This patch set introduces two enhancements aimed at improving tailcall
handling in the x64 JIT:
1. Tailcall info is propagated only for subprogs.
2. Tailcall info is propagated through the trampoline only when the target
is a subprog and it is tail_call_reachable.
Changes:
v2 -> v3:
* Add Yonghong's ACK.
v1 -> v2:
* Address comment from Alexei:
* Rather live with tail call inefficiency than abuse insns fields
further.
Leon Hwang (2):
bpf, x64: Propagate tailcall info only for subprogs
bpf, verifier: Check trampoline target is tail_call_reachable subprog
arch/x86/net/bpf_jit_comp.c | 3 ++-
include/linux/bpf.h | 1 +
kernel/bpf/verifier.c | 4 +++-
3 files changed, 6 insertions(+), 2 deletions(-)
--
2.44.0
