linux-kernel - Re: ftrace 'failed to modify' bug when loading reiserfs.ko

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Message-ID: <20130906014859.GB10073@redhat.com>
Date:	Thu, 5 Sep 2013 21:48:59 -0400
From:	Dave Jones <davej@...hat.com>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: ftrace 'failed to modify' bug when loading reiserfs.ko

On Thu, Sep 05, 2013 at 09:44:55PM -0400, Steven Rostedt wrote:
 > On Thu, 5 Sep 2013 21:34:55 -0400
 > Dave Jones <davej@...hat.com> wrote:
 > 
 > > On Thu, Sep 05, 2013 at 09:28:34PM -0400, Steven Rostedt wrote:
 > >  > On Thu, 5 Sep 2013 21:19:24 -0400
 > >  > Dave Jones <davej@...hat.com> wrote:
 > >  > 
 > >  > > For whatever dumb reason, when running 'make install' on a Fedora system,
 > >  > > os-prober tries to figure out what filesystems are needed by loading filesystems,
 > >  > > and seeing what sticks..  Today it blew up spectacularly when it got to
 > >  > > loading reiserfs..  System wedged entirely afterwards.
 > >  > 
 > >  > Could it be that the reiserfs module was compiled differently than the
 > >  > running kernel?
 > >  
 > > ohhhh... it was probably installing the just-built version over the same '3.11+'
 > > modules tree that was running.  This has never been a problem before though..
 > > 
 > 
 > Did you change a config option, or update your gcc?

Yeah, changed CONFIG_DEBUG_KOBJECT, which rebuilt the world.

	Dave
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