Hi Andrew, Hi Peter,
next version of the sem_lock() fixes:
The patches are again vs. tip.
Patch 1 is ready for merging, Patch 2 is for review.
- Patch 1 is the patch as in -next since January
It fixes the race that was found by Felix.
- Patch 2 removes the memory barriers that are part of the qspinlock
code.
- (The hysteresis patch would be patch 3. The risk of regressions
can't be ruled out, thus it must wait for benchmarks from real
workload tests)
Patch 1+2 were one patch, I've split patches so that review and
backporting are simpler.
--
Manfred
