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

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Message-ID: <20200818194930.GA31966@lst.de>
Date:   Tue, 18 Aug 2020 21:49:30 +0200
From:   Christoph Hellwig <hch@....de>
To:     Coly Li <colyli@...e.de>
Cc:     Christoph Hellwig <hch@....de>, 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 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.