linux-kernel - Re: [PATCH] printk: Add printk_flush() to force buffered text to console

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Message-ID: <1340362121.27036.227.camel@gandalf.stny.rr.com>
Date:	Fri, 22 Jun 2012 06:48:41 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Joe Perches <joe@...ches.com>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	"kay.sievers" <kay.sievers@...y.org>,
	Fengguang Wu <fengguang.wu@...el.com>,
	Ingo Molnar <mingo@...e.hu>,
	AndrewMorton <akpm@...ux-foundation.org>
Subject: Re: [PATCH] printk: Add printk_flush() to force buffered text to
 console

On Fri, 2012-06-22 at 01:24 -0700, Joe Perches wrote:
> On Thu, 2012-06-21 at 19:52 -0400, Steven Rostedt wrote:
> > Fengguang Wu had a config that caused the system to lockup. It reported:
> []
> 
> It'd have been nicer if you'd have cc'd me.

I didn't mean to be rude. I had pulled in my original patch which kept
the Cc list, and did a git --amend after making my changes and testing.
I just did a cut and paste to put back the Cc list.

> 
> What I submitted is far simpler and it allows a knob
> to control the printk buffering on a global basis.

But it did not handle the \n nor the timestamp prefix.

> 
> Did you try it?

No, because it did not do what I needed.

>   It seems to work here, but I don't
> have your other patches to rcu-torture with inserted
> printk_flush patches to verify it.  Can I have a
> copy of those please.

I just posted the places that I add it. There may be more places coming
too.

-- Steve

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