Re: [PATCH net v1] net: Fix tuntap uninitialized value

[Lei Yang]

QE tested this patch with virtio-net regression tests, everything works fine.

Tested-by: Lei Yang <leiyang@xxxxxxxxxx>


On Fri, Mar 28, 2025 at 7:39 PM Jakub Kicinski <kuba@xxxxxxxxxx> wrote:
>
> On Fri, 28 Mar 2025 09:15:53 +0000 Jiayuan Chen wrote:
> > I'm wondering if we can directly perform a memset in bpf_xdp_adjust_head
> > when users execute an expand header (offset < 0).
>
> Same situation happens in bpf_xdp_adjust_meta(), but I'm pretty
> sure this was discussed and considered too high cost for XDP.
> Could you find the old discussions and double check the arguments
> made back then? Opinions may have changed but let's make sure we're
> not missing anything. And performance numbers would be good to have
> since the main reason this isn't done today was perf.
>