On Sat, Feb 7, 2026 at 6:49 PM Chengkaitao <[email protected]> wrote: > > From: Kaitao Cheng <[email protected]> > > When traversing an rbtree using bpf_rbtree_left/right, if bpf_kptr_xchg > is used to access the __kptr pointer contained in a node, it currently > requires first removing the node with bpf_rbtree_remove and clearing the > NON_OWN_REF flag, then re-adding the node to the original rbtree with > bpf_rbtree_add after usage. This process significantly degrades rbtree > traversal performance. The patch enables accessing __kptr pointers with > the NON_OWN_REF flag set while holding the lock, eliminating the need > for this remove-read-add sequence. > > Signed-off-by: Kaitao Cheng <[email protected]> > Signed-off-by: Feng Yang <[email protected]> > --- > kernel/bpf/verifier.c | 4 +++- > 1 file changed, 3 insertions(+), 1 deletion(-) > > diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c > index 05a6a6606b6c..bb3ff4bbb3a2 100644 > --- a/kernel/bpf/verifier.c > +++ b/kernel/bpf/verifier.c > @@ -9260,7 +9260,8 @@ static const struct bpf_reg_types timer_types = { > .types = { PTR_TO_MAP_VALUE } > static const struct bpf_reg_types kptr_xchg_dest_types = { > .types = { > PTR_TO_MAP_VALUE, > - PTR_TO_BTF_ID | MEM_ALLOC > + PTR_TO_BTF_ID | MEM_ALLOC, > + PTR_TO_BTF_ID | MEM_ALLOC | NON_OWN_REF
add a comma, so the next patch doesn't need to add it and has less churn. PTR_TO_BTF_ID | MEM_ALLOC | NON_OWN_REF | MEM_RCU , <-- comma too Also don't invent new prefixes. Either "bpf: ..." or "selftests/bpf: ...". pw-bot: cr
