linux-kernel - Re: [RFA][PATCH 1/5] ftrace/x86: Run a sync after fixup on failure

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Date:	Mon, 3 Mar 2014 17:31:08 -0500
From:	Steven Rostedt <rostedt@...dmis.org>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
	Petr Mladek <pmladek@...e.cz>, stable@...r.kernel.org
Subject: Re: [RFA][PATCH 1/5] ftrace/x86: Run a sync after fixup on failure

On Mon, 03 Mar 2014 14:27:09 -0800
"H. Peter Anvin" <hpa@...or.com> wrote:

> On 03/03/2014 02:18 PM, Steven Rostedt wrote:
> > 
> > How's this sound:
> > 
> > The second bug was that the removal of the breakpoints required the
> > "within()" logic updates instead of accessing the ip address directly.
> > As kernel text is mapped read-only when CONFIG_DEBUG_RODATA is set, and
> > the removal of the breakpoint is a modification of kernel text.
> > 
> 
> I'd add:
> 
> "ftrace_write() includes this, but probe_kernel_write() does not."
> 

OK, thanks,

-- Steve
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