diff options
| author | Nicholas Piggin <[email protected]> | 2018-06-01 20:01:20 +1000 |
|---|---|---|
| committer | Michael Ellerman <[email protected]> | 2018-06-03 20:40:36 +1000 |
| commit | 85bcfaf69cbd610fdfac3351cf385809a2f4a93b (patch) | |
| tree | 0c3ec307217742cf1857462744ca588ecca006e9 /tools/perf/scripts/python/net_dropmonitor.py | |
| parent | f1cb8f9beba8699dd1b4518418191499e53f7b17 (diff) | |
powerpc/64s/radix: optimise pte_update
Implementing pte_update with pte_xchg (which uses cmpxchg) is
inefficient. A single larx/stcx. works fine, no need for the less
efficient cmpxchg sequence.
Then remove the memory barriers from the operation. There is a
requirement for TLB flushing to load mm_cpumask after the store
that reduces pte permissions, which is moved into the TLB flush
code.
Signed-off-by: Nicholas Piggin <[email protected]>
Signed-off-by: Michael Ellerman <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/net_dropmonitor.py')
0 files changed, 0 insertions, 0 deletions