On Wed, 31 Oct 2018, Daniel Wagner wrote: > Backporting all qspinlock related patches is very likely to introduce > regressions on v4.4. Therefore, the recommended solution by Peter and > Thomas is to drop back to ticket spinlocks for v4.4. > > Link :https://lkml.kernel.org/r/20180921120226.6xjgr4oiho22ex75@xxxxxxxxxxxxx > Link: https://lkml.kernel.org/r/20180926110117.405325143@xxxxxxxxxxxxx > Cc: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx> > Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx> > Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx> Acked-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx> > Signed-off-by: Daniel Wagner <daniel.wagner@xxxxxxxxxxx> > --- > > Thomas suggest following plan for fixing the issues on the varous > stable trees: > > 4.4: Trivial by switching back to ticket locks. > > 4.9: Decide whether bringing back ticket locks or backporting all qrlock > fixes. Sebastian has done the latter already and it's probably the > right solution > > 4.14: > 4.18: Backporting the qrlock fixes > > 4.19: Either the fix ends up in 4.19 final or it needs to be backported Looks about right. Sebastian, can you please provide the 4.9 backport as a patch series? Thanks, tglx
