From: Frederic Weisbecker <fweisbec@gmail.com>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Mike Galbraith <efault@gmx.de>, Lin Ming <ming.m.lin@intel.com>,
mingo@elte.hu, tglx@linutronix.de,
linux-kernel <linux-kernel@vger.kernel.org>,
"Zhang, Yanmin" <yanmin_zhang@linux.intel.com>
Subject: Re: tbench regression with 2.6.33-rc1
Date: Sat, 2 Jan 2010 04:56:46 +0100 [thread overview]
Message-ID: <20100102035644.GC5238@nowhere> (raw)
In-Reply-To: <1261908662.15854.4.camel@laptop>
On Sun, Dec 27, 2009 at 11:11:02AM +0100, Peter Zijlstra wrote:
> On Sun, 2009-12-27 at 10:41 +0100, Mike Galbraith wrote:
> > On Sun, 2009-12-27 at 09:59 +0100, Peter Zijlstra wrote:
> > > On Sun, 2009-12-27 at 09:32 +0100, Mike Galbraith wrote:
> > > > Perf also isn't free, and in 33, we lost the ability to config it out,
> > >
> > > Uhm, that's a plain bug, we should be able to build a kernel without
> > > perf support, does the hw breakpoint support have an unfortunate select
> > > some place or something?
> >
> > Yeah, it's selected in arch/x86/Kconfig. The kernel won't build without
> > it either.
>
> Came from this :/
>
> Any way we can fix this? Frederic/Ingo?
No way I think.
breakpoints support by ptrace is a builtin option in x86 and
it's implemented on top of perf.
The only solution to solve this would be to make the breakpoints
support optional.
next prev parent reply other threads:[~2010-01-02 3:56 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-12-25 11:11 tbench regression with 2.6.33-rc1 Lin Ming
2009-12-27 8:32 ` Mike Galbraith
2009-12-27 8:59 ` Peter Zijlstra
2009-12-27 9:41 ` Mike Galbraith
2009-12-27 10:11 ` Peter Zijlstra
2010-01-02 3:56 ` Frederic Weisbecker [this message]
2009-12-29 2:09 ` Lin Ming
2009-12-29 5:24 ` Mike Galbraith
2009-12-29 5:19 ` Lin Ming
2009-12-29 5:49 ` Mike Galbraith
2010-01-06 6:01 ` Mike Galbraith
2010-01-06 5:55 ` Lin Ming
2010-01-06 6:52 ` Lin Ming
2010-01-06 7:44 ` Mike Galbraith
2010-01-11 12:08 ` Peter Zijlstra
2010-01-11 16:16 ` Mike Galbraith
2010-01-12 1:09 ` Lin Ming
2010-01-12 2:33 ` Mike Galbraith
2010-01-12 3:13 ` Lin Ming
2010-01-12 4:14 ` Mike Galbraith
2010-01-12 8:54 ` Peter Zijlstra
2010-01-12 9:20 ` Lin Ming
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