Messages in this thread | | | From | "Jiang, Dave" <> | Subject | Re: [RFC] User space to kernel space copy optimization | Date | Mon, 16 Nov 2015 22:57:47 +0000 |
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On Mon, 2015-11-16 at 21:53 +0000, Sinan Kaya wrote: > One of the things I'm interested in is to use a memcpy capable DMA > engine HW to optimize user space and kernel space parameter copying.
Have you looked at why NET_DMA was deprecated and using DMA engine to do kernel->user copy could be a problem? https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/ ?id=77873803363c
> > Of course, this will not be viable for all parameter sizes but I can > see > this being useful. The goal is to save power in the cost of little > performance. > > Before I go and invent my own mechanism, I'd like to have ideas on > what > an acceptable solution would look like. Especially, I'm looking for a > generic implementation that could plug into any DMA engine HW. > > -- > Sinan Kaya > Qualcomm Technologies, Inc. on behalf of Qualcomm Innovation Center, > Inc. > Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a > Linux Foundation Collaborative Project > -- > To unsubscribe from this list: send the line "unsubscribe dmaengine" > in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html
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