Re: [PATCH v3 00/17] powerpc: alternate queued spinlock implementation

2023-04-13 Thread Shrikanth Hegde
On 11/26/22 3:29 PM, Nicholas Piggin wrote: > This replaces the generic queued spinlock code (like s390 does) with > our own implementation. There is an extra shim patch 1a to get the > series to apply. > > Generic PV qspinlock code is causing latency / starvation regressions on > large systems

Re: (subset) [PATCH v3 00/17] powerpc: alternate queued spinlock implementation

2022-12-08 Thread Michael Ellerman
On Sat, 26 Nov 2022 19:59:15 +1000, Nicholas Piggin wrote: > This replaces the generic queued spinlock code (like s390 does) with > our own implementation. There is an extra shim patch 1a to get the > series to apply. > > Generic PV qspinlock code is causing latency / starvation regressions on > l

[PATCH v3 00/17] powerpc: alternate queued spinlock implementation

2022-11-26 Thread Nicholas Piggin
This replaces the generic queued spinlock code (like s390 does) with our own implementation. There is an extra shim patch 1a to get the series to apply. Generic PV qspinlock code is causing latency / starvation regressions on large systems that are resulting in hard lockups reported (mostly in pat