diff options
| author | Nicholas Piggin <[email protected]> | 2017-08-09 22:41:21 +1000 |
|---|---|---|
| committer | Michael Ellerman <[email protected]> | 2017-08-09 23:45:26 +1000 |
| commit | 0459ddfdb31e7d812b555a2530ecbacdf96961a6 (patch) | |
| tree | 872d7e7c3ea27de89c18a2710c672038281f2c8e /tools/perf/scripts/python/call-graph-from-sql.py | |
| parent | 7310d5c8c55e8987a854507f71022f8de676bbf4 (diff) | |
powerpc: NMI IPI improve lock primitive
When the NMI IPI lock is contended, spin at low SMT priority, using
loads only, and with interrupts enabled (where possible). This
improves behaviour under high contention (e.g., a system crash when
a number of CPUs are trying to enter the debugger).
Signed-off-by: Nicholas Piggin <[email protected]>
Signed-off-by: Michael Ellerman <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/call-graph-from-sql.py')
0 files changed, 0 insertions, 0 deletions