diff options
| author | Michal Hocko <[email protected]> | 2021-01-18 15:12:19 +0100 |
|---|---|---|
| committer | Ingo Molnar <[email protected]> | 2021-02-17 14:12:24 +0100 |
| commit | 6ef869e0647439af0fc28dde162d33320d4e1dd7 (patch) | |
| tree | d9f08abf364f601b9b2ff6225fb4118b9ff739d4 /tools/perf/util/scripting-engines/trace-event-perl.c | |
| parent | 29fd01944b7273bb630c649a2104b7f9e4ef3fa6 (diff) | |
preempt: Introduce CONFIG_PREEMPT_DYNAMIC
Preemption mode selection is currently hardcoded on Kconfig choices.
Introduce a dedicated option to tune preemption flavour at boot time,
This will be only available on architectures efficiently supporting
static calls in order not to tempt with the feature against additional
overhead that might be prohibitive or undesirable.
CONFIG_PREEMPT_DYNAMIC is automatically selected by CONFIG_PREEMPT if
the architecture provides the necessary support (CONFIG_STATIC_CALL_INLINE,
CONFIG_GENERIC_ENTRY, and provide with __preempt_schedule_function() /
__preempt_schedule_notrace_function()).
Suggested-by: Peter Zijlstra <[email protected]>
Signed-off-by: Michal Hocko <[email protected]>
Signed-off-by: Frederic Weisbecker <[email protected]>
[peterz: relax requirement to HAVE_STATIC_CALL]
Signed-off-by: Peter Zijlstra (Intel) <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
Link: https://lkml.kernel.org/r/[email protected]
Diffstat (limited to 'tools/perf/util/scripting-engines/trace-event-perl.c')
0 files changed, 0 insertions, 0 deletions