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Message-ID: <CAKgT0UcqdeSJdjZ_FfwyCnT927TwOkE4zchHLOkrBEmhGzex9g@mail.gmail.com>
Date: Wed, 31 Jul 2024 11:13:54 -0700
From: Alexander Duyck <alexander.duyck@...il.com>
To: Yunsheng Lin <linyunsheng@...wei.com>
Cc: davem@...emloft.net, kuba@...nel.org, pabeni@...hat.com, 
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org, 
	Subbaraya Sundeep <sbhatta@...vell.com>, Jeroen de Borst <jeroendb@...gle.com>, 
	Praveen Kaligineedi <pkaligineedi@...gle.com>, Shailend Chand <shailend@...gle.com>, 
	Eric Dumazet <edumazet@...gle.com>, Tony Nguyen <anthony.l.nguyen@...el.com>, 
	Przemek Kitszel <przemyslaw.kitszel@...el.com>, Sunil Goutham <sgoutham@...vell.com>, 
	Geetha sowjanya <gakula@...vell.com>, hariprasad <hkelam@...vell.com>, Felix Fietkau <nbd@....name>, 
	Sean Wang <sean.wang@...iatek.com>, Mark Lee <Mark-MC.Lee@...iatek.com>, 
	Lorenzo Bianconi <lorenzo@...nel.org>, Matthias Brugger <matthias.bgg@...il.com>, 
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>, Keith Busch <kbusch@...nel.org>, 
	Jens Axboe <axboe@...nel.dk>, Christoph Hellwig <hch@....de>, Sagi Grimberg <sagi@...mberg.me>, 
	Chaitanya Kulkarni <kch@...dia.com>, "Michael S. Tsirkin" <mst@...hat.com>, Jason Wang <jasowang@...hat.com>, 
	Eugenio Pérez <eperezma@...hat.com>, 
	Andrew Morton <akpm@...ux-foundation.org>, Alexei Starovoitov <ast@...nel.org>, 
	Daniel Borkmann <daniel@...earbox.net>, Jesper Dangaard Brouer <hawk@...nel.org>, 
	John Fastabend <john.fastabend@...il.com>, Andrii Nakryiko <andrii@...nel.org>, 
	Martin KaFai Lau <martin.lau@...ux.dev>, Eduard Zingerman <eddyz87@...il.com>, Song Liu <song@...nel.org>, 
	Yonghong Song <yonghong.song@...ux.dev>, KP Singh <kpsingh@...nel.org>, 
	Stanislav Fomichev <sdf@...ichev.me>, Hao Luo <haoluo@...gle.com>, Jiri Olsa <jolsa@...nel.org>, 
	David Howells <dhowells@...hat.com>, Marc Dionne <marc.dionne@...istor.com>, 
	Chuck Lever <chuck.lever@...cle.com>, Jeff Layton <jlayton@...nel.org>, Neil Brown <neilb@...e.de>, 
	Olga Kornievskaia <kolga@...app.com>, Dai Ngo <Dai.Ngo@...cle.com>, Tom Talpey <tom@...pey.com>, 
	Trond Myklebust <trondmy@...nel.org>, Anna Schumaker <anna@...nel.org>, intel-wired-lan@...ts.osuosl.org, 
	linux-arm-kernel@...ts.infradead.org, linux-mediatek@...ts.infradead.org, 
	linux-nvme@...ts.infradead.org, kvm@...r.kernel.org, 
	virtualization@...ts.linux.dev, linux-mm@...ck.org, bpf@...r.kernel.org, 
	linux-afs@...ts.infradead.org, linux-nfs@...r.kernel.org
Subject: Re: [PATCH net-next v12 04/14] mm: page_frag: add '_va' suffix to
 page_frag API

On Wed, Jul 31, 2024 at 5:50 AM Yunsheng Lin <linyunsheng@...wei.com> wrote:
>
> Currently the page_frag API is returning 'virtual address'
> or 'va' when allocing and expecting 'virtual address' or
> 'va' as input when freeing.
>
> As we are about to support new use cases that the caller
> need to deal with 'struct page' or need to deal with both
> 'va' and 'struct page'. In order to differentiate the API
> handling between 'va' and 'struct page', add '_va' suffix
> to the corresponding API mirroring the page_pool_alloc_va()
> API of the page_pool. So that callers expecting to deal with
> va, page or both va and page may call page_frag_alloc_va*,
> page_frag_alloc_pg*, or page_frag_alloc* API accordingly.
>
> CC: Alexander Duyck <alexander.duyck@...il.com>
> Signed-off-by: Yunsheng Lin <linyunsheng@...wei.com>
> Reviewed-by: Subbaraya Sundeep <sbhatta@...vell.com>

I am naking this patch. It is a pointless rename that is just going to
obfuscate the git history for these callers.

As I believe I said before I would prefer to see this work more like
the handling of __get_free_pages and __free_pages in terms of the use
of pages versus pointers and/or longs. Pushing this API aside because
you want to reuse the name for something different isn't a valid
reason to rename an existing API and will just lead to confusion.

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