mberg.me>,
        Vlastimil Babka <vbabka@...e.com>, stable@...r.kernel.org
Subject: Re: [PATCH v7 1/6] net: introduce helper sendpage_ok() in
 include/linux/net.h

On 2020/9/23 16:43, Christoph Hellwig wrote:
> On Wed, Aug 19, 2020 at 12:22:05PM +0800, Coly Li wrote:
>> On 2020/8/19 03:49, Christoph Hellwig wrote:
>>> On Wed, Aug 19, 2020 at 12:33:37AM +0800, Coly Li wrote:
>>>> On 2020/8/19 00:24, Christoph Hellwig wrote:
>>>>> I think we should go for something simple like this instead:
>>>>
>>>> This idea is fine to me. Should a warning message be through here? IMHO
>>>> the driver still sends an improper page in, fix it in silence is too
>>>> kind or over nice to the buggy driver(s).
>>>
>>> I don't think a warning is a good idea.  An API that does the right
>>> thing underneath and doesn't require boiler plate code in most callers
>>> is the right API.
>>>
>>
>> Then I don't have more comment.
> 
> So given the feedback from Dave I suspect we should actually resurrect
> this series, sorry for the noise.  And in this case I think we do need
> the warning in kernel_sendpage.
> 

Copied, then I will post a v8 series, which adding a warning message in
kernel_sendpage() if non-acceptible paage sent in.

Coly Li