On Fri, Dec 01, 2023 at 10:13:09AM +0800, Oliver Sang wrote: > > Very interesting... Out of curiosity, what effect would the following > > have on top of 1b738f196e? > > I applied the patch upon 1b738f196e (as below fec356fd0c), but seems less > useful. I would be rather surprised if it fixed anything; it's just that 1b738f196e changes two things - locking rules for __dentry_kill() and, in some cases, the order of dentry eviction in shrink_dentry_list(). That delta on top of it restores the original order in shrink_dentry_list(), leaving pretty much the changes in lock_for_kill()/dput()/__dentry_kill(). Interesting... Looks like there are serious changes in context switch frequencies, but I don't see where could that have come from...
