linux-kernel - Re: [PATCH 00/10] ftrace: Add register_ftrace

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Message-ID: <20191114093644.5c183b1d@gandalf.local.home>
Date:   Thu, 14 Nov 2019 09:36:44 -0500
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Miroslav Benes <mbenes@...e.cz>
Cc:     linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        X86 ML <x86@...nel.org>, Nadav Amit <nadav.amit@...il.com>,
        Andy Lutomirski <luto@...nel.org>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Song Liu <songliubraving@...com>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Daniel Bristot de Oliveira <bristot@...hat.com>,
        Alexei Starovoitov <alexei.starovoitov@...il.com>,
        Josh Poimboeuf <jpoimboe@...hat.com>
Subject: Re: [PATCH 00/10] ftrace: Add register_ftrace_direct()

On Thu, 14 Nov 2019 10:05:42 +0100 (CET)
Miroslav Benes <mbenes@...e.cz> wrote:

> On Wed, 13 Nov 2019, Steven Rostedt wrote:
> 
> > On Wed, 13 Nov 2019 16:10:36 +0100 (CET)
> > Miroslav Benes <mbenes@...e.cz> wrote:
> >   
> > > So I tried to run the selftests and ran into the same timeout issue we had 
> > > with live patching :/
> > > 
> > > See http://lkml.kernel.org/r/20191025115041.23186-1-mbenes@suse.cz for a possible solution.  
> > 
> > Is this when you run the all the selftests?  
> 
> Yes, when I run all ftrace selftests (make run_tests in 
> tools/testing/selftests/ftrace/).

Thanks, I added this:

>From 6105e34804bc3a9a35e8c10fcd9e10b8b5a22f8e Mon Sep 17 00:00:00 2001
From: "Steven Rostedt (VMware)" <rostedt@...dmis.org>
Date: Wed, 13 Nov 2019 11:48:39 -0500
Subject: [PATCH] tracing/selftests: Turn off timeout setting

As the ftrace selftests can run for a long period of time, disable the
timeout that the general selftests have. If a selftest hangs, then it
probably means the machine will hang too.

Link: https://lore.kernel.org/r/alpine.LSU.2.21.1911131604170.18679@pobox.suse.cz

Suggested-by: Miroslav Benes <mbenes@...e.cz>
Signed-off-by: Steven Rostedt (VMware) <rostedt@...dmis.org>
---
 tools/testing/selftests/ftrace/settings | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 tools/testing/selftests/ftrace/settings

diff --git a/tools/testing/selftests/ftrace/settings b/tools/testing/selftests/ftrace/settings
new file mode 100644
index 000000000000..e7b9417537fb
--- /dev/null
+++ b/tools/testing/selftests/ftrace/settings
@@ -0,0 +1 @@
+timeout=0
-- 
2.20.1


-- Steve