Re: [PATCH net-next v6 04/18] mm: Make the page_frag_cache allocator use per-cpu

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To: David Howells <dhowells@xxxxxxxxxx>
Subject: Re: [PATCH net-next v6 04/18] mm: Make the page_frag_cache allocator use per-cpu
From: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Date: Tue, 11 Apr 2023 09:55:45 -0700
Cc: netdev@xxxxxxxxxxxxxxx, "David S. Miller" <davem@xxxxxxxxxxxxx>, Eric Dumazet <edumazet@xxxxxxxxxx>, Jakub Kicinski <kuba@xxxxxxxxxx>, Paolo Abeni <pabeni@xxxxxxxxxx>, Willem de Bruijn <willemdebruijn.kernel@xxxxxxxxx>, David Ahern <dsahern@xxxxxxxxxx>, Matthew Wilcox <willy@xxxxxxxxxxxxx>, Al Viro <viro@xxxxxxxxxxxxxxxxxx>, Christoph Hellwig <hch@xxxxxxxxxxxxx>, Jens Axboe <axboe@xxxxxxxxx>, Jeff Layton <jlayton@xxxxxxxxxx>, Christian Brauner <brauner@xxxxxxxxxx>, Chuck Lever III <chuck.lever@xxxxxxxxxx>, Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>, linux-fsdevel@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, linux-mm@xxxxxxxxx, Jeroen de Borst <jeroendb@xxxxxxxxxx>, Catherine Sullivan <csully@xxxxxxxxxx>, Shailend Chand <shailend@xxxxxxxxxx>, Felix Fietkau <nbd@xxxxxxxx>, John Crispin <john@xxxxxxxxxxx>, Sean Wang <sean.wang@xxxxxxxxxxxx>, Mark Lee <Mark-MC.Lee@xxxxxxxxxxxx>, Lorenzo Bianconi <lorenzo@xxxxxxxxxx>, Matthias Brugger <matthias.bgg@xxxxxxxxx>, AngeloGioacchino Del Regno <angelogioacchino.delregno@xxxxxxxxxxxxx>, Keith Busch <kbusch@xxxxxxxxxx>, Jens Axboe <axboe@xxxxxx>, Christoph Hellwig <hch@xxxxxx>, Sagi Grimberg <sagi@xxxxxxxxxxx>, Chaitanya Kulkarni <kch@xxxxxxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, linux-arm-kernel@xxxxxxxxxxxxxxxxxxx, linux-mediatek@xxxxxxxxxxxxxxxxxxx, linux-nvme@xxxxxxxxxxxxxxxxxxx
In-reply-to: <20230411160902.4134381-5-dhowells@redhat.com>

On Tue, Apr 11, 2023 at 05:08:48PM +0100, David Howells wrote:
> Make the NVMe, mediatek and GVE drivers pass in NULL to page_frag_cache()
> and use the default allocation buckets rather than defining their own.

Why makes these different from the other users?

References:
- [PATCH net-next v6 00/18] splice, net: Replace sendpage with sendmsg(MSG_SPLICE_PAGES), part 1
  - From: David Howells
- [PATCH net-next v6 04/18] mm: Make the page_frag_cache allocator use per-cpu
  - From: David Howells

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