From: Jakub Kicinski <kuba@kernel.org>
To: Alexander Lobakin <aleksander.lobakin@intel.com>
Cc: Yunsheng Lin <linyunsheng@huawei.com>,
Christoph Hellwig <hch@lst.de>,
Maciej Fijalkowski <maciej.fijalkowski@intel.com>,
Michal Kubiak <michal.kubiak@intel.com>,
Larysa Zaremba <larysa.zaremba@intel.com>,
Alexander Duyck <alexanderduyck@fb.com>,
David Christensen <drc@linux.vnet.ibm.com>,
Jesper Dangaard Brouer <hawk@kernel.org>,
"Ilias Apalodimas" <ilias.apalodimas@linaro.org>,
Paul Menzel <pmenzel@molgen.mpg.de>, <netdev@vger.kernel.org>,
<intel-wired-lan@lists.osuosl.org>,
<linux-kernel@vger.kernel.org>,
"David S. Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@google.com>,
Paolo Abeni <pabeni@redhat.com>
Subject: Re: [PATCH net-next v5 03/14] page_pool: avoid calling no-op externals when possible
Date: Mon, 27 Nov 2023 10:17:20 -0800 [thread overview]
Message-ID: <20231127101720.282862f6@kernel.org> (raw)
In-Reply-To: <a1a0c27f-f367-40e7-9dc2-9421b4b6379a@intel.com>
On Mon, 27 Nov 2023 15:32:19 +0100 Alexander Lobakin wrote:
> > Sorry for not remembering the suggestion:(
>
> In the previous versions of this change I used a global flag per whole
> page_pool, just like XSk does for the whole XSk buff pool, then you
> proposed to use the lowest bit of ::dma_addr and store it per page, so
> that it would be more granular/precise. I tested it and it doesn't
> perform worse than global, but in some cases may be beneficial.
FWIW I'd vote to stick to per-page pool. You seem to handle the
sizeof(dma_addr_t) > sizeof(long) case correctly but the code is
growing in complexity, providing no known/measurable benefit.
We can always do this later but for now it seems like a premature
optimization to me.
next prev parent reply other threads:[~2023-11-27 18:17 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-11-24 15:47 [PATCH net-next v5 00/14] net: intel: start The Great Code Dedup + Page Pool for iavf Alexander Lobakin
2023-11-24 15:47 ` [PATCH net-next v5 01/14] page_pool: make sure frag API fields don't span between cachelines Alexander Lobakin
2023-11-25 12:29 ` Yunsheng Lin
2023-11-27 14:08 ` Alexander Lobakin
2023-11-29 2:55 ` Yunsheng Lin
2023-11-29 13:12 ` Alexander Lobakin
2023-11-26 22:54 ` Jakub Kicinski
2023-11-27 14:12 ` Alexander Lobakin
2023-11-24 15:47 ` [PATCH net-next v5 02/14] page_pool: don't use driver-set flags field directly Alexander Lobakin
2023-11-24 15:47 ` [PATCH net-next v5 03/14] page_pool: avoid calling no-op externals when possible Alexander Lobakin
2023-11-25 13:04 ` Yunsheng Lin
2023-11-27 14:32 ` Alexander Lobakin
2023-11-27 18:17 ` Jakub Kicinski [this message]
2023-11-28 16:50 ` Alexander Lobakin
2023-11-29 3:17 ` Yunsheng Lin
2023-11-29 13:17 ` [Intel-wired-lan] " Alexander Lobakin
2023-11-30 8:46 ` Yunsheng Lin
2023-11-30 11:58 ` Alexander Lobakin
2023-11-30 12:20 ` Yunsheng Lin
2023-12-01 14:37 ` Alexander Lobakin
2023-12-12 15:25 ` Christoph Hellwig
2023-11-24 15:47 ` [PATCH net-next v5 04/14] net: intel: introduce Intel Ethernet common library Alexander Lobakin
2023-11-24 15:47 ` [PATCH net-next v5 05/14] iavf: kill "legacy-rx" for good Alexander Lobakin
2023-11-24 15:47 ` [PATCH net-next v5 06/14] iavf: drop page splitting and recycling Alexander Lobakin
2023-11-24 15:47 ` [PATCH net-next v5 07/14] page_pool: constify some read-only function arguments Alexander Lobakin
2023-11-24 15:47 ` [PATCH net-next v5 08/14] page_pool: add DMA-sync-for-CPU inline helpers Alexander Lobakin
2023-11-24 15:47 ` [PATCH net-next v5 09/14] libie: add Rx buffer management (via Page Pool) Alexander Lobakin
2023-11-24 15:47 ` [PATCH net-next v5 10/14] iavf: pack iavf_ring more efficiently Alexander Lobakin
2023-11-24 15:47 ` [PATCH net-next v5 11/14] iavf: switch to Page Pool Alexander Lobakin
2023-11-24 15:47 ` [PATCH net-next v5 12/14] libie: add common queue stats Alexander Lobakin
2023-11-24 15:47 ` [PATCH net-next v5 13/14] libie: add per-queue Page Pool stats Alexander Lobakin
2023-11-29 13:40 ` Alexander Lobakin
2023-11-29 14:29 ` Jakub Kicinski
2023-11-30 16:01 ` Alexander Lobakin
2023-11-30 16:45 ` Alexander Lobakin
2023-12-01 6:55 ` Jakub Kicinski
2023-11-24 15:47 ` [PATCH net-next v5 14/14] iavf: switch queue stats to libie Alexander Lobakin
2023-11-27 9:04 ` [PATCH net-next v5 00/14] net: intel: start The Great Code Dedup + Page Pool for iavf Jiri Pirko
2023-11-27 10:23 ` Przemek Kitszel
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