On Mon, Jan 15, 2024, Paul Durrant wrote: > From: Paul Durrant <pdurrant@xxxxxxxxxx> > > Taking a write lock on a pfncache will be disruptive if the cache is *Unnecessarily* taking a write lock. Please save readers a bit of brain power and explain that this is beneificial when there are _unrelated_ invalidation. > heavily used (which only requires a read lock). Hence, in the MMU notifier > callback, take read locks on caches to check for a match; only taking a > write lock to actually perform an invalidation (after a another check). This doesn't have any dependency on this series, does it? I.e. this should be posted separately, and preferably with some performance data. Not having data isn't a sticking point, but it would be nice to verify that this isn't a pointless optimization.
