On Fri, Jul 21, 2023 at 4:55 PM Oleg Nesterov <oleg@xxxxxxxxxx> wrote: > > Sorry for noise, apparently I haven't woken up yet, > > On 07/21, Oleg Nesterov wrote: > > > > Or. We can simply kill uprobe_multi_link_filter(). In this case uprobe_register() > > can touch CLONE_VM'ed mm's we are not interested in, but everything should work > > correctly. > > please ignore CLONE_VM'ed above, I have no idea why did I say this... > > Yes, everything should work "correctly", but if you add a probe into (say) libc.so, > every task will be penalized, so I don't think this is a good option. > Thanks for your explanation. Currently we can filter out the tgid in bpf prog, but if we could filter out it earlier, the prog won't be triggered, that would take less overhead. However, it is fine by me if tgid won't be supported. -- Regards Yafang
