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Date: Mon, 03 Mar 2014 14:27:09 -0800
From: "H. Peter Anvin" <hpa@...or.com>
To: Steven Rostedt <rostedt@...dmis.org>
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 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."
-hpa
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