Hi, I'm reviving this thread, following the discussion here: https://lore.kernel.org/bpf/87fscjakba.fsf@xxxxxxx/ On 21/10/2022 4:19, Alexei Starovoitov wrote:
On Thu, Oct 20, 2022 at 6:15 PM Joanne Koong <joannelkoong@xxxxxxxxx> wrote:This patchset is the 2nd in the dynptr series. The 1st can be found here [0]. This patchset adds skb and xdp type dynptrs, which have two main benefits for packet parsing: * allowing operations on sizes that are not statically known at compile-time (eg variable-sized accesses). * more ergonomic and less brittle iteration through data (eg does not need manual if checking for being within bounds of data_end) When comparing the differences in runtime for packet parsing without dynptrs vs. with dynptrs for the more simple cases, there is no noticeable difference. For the more complex cases where lengths are non-statically known at compile time, there can be a significant speed-up when using dynptrs (eg a 2x speed up for cls redirection). Patch 3 contains more details as well as examples of how to use skb and xdp dynptrs.Before proceeding with this patchset I think we gotta resolve the issues with dynptr-s that Kumar found.
Just to make sure I'm following: The issues that are discussed here? https://lore.kernel.org/all/CAP01T74icBDXOM=ckxYVPK90QLcU4n4VRBjON_+v74dQwJfZvw@xxxxxxxxxxxxxx/ What is the current status of dynptrs? Any updates since October? Do we have any agreement or a plan for this? Regards, Tariq
