> On Oct 24, 2025, at 11:28 AM, Song Liu <[email protected]> wrote: > > livepatch and BPF trampoline are two special users of ftrace. livepatch > uses ftrace with IPMODIFY flag and BPF trampoline uses ftrace direct > functions. When livepatch and BPF trampoline with fexit programs attach to > the same kernel function, BPF trampoline needs to call into the patched > version of the kernel function. > > 1/3 and 2/3 of this patchset fix two issues with livepatch + fexit cases, > one in the register_ftrace_direct path, the other in the > modify_ftrace_direct path. > > 3/3 adds selftests for both cases.
AI has a good point on this: https://github.com/kernel-patches/bpf/pull/10088#issuecomment-3444465504 I will wait a bit more for human to chime in before sending v3 with the suggestion by AI. Thanks, Song
