Re: [LKP] [ext4] 05c2c00f37: aim7.jobs-per-min -11.8% regression

[Theodore Y. Ts'o]

On Fri, May 21, 2021 at 11:27:30AM +0200, Jan Kara wrote:
> 
> OK, thanks for testing. So the orphan code is indeed the likely cause of
> this regression but I probably did not guess correctly what is the
> contention point there. Then I guess I need to reproduce and do more
> digging why the contention happens...

Hmm... what if we only recalculate the superblock checksum when we do
a commit, via the callback function from the jbd2 layer to file
system?

					- Ted