Re: [Bug 199003] console stalled, cause Hard LOCKUP.

[Sergey Senozhatsky]

Cc-ing the kernel list and printk people.

Wen Yang, any chance we can switch to email? Bugzilla is not very handful.


On (03/26/18 02:40), bugzilla-daemon@xxxxxxxxxxxxxxxxxxx wrote:
> https://bugzilla.kernel.org/show_bug.cgi?id=199003
> 
> --- Comment #11 from Wen Yang (wen.yang99@xxxxxxxxxx) ---
> Hello Steven,
> 
> +module_param_named(synchronous, printk_sync, bool, S_IRUGO);
> +MODULE_PARM_DESC(synchronous, "make printing to console synchronous");
> 
> It's depend on this kernel parameter(printk.synchronous), but this parameter is
> readonly.
> So we must change grub files, and alse need to restart the server for changes
> to take effect.
> If we can configure it dynamically, it will be more useful.

So you are testing printk_kthread now, right? May I ask why?
Did Steven's patch help?

	-ss