Re: [RFC][PATCH 7/7] printk: new printk() recursion detection

[Sergey Senozhatsky]

On (09/29/16 15:19), Petr Mladek wrote:
> I am sorry but I do not understand this much. printk() should set the
> alternative implementation in the critical section by default.
> Why do we need to handle this so specially?
> 
> Is it because of flushing in NMI context when panicing? I would call
> vprintk_emit() directly from the flush_line() function in this case.
> Then all other possible error printk's will get redirected to the
> NMI buffer which is good enouh.

I'm going to re-do the entire thing. I had some cases in mind, like
WARN from vsnprintf from printk from alt_printk_flushing from panic.
or something like this. perhaps too complicated, will re-think it.

	-ss