On Fri, Jan 11, 2019 at 12:54 PM Linus Torvalds <torva...@linux-foundation.org> wrote: > > On Fri, Jan 11, 2019 at 12:31 PM Josh Poimboeuf <jpoim...@redhat.com> wrote: > > > > I was referring to the fact that a single static call key update will > > usually result in patching multiple call sites. But you're right, it's > > only 1-2 trampolines per text_poke_bp() invocation. Though eventually > > we may want to batch all the writes like what Daniel has proposed for > > jump labels, to reduce IPIs. > > Yeah, my suggestion doesn't allow for batching, since it would > basically generate one trampoline for every rewritten instruction.
Sure it does. Just make 1000 trampolines and patch 1000 sites in a batch :) As long as the number of trampolines is smallish (e.g. fits in a page), then we should be in good shape.
