On Thu, Nov 12, 2020 at 11:22:12AM +0800, Boqun Feng wrote: > For the "BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low!" warning, do you see > that every time when you run xfstests and don't see other lockdep > splats? If so, that means we reach the limitation of number of lockdep > hlock chains, and we should fix that.
It's not every time and depends on the release, eg. I found no reports in a sample log for 5.7..5.9, while there are many for 5.2..5.6 and 5.10, every 2nd or 3rd run. [ 0.185150] ... MAX_LOCKDEP_SUBCLASSES: 8 [ 0.186202] ... MAX_LOCK_DEPTH: 48 [ 0.187286] ... MAX_LOCKDEP_KEYS: 8192 [ 0.188404] ... CLASSHASH_SIZE: 4096 [ 0.189519] ... MAX_LOCKDEP_ENTRIES: 32768 [ 0.190672] ... MAX_LOCKDEP_CHAINS: 65536 [ 0.191814] ... CHAINHASH_SIZE: 32768
