Re: [PATCH bpf-next v6 2/2] bpf: Hold the perf callchain entry until used completely

[Tao Chen]

在 2025/11/14 00:01, Yonghong Song 写道:
> On 11/12/25 8:31 AM, Tao Chen wrote:
> > As Alexei noted, get_perf_callchain() return values may be reused
> > if a task is preempted after the BPF program enters migrate disable
> > mode. The perf_callchain_entres has a small stack of entries, and
> > we can reuse it as follows:
> >
> > 1. get the perf callchain entry
> > 2. BPF use...
> > 3. put the perf callchain entry
> >
> > And Peter suggested that get_recursion_context used with preemption
> > disabled, so we should disable preemption at BPF side.
> >
> > Signed-off-by: Tao Chen <chen.dylane@xxxxxxxxx>
>
> Acked-by: Yonghong Song <yonghong.song@xxxxxxxxx>

Hi eBPF maintainers,

This patch appears to have missed the eBPF maintainers on the list, 
please review it again, thanks.

--
Best Regards
Tao Chen