Additionally, for dbdda842fe96f to work as expected we really
need fd5f7cde1b85d4c. Otherwise printk() can schedule under console_sem and console_owner, which will deactivate the "load balance" logic.
It looks like fd5f7cde1b85d4c got into 4.14.82 that was released last month.
On Wed, Dec 12, 2018 at 6:27 PM Sergey Senozhatsky sergey.senozhatsky.work@gmail.com wrote:
On (12/12/18 16:40), Daniel Wang wrote:
In case this was buried in previous messages, the commit I'd like to get backported to 4.14 is dbdda842fe96f: printk: Add console owner and waiter logic to load balance console writes. But another followup patch that fixes a bug in that patch is also required. That is c14376de3a1b: printk: Wake klogd when passing console_lock owner.
Additionally, for dbdda842fe96f to work as expected we really need fd5f7cde1b85d4c. Otherwise printk() can schedule under console_sem and console_owner, which will deactivate the "load balance" logic.
-ss