linux-kernel - Re: [RFC][PATCH 2/3] perf: Take a hot regs snapshot for trace events

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, 4 Mar 2010 22:17:41 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	Peter Zijlstra <peterz@...radead.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	Paul Mackerras <paulus@...ba.org>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Greg KH <greg@...ah.com>
Subject: Re: [RFC][PATCH 2/3] perf: Take a hot regs snapshot for trace events


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

> On Thu, 2010-03-04 at 16:36 +0100, Ingo Molnar wrote:
> 
> > > This should be done anyway. But it would also let you decouple ftrace trace 
> > > events from perf trace events but still let the two use the same trace 
> > > points.
> > 
> > I think the main thing would be to have a decoupled /eventfs - basically 
> > /debug/tracing/events/ moved to "/eventfs" or maybe to "/proc/events/". This 
> > would make them available more widely, and in a standardized way.
> 
> I know Greg once proposed a /tracefs directory. I don't really care how 
> things work as long as we don't lose functionality. Perhaps we should have a 
> standard tracefs dir, and have:

No, we want to decouple it from 'tracing'. It's events, not tracing. Events 
are more broader, they can be used for RAS, profiling, counting, etc. - not 
just tracing.

Furthermore, we only want /debug/tracing/events really, not the various 
dynamic ftrace controls - those could remain in /debug/tracing/.

Thanks,

	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/