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Message-ID: <8302be1b-416a-de32-c43b-73bd378f8122@intel.com> Date: Thu, 25 May 2023 13:08:19 +0200 From: Alexander Lobakin <aleksander.lobakin@...el.com> To: David Christensen <drc@...ux.vnet.ibm.com> CC: "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, Maciej Fijalkowski <maciej.fijalkowski@...el.com>, Magnus Karlsson <magnus.karlsson@...el.com>, Michal Kubiak <michal.kubiak@...el.com>, Larysa Zaremba <larysa.zaremba@...el.com>, "Jesper Dangaard Brouer" <hawk@...nel.org>, Ilias Apalodimas <ilias.apalodimas@...aro.org>, Christoph Hellwig <hch@....de>, <netdev@...r.kernel.org>, <intel-wired-lan@...ts.osuosl.org>, <linux-kernel@...r.kernel.org> Subject: Re: [PATCH net-next 08/11] iavf: switch to Page Pool From: David Christensen <drc@...ux.vnet.ibm.com> Date: Tue, 23 May 2023 15:42:28 -0700 > > > On 5/16/23 9:18 AM, Alexander Lobakin wrote: >> Now that the IAVF driver simply uses dev_alloc_page() + free_page() with >> no custom recycling logics and one whole page per frame, it can easily >> be switched to using Page Pool API instead. > > Any plans to add page pool fragmentation support (i.e. > PP_FLAG_PAGE_FRAG) in the future to better support architectures with > larger page sizes such as 64KB on ppc64le? Currently no, we resigned from page fragmentation due to the complexity and restrictions it provides for no benefits on x86_64. But I remember that pages > 4 Kb exist (I have a couple MIPS boards where I have fun sometimes and page size is set to 16 Kb there. But still always use 1 page per frame). By "better support" you mean reducing memory usage or something else? > > Dave Thanks, Olek
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