Re: [PATCH v4 00/10] Move uid filtering to BPF filters

From: Namhyung Kim
Date: Tue Jun 10 2025 - 14:39:18 EST


On Wed, 04 Jun 2025 10:45:34 -0700, Ian Rogers wrote:
> Rather than scanning /proc and skipping PIDs based on their UIDs, use
> BPF filters for uid filtering. The /proc scanning in thread_map is
> racy as the PID may exit before the perf_event_open causing perf to
> abort. BPF UID filters are more robust as they avoid the race. The
> /proc scanning also misses processes starting after the perf
> command. Add a helper for commands that support UID filtering and wire
> up. Remove the non-BPF UID filtering support given it doesn't work.
>
> [...]
Applied to perf-tools-next, thanks!

Best regards,
Namhyung