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From: Nathan Chancellor <natechancellor@gmail.com>
To: Thomas Gleixner <tglx@linutronix.de>
Cc: Kees Cook <keescook@chromium.org>,
	Peter Zijlstra <peterz@infradead.org>,
	Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>,
	"Gustavo A. R. Silva" <gustavo@embeddedor.com>,
	Joe Perches <joe@perches.com>, Ingo Molnar <mingo@redhat.com>,
	Arnaldo Carvalho de Melo <acme@kernel.org>,
	Alexander Shishkin <alexander.shishkin@linux.intel.com>,
	Jiri Olsa <jolsa@redhat.com>, Namhyung Kim <namhyung@kernel.org>,
	Borislav Petkov <bp@alien8.de>, "H. Peter Anvin" <hpa@zytor.com>,
	"maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)"
	<x86@kernel.org>, Kan Liang <kan.liang@linux.intel.com>,
	linux-kernel <linux-kernel@vger.kernel.org>,
	Shawn Landden <shawn@git.icu>,
	clang-built-linux@googlegroups.com,
	Josh Poimboeuf <jpoimboe@redhat.com>
Subject: Re: [PATCH] perf/x86/intel: Mark expected switch fall-throughs
Date: Wed, 26 Jun 2019 13:03:06 -0700	[thread overview]
Message-ID: <20190626200306.GA72437@archlinux-epyc> (raw)
In-Reply-To: <alpine.DEB.2.21.1906262140570.32342@nanos.tec.linutronix.de>

On Wed, Jun 26, 2019 at 09:46:02PM +0200, Thomas Gleixner wrote:
> On Wed, 26 Jun 2019, Nathan Chancellor wrote:
> > On Wed, Jun 26, 2019 at 05:18:37PM +0200, Thomas Gleixner wrote:
> > > tarball with log and the preprocessed source and run scripts:
> > > 
> > >     https://tglx.de/~tglx/tc-crash.tar.bz2
> > > 
> > > The machine runs up to date debian stretch which has backports enabled and
> > > I just used the install command from the github project page you linked
> > > to. Getting started section.
> > > 
> > Great, thank you! It explodes during lowering, which is a backend issue
> > so that's fun :/
> > 
> > My guess is that this is a problem with -march=native on that version of
> > LLVM (since a newer one works). Could you try this patch that makes that
> > opt-in and see if that fixes it?
> > 
> > https://github.com/nathanchance/tc-build/commit/9f1ae41cd4246f9e4d011542f094aa0df2c069b4
> 
> clang --version
> clang version 3.8.1-24 (tags/RELEASE_381/final)
> Target: x86_64-pc-linux-gnu
> Thread model: posix
> InstalledDir: /usr/bin
> 
> ./build-llvm.py
> ...
> LLVM build duration: 0:03:14
> 
> Tested-by: Thomas Gleixner <tglx@linutronix.de>

Fantastic, thank you!

https://github.com/ClangBuiltLinux/tc-build/pull/19

Should be merged soon hopefully.

Cheers,
Nathan

  reply	other threads:[~2019-06-26 20:03 UTC|newest]

Thread overview: 52+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-06-24 16:19 [PATCH] perf/x86/intel: Mark expected switch fall-throughs Gustavo A. R. Silva
2019-06-24 19:31 ` Peter Zijlstra
2019-06-24 19:45   ` Joe Perches
2019-06-24 20:37     ` Peter Zijlstra
2019-06-24 20:53       ` Gustavo A. R. Silva
2019-06-24 20:57         ` Joe Perches
2019-06-25  7:20           ` Peter Zijlstra
2019-06-24 22:28         ` Miguel Ojeda
2019-06-25  7:18           ` Peter Zijlstra
2019-06-25 12:47             ` Miguel Ojeda
2019-06-25 18:15               ` Nick Desaulniers
2019-06-25 22:29                 ` Joe Perches
2019-06-25 22:57                   ` Nick Desaulniers
2019-06-25 23:25                     ` Joe Perches
2019-06-26  8:49                 ` Peter Zijlstra
2019-06-26 22:14                   ` Nick Desaulniers
2019-06-27  7:12                     ` Peter Zijlstra
2019-06-28 13:31                       ` Peter Zijlstra
2019-06-28 18:44                         ` Nick Desaulniers
2019-06-29  7:10                           ` Peter Zijlstra
2019-06-25 17:12             ` Kees Cook
2019-06-25 18:05               ` Nathan Chancellor
2019-06-25 19:53                 ` Thomas Gleixner
2019-06-25 20:27                   ` Nathan Chancellor
2019-06-25 20:37                     ` Nick Desaulniers
2019-06-25 21:47                     ` Thomas Gleixner
2019-06-26  5:10                       ` Nathan Chancellor
2019-06-26 15:18                         ` Thomas Gleixner
2019-06-26 19:00                           ` Nathan Chancellor
2019-06-26 19:46                             ` Thomas Gleixner
2019-06-26 20:03                               ` Nathan Chancellor [this message]
2019-06-26  9:24                       ` Peter Zijlstra
2019-06-26  9:55                         ` Peter Zijlstra
2019-06-26 22:23                           ` Nick Desaulniers
2019-06-27  7:35                             ` Peter Zijlstra
2019-06-26 10:43                         ` Peter Zijlstra
2019-06-26 22:15                         ` Nick Desaulniers
2019-06-27  7:16                           ` Peter Zijlstra
2019-06-26 16:30                       ` Peter Zijlstra
2019-06-26 22:33                         ` Nick Desaulniers
2019-06-26 23:11                           ` Thomas Gleixner
2019-06-27  7:11                           ` Peter Zijlstra
2019-06-25 23:46                     ` Arnaldo Carvalho de Melo
2019-06-26  5:14                       ` Nathan Chancellor
2019-06-25 20:09                 ` Kees Cook
2019-06-26  8:06               ` Peter Zijlstra
2019-06-25  7:15         ` Peter Zijlstra
2019-07-25 16:27 ` [tip:perf/urgent] " tip-bot for Gustavo A. R. Silva
2019-07-25 17:06   ` Borislav Petkov
2019-07-25 17:35     ` Peter Zijlstra
2019-07-25 23:18       ` Joe Perches
2019-07-25 23:28         ` Kees Cook

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