linux-kernel - Re: [PATCH v15 05/17] overlayfs: Implement splice-read

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Date:   Wed, 15 Feb 2023 08:38:01 -0800
From:   Christoph Hellwig <hch@...radead.org>
To:     Matthew Wilcox <willy@...radead.org>
Cc:     Miklos Szeredi <miklos@...redi.hu>,
        David Howells <dhowells@...hat.com>,
        Jens Axboe <axboe@...nel.dk>,
        Al Viro <viro@...iv.linux.org.uk>,
        Christoph Hellwig <hch@...radead.org>, Jan Kara <jack@...e.cz>,
        Jeff Layton <jlayton@...nel.org>,
        David Hildenbrand <david@...hat.com>,
        Jason Gunthorpe <jgg@...dia.com>,
        Logan Gunthorpe <logang@...tatee.com>,
        Hillf Danton <hdanton@...a.com>, linux-fsdevel@...r.kernel.org,
        linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org, Christoph Hellwig <hch@....de>,
        John Hubbard <jhubbard@...dia.com>,
        linux-unionfs@...r.kernel.org
Subject: Re: [PATCH v15 05/17] overlayfs: Implement splice-read

On Wed, Feb 15, 2023 at 03:53:23PM +0000, Matthew Wilcox wrote:
> On Wed, Feb 15, 2023 at 04:50:04PM +0100, Miklos Szeredi wrote:
> > Looks good.  One more suggestion: add a vfs_splice() helper and use
> > that from do_splice_to() as well.
> 
> I really hate call_read_iter() etc.  Please don't perpetuate that
> pattern.

I think it's time to kill it.  I'll prepare a patch for it.