Hi all, On Thu, Mar 30, 2023 at 10:10 AM Daniel P. Berrangé <berra...@redhat.com> wrote: > > On Thu, Mar 30, 2023 at 02:53:16PM +0800, Jason Wang wrote: > > On Thu, Mar 30, 2023 at 8:33 AM Andrew Melnychenko <and...@daynix.com> > > wrote: > > > > > > Changed eBPF map updates through mmaped array. > > > Mmaped arrays provide direct access to map data. > > > It should omit using bpf_map_update_elem() call, > > > which may require capabilities that are not present. > > > > This requires kernel support, so after this change, eBPF based RSS > > doesn't work on old kernels that only support syscall based map > > updating. >
It would not work either - bpf_map_update_elem() requires BPF capabilities. > What kernel version is the cut off ? If I'm not mistaken - something like kernel 5.5<. But in any case - the RSS eBPF program is quite big and would require features like jumpsback. So, on old kernels, it would not load. > > > With regards, > Daniel > -- > |: https://berrange.com -o- https://www.flickr.com/photos/dberrange :| > |: https://libvirt.org -o- https://fstop138.berrange.com :| > |: https://entangle-photo.org -o- https://www.instagram.com/dberrange :| >
