linux-kernel - Re: [RFC][PATCH v4 1/2] printk: Make printk() completely async

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Date:	Wed, 16 Mar 2016 11:31:13 +0900
From:	Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>
To:	Byungchul Park <byungchul.park@....com>
Cc:	Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>,
	Petr Mladek <pmladek@...e.com>,
	Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Jan Kara <jack@...e.com>, Tejun Heo <tj@...nel.org>,
	Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>,
	linux-kernel@...r.kernel.org, Jan Kara <jack@...e.cz>
Subject: Re: [RFC][PATCH v4 1/2] printk: Make printk() completely async

On (03/16/16 11:10), Byungchul Park wrote:
> > > What about this?
> > > 
> > > int need_flush_console;
> > > 
> > > 	while(1) {
> > > 		set_current_state(TASK_INTERRUPTIBLE);
> > > 		if (!need_flush_console)
> > > 			schedule();
> 
>                 else // This shoule be here, IMHO. Hm?

do __set_current_state(TASK_RUNNING) only if need_flush_console == true?
why? I see no problems with Petr's code.

> > > 		__set_current_state(TASK_RUNNING);
> > > 
> > > 		need_flush_console =  false;
> > > 
> > > > +		console_lock();
> > > > +		console_unlock();
> > > > +	}

	-ss