Yuri Benditovich <yuri.benditovich@daynix.com> writes:

> On Mon, Aug 30, 2021 at 11:14 AM Markus Armbruster <armbru@redhat.com> wrote:
>>
>> Yuri Benditovich <yuri.benditovich@daynix.com> writes:
>>
>> > On Mon, Aug 30, 2021 at 9:10 AM Markus Armbruster <armbru@redhat.com> wrote:

[...]

>> >> So let's try again: if libvirt does use the wrong RSS helper, how does
>> >> the system behave?
>> >
>> > The receive-side scaling may work incorrectly, i.e. finally may move
>> > incoming packets to a virtqueue different than expected one.
>>
>> Then I'm confused about the purpose of "the stamp" mentioned below.  Can
>> you enlighten me?
>
> The stamp is a string (common for qemu executable and RSS helper
> executable during build) that qemu can later retrieve from the helper
> in run-time and ensure this helper is fully compatible with this build
> of qemu (in terms of eBPF operation). The helper is built with the
> same C headers (related to ebpf operation) as the qemu, the qemu is
> able to receive file descriptors created by the helper (of ebpf
> program and ebpf data structure's maps) from libvirt and deal with
> them as if it has created them.

Thanks.

I tried to apply your series to check a few of my assumptions, but I'm
getting conflicts.  Got something I could git-pull?

[...]