Hello, again. On Mon, Dec 04, 2023 at 04:03:47PM +0000, Naohiro Aota wrote: ... > In summary, we misuse max_active, considering it is a global limit. And, > the recent commit introduced a huge performance drop in some cases. We > need to review alloc_workqueue() usage to check if its max_active setting > is proper or not. Can you please test the following branch? https://git.kernel.org/pub/scm/linux/kernel/git/tj/wq.git unbound-system-wide-max_active Thanks. -- tejun