Re: pipe/page fault oddness.

[Linus Torvalds]

On Tue, Sep 30, 2014 at 9:40 AM, Dave Jones <davej@xxxxxxxxxx> wrote:
>
> ah, echo 0 > tracing_on isn't enough, I had to 0 out set_ftrace_pid too.
> Never mind.  Subsequent traces all looking the same, minus the tracing
> junk though.

Yeah, looks like that copy_page_to_iter+0x3b3 is always there.

> Is there some way I can figure out what address it's faulting on ?
> I wonder if that might give some clues.

Could be useful. There's a trace_page_fault_kernel() entry that should
give it to you, along with error code.

            Linus
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