[LU-11296] page cache cleanup improvement on lock flush

• Type: Improvement
• Resolution: Fixed
• Priority: Major
• Fix Version/s: Lustre 2.13.0, Lustre 2.12.3
• Labels: patch
• Assignee: Andrew Perepechko
• Reporter: Andrew Perepechko

Description

If client A writes a 100 GiB file, then client B attempts to read it, the cached PW lock on client A will be flushed together with page cache data. It can take 5-10 s just to complete that.

 

We can speed up cache invalidation a bit.