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Miller" , Eric Dumazet , Michal Kubiak , intel-wired-lan@lists.osuosl.org, David Christensen , Jakub Kicinski , Paolo Abeni , Christoph Hellwig Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: intel-wired-lan-bounces@osuosl.org Sender: "Intel-wired-lan" From: Yunsheng Lin Date: Thu, 30 Nov 2023 16:46:11 +0800 > On 2023/11/29 21:17, Alexander Lobakin wrote: >> From: Yunsheng Lin >> Date: Wed, 29 Nov 2023 11:17:50 +0800 >> >>> On 2023/11/27 22:32, Alexander Lobakin wrote: >>>> >>>> Chris, any thoughts on a global flag for skipping DMA syncs ladder? >>> >>> It seems there was one already in the past: >>> >>> https://lore.kernel.org/netdev/7c55a4d7-b4aa-25d4-1917-f6f355bd722e@arm.com/T/ >> >> It addresses a different problem, meaningless indirect calls, while this >> one addresses meaningless direct calls :> >> When the above gets merged, we could combine these two into one global, >> but Eric wasn't active with his patch and I remember there were some >> problems, so I wouldn't count on that it will arrive soon. > > I went through the above patch, It seems to me that there was no > fundamental problem that stopping us from implementing it in the dma > layer basing on Eric' patch if Eric is no longer interested in working > on a newer version? I'm somewhat interested in continuing working on Eric's patch, but not now. Have some urgent projects to work on, I could take this in January I guess... This PP-specific shortcut was done earlier and gives good boosts. It would be trivial to remove it together with the XSk shortcut once a generic both indirect and direct call DMA shortcut lands. Does this sounds good / justified enough? Or you and other reviewers/maintainers would prefer to wait for the generic one without taking this patch? > > It is just that if we allow every subsystem and driver using dma API > doing their own trick of skipping dma sync, then there is less willing > to implement it in the dma layer. Thanks, Olek _______________________________________________ Intel-wired-lan mailing list Intel-wired-lan@osuosl.org https://lists.osuosl.org/mailman/listinfo/intel-wired-lan