On 2022-07-10, Andy Shevchenko <andy.shevchenko@xxxxxxxxx> wrote: >> Looking at freeze-5.19.0-rc1-bad.html, at 3431.221039 we see that >> suspend_console() was called. The additional 1-second delay you are >> referring to would be 3432.436187, where serial is >> suspended. pr_flush() would have been satisfied when the message at >> 3431.221039 was printed. So the question is, why is there still >> printing going on? > > It might be no_console_suspend hack. Are you, btw, aware of this ugly > hack in the kernel? I am aware of it. There are some cases where it actually works. But it is not being used here. The boot args are: BOOT_IMAGE=/boot/vmlinuz-5.19.0-rc1+ root=UUID=1dfec046-baf6-4f38-8b5e-a8f438a48038 ro rw quiet console=ttyS0,115200 console=tty0 i915.enable_psr=1 initcall_debug log_buf_len=32M quiet splash console=tty0 console=ttyS0,115200n8 vt.handoff=7 I am curious if Todd sees this problem with 5.19-rc4 or later (the kthread printers were removed). John
