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Message-ID: <20100102035644.GC5238@nowhere> Date: Sat, 2 Jan 2010 04:56:46 +0100 From: Frederic Weisbecker <fweisbec@...il.com> To: Peter Zijlstra <peterz@...radead.org> Cc: Mike Galbraith <efault@....de>, Lin Ming <ming.m.lin@...el.com>, mingo@...e.hu, tglx@...utronix.de, linux-kernel <linux-kernel@...r.kernel.org>, "Zhang, Yanmin" <yanmin_zhang@...ux.intel.com> Subject: Re: tbench regression with 2.6.33-rc1 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. -- 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/
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