Search Linux Wireless

Re: Memory providers multiplexing (Was: [PATCH net-next v4 4/5] page_pool: remove PP_FLAG_PAGE_FRAG flag)

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Tue, 11 Jul 2023 10:20:58 -0600 David Ahern wrote:
> On 7/11/23 10:00 AM, Jakub Kicinski wrote:
> >> RDMA works with the AMD and Intel intree drivers using DMABUF without
> >> requiring struct pages using the DRM hacky scatterlist approach.  
> > I see, thanks. We need pages primarily for refcounting. Avoiding all
> > the infamous problems with memory pins. Oh well.  
> 
> io_uring for example already manages the page pinning. An skb flag was
> added for ZC Tx API to avoid refcounting in the core networking layer.

Right, we can refcount in similar fashion. Still tracking explicitly
when buffers are handed over to the NIC.

> Any reason not to allow an alternative representation for skb frags than
> struct page?

I don't think there's a hard technical reason. We can make it work.



[Index of Archives]     [Linux Host AP]     [ATH6KL]     [Linux Wireless Personal Area Network]     [Linux Bluetooth]     [Wireless Regulations]     [Linux Netdev]     [Kernel Newbies]     [Linux Kernel]     [IDE]     [Git]     [Netfilter]     [Bugtraq]     [Yosemite Hiking]     [MIPS Linux]     [ARM Linux]     [Linux RAID]

  Powered by Linux