[PATCH v2 0/3] perf: Add PERF_EVENT_IOC_INC_EVENT_LIMIT

[Charlie Jenkins]

Introduce a new perf ioctl key PERF_EVENT_IOC_INC_EVENT_LIMIT that
functions the same as PERF_EVENT_IOC_REFRESH, except it does not
immediately enable counters.

Also create a libperf API perf_evsel__refresh() to allow libperf users
access to this ioctl key.

Signed-off-by: Charlie Jenkins <charlie@xxxxxxxxxxxx>
---
Changes in v2:
- Drop discussion about signal race condition
- Add new patch "libperf: Add perf_evsel__refresh() function"
- This newly added patch was pulled from a different series with
  modifications to fit the new ioctl key
-
https://lore.kernel.org/lkml/20240726-overflow_check_libperf-v2-0-7d154dcf6bea@xxxxxxxxxxxx/
will be updated
- Link to v1: https://lore.kernel.org/r/20240724-perf_set_event_limit-v1-0-e680c93eca55@xxxxxxxxxxxx

---
Charlie Jenkins (3):
      perf: Add PERF_EVENT_IOC_INC_EVENT_LIMIT
      perf: Document PERF_EVENT_IOC_INC_EVENT_LIMIT
      libperf: Add perf_evsel__refresh() function

 include/linux/perf_event.h               |  4 +--
 include/uapi/linux/perf_event.h          |  1 +
 kernel/events/core.c                     | 17 +++++++----
 tools/include/uapi/linux/perf_event.h    |  1 +
 tools/lib/perf/Documentation/libperf.txt |  2 ++
 tools/lib/perf/evsel.c                   | 49 ++++++++++++++++++++++++++------
 tools/lib/perf/include/perf/evsel.h      |  2 ++
 tools/lib/perf/libperf.map               |  2 ++
 tools/perf/design.txt                    |  5 ++++
 9 files changed, 67 insertions(+), 16 deletions(-)
---
base-commit: 0c3836482481200ead7b416ca80c68a29cfdaabd
change-id: 20240724-perf_set_event_limit-079f1b996376
-- 
- Charlie