On Mon, Oct 16, 2023 at 10:42:59PM +1000, Nicholas Piggin wrote: > This fixes a long-standing latency bug in the powerpc qspinlock > implementation that quite a few people have reported and helped > out with debugging. > > The first patch is a minimal fix that avoids the problem. The > other patches are streamlining and improvements after the fix. > > Thanks, > Nick > > Nicholas Piggin (6): > powerpc/qspinlock: Fix stale propagated yield_cpu > powerpc/qspinlock: stop queued waiters trying to set lock sleepy > powerpc/qspinlock: propagate owner preemptedness rather than CPU > number > powerpc/qspinlock: don't propagate the not-sleepy state > powerpc/qspinlock: Propagate sleepy if previous waiter is preempted > powerpc/qspinlock: Rename yield_propagate_owner tunable > > arch/powerpc/lib/qspinlock.c | 119 +++++++++++++++-------------------- > 1 file changed, 52 insertions(+), 67 deletions(-) > > -- > 2.42.0 > Just a minor comment regarding patch 2.
For the series: Reviewed-by: Nysal Jan K.A <ny...@linux.ibm.com>