linux-kernel - Re: [PATCH 1/1] ftrace: do not update max buffer with no users

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 for Android: free password hash cracker in your pocket

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

Date:	Thu, 13 Nov 2008 09:36:16 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
	Pekka Paalanen <pq@....fi>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Steven Rostedt <srostedt@...hat.com>
Subject: Re: [PATCH 1/1] ftrace: do not update max buffer with no users


* Steven Rostedt <rostedt@...dmis.org> wrote:

> 
> On Wed, 12 Nov 2008, Andrew Morton wrote:
> > This sort of thing:
> > 
> > +#ifdef CONFIG_TRACER_MAX_TRACE
> >  	if (current_trace && current_trace->print_max)
> >  		iter->tr = &max_tr;
> >  	else
> > +#endif
> >  		iter->tr = inode->i_private;
> > 
> > is particularly regrettable.
> 
> Yeah, I know it is particularly ugly :-(
> 
> I was hoping to spend some time to find a way to clean it up. The 
> other answer is to just scrap the config all together, and let the 
> unused max latency tracer buffer be allocated and take up space 
> (with no users).

Correct. That would also result in a smaller patch for .28, right?

	Ingo
--
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/