Re: PNP0501 serial driver takes almost 2 seconds to suspend/resume (printk issue)

From: John Ogness
Date: Wed Jul 13 2022 - 05:52:06 EST

On 2022-07-11, Sergey Senozhatsky <senozhatsky@xxxxxxxxxxxx> wrote:
>> It seems that __pr_flush() does not check whether all consoles are
>> suspended. In this case the progress is not possible and it has to
>> wait the entire timeout.
> But isn't console_suspended set after pr_flush() call?

There should not be any printing after the suspend_console() message. If
Todd's report is coming from 5.19-rc1, then it is likely a kthread
issue, where the kthread is not respecting @console_suspended. (This
would still need to be fixed for the kthreads, but would not be relevant
for 5.19.)