linux-kernel - Re: [PATCH] tracing: Cleanup the convoluted softirq tracepoints

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:	Thu, 21 Oct 2010 21:56:31 +0200 (CEST)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Steven Rostedt <rostedt@...dmis.org>
cc:	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
	Koki Sanagi <sanagi.koki@...fujitsu.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...e.hu>,
	Frederic Weisbecker <fweisbec@...il.com>,
	nhorman@...driver.com, scott.a.mcmillan@...el.com,
	laijs@...fujitsu.com, "H. Peter Anvin" <hpa@...or.com>,
	LKML <linux-kernel@...r.kernel.org>, eric.dumazet@...il.com,
	kaneshige.kenji@...fujitsu.com, David Miller <davem@...emloft.net>,
	izumi.taku@...fujitsu.com, kosaki.motohiro@...fujitsu.com,
	Heiko Carstens <heiko.carstens@...ibm.com>,
	"Luck, Tony" <tony.luck@...el.com>
Subject: Re: [PATCH] tracing: Cleanup the convoluted softirq tracepoints

On Thu, 21 Oct 2010, Steven Rostedt wrote:

> On Thu, 2010-10-21 at 18:18 +0200, Thomas Gleixner wrote:
> > 
> > On Tue, 19 Oct 2010, Steven Rostedt wrote:
> > 
> > > On Wed, 2010-10-20 at 00:04 +0200, Thomas Gleixner wrote:
> > > 
> > > > hpa just posted code which does the _RIGHT_ _THING_ independent of any
> > > > compiler madness and you tracer folks just missed it.
> > > 
> > > Thomas,
> > > 
> > > Can you try this patch and see if it makes the object code better?
> > 
> > Nope, same result.
> 
> Yeah, I figured. Do you have CC_OPTIMIZE_FOR_SIZE set? And if you do,
> what happens if you disable it?

Hmm. Indeed. That gets rid of the double jump.

Thanks,

	tglx
--
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/