On Mon, Jul 08, 2024 at 05:25:14PM -0700, Andrii Nakryiko wrote: > Quick profiling for the 8-threaded benchmark shows that we spend >20% > in mmap_read_lock/mmap_read_unlock in find_active_uprobe. I think > that's what would prevent uprobes from scaling linearly. If you have > some good ideas on how to get rid of that, I think it would be > extremely beneficial. That's find_vma() and friends. I started RCU-ifying that a *long* time ago when I started the speculative page fault patches. I sorta lost track of that effort, Willy where are we with that? Specifically, how feasible would it be to get a simple RCU based find_vma() version sorted these days?
