linux-kernel - Re: [PATCH 02/21] block: Add bio_add

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Date:   Tue, 2 Nov 2021 14:15:26 +0000
From:   Matthew Wilcox <willy@...radead.org>
To:     Jens Axboe <axboe@...nel.dk>
Cc:     "Darrick J. Wong" <djwong@...nel.org>, linux-xfs@...r.kernel.org,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-block@...r.kernel.org, Christoph Hellwig <hch@...radead.org>
Subject: Re: [PATCH 02/21] block: Add bio_add_folio()

On Mon, Nov 01, 2021 at 02:51:37PM -0600, Jens Axboe wrote:
> On 11/1/21 2:39 PM, Matthew Wilcox (Oracle) wrote:
> > This is a thin wrapper around bio_add_page().  The main advantage here
> > is the documentation that stupidly large folios are not supported.
> > It's not currently possible to allocate stupidly large folios, but if
> > it ever becomes possible, this function will fail gracefully instead of
> > doing I/O to the wrong bytes.
> 
> Might be better with UINT_MAX instead of stupidly here, because then
> it immediately makes sense. Can you make a change to that effect?

I'll make it "that folios larger than 2GiB are not supported.  It's not
currently possible to allocate folios that large,"

> With that:
> 
> Reviewed-by: Jens Axboe <axboe@...nel.dk>
> 
> -- 
> Jens Axboe
>