linux-kernel - Re: [PATCH v3] printk: Have printk() never buffer its data

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Fri, 29 Jun 2012 07:18:38 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:	Kay Sievers <kay@...y.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>, Ingo Molnar <mingo@...e.hu>,
	Wu Fengguang <fengguang.wu@...el.com>,
	Joe Perches <joe@...ches.com>,
	"Paul E. McKenney" <paulmck@...ibm.com>
Subject: Re: [PATCH v3] printk: Have printk() never buffer its data

On Fri, 2012-06-29 at 01:30 -0400, Greg Kroah-Hartman wrote:
>  
> > I wonder if it would be better to do the following for the above two
> > ifs:
> > 
> > 	if (cont.len && cont.owner == current) {
> > 		if (!prefix)
> > 			stored = cont_add(facility, level, text, text_len);
> > 		cont_flush();
> > 	}
> > 
> > If the prefix was true, then the cont.flush would be set when cont_add()
> > is called, and the first thing that cont_add() does:
> > 
> > 	if (cont.len && cont.flushed)
> > 		return false;
> > 
> > which would always be true (returning false) if prefix was set.
> > 
> > And the second cont_flush() is a nop due to it doing:
> > 
> > 	if (cont.flushed)
> > 		return;
> 
> It might be "better", and this would be a nice optimization, but is it
> needed right now?  In other words, I'd like to get this patch into
> linux-next soon to get testing to get to Linus before 3.5-final comes
> out, don't you?

Sure, pull it as is, and you can add my Tested-by, and Acked-by tags
(Steven Rostedt <rostedt@...dmis.org>).

I'll send you a patch to do this update that you can queue for 3.6.
OK?

-- Steve


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/