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SubjectRe: [Bug 199003] console stalled, cause Hard LOCKUP.
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@bugzilla.kernel.org wrote:
> https://bugzilla.kernel.org/show_bug.cgi?id=199003
>
> --- Comment #11 from Wen Yang (wen.yang99@zte.com.cn) ---
> 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

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