Re: [PATCH 1/3] mm, compaction: export tracepoints status strings to userspace

[Vlastimil Babka]

On 08/31/2015 04:55 PM, Steven Rostedt wrote:
> On Thu, 27 Aug 2015 17:24:02 +0200
> Vlastimil Babka <vbabka@xxxxxxx> wrote:
>
> > Some compaction tracepoints convert the integer return values to strings using
> > the compaction_status_string array. This works for in-kernel printing, but not
> > userspace trace printing of raw captured trace such as via trace-cmd report.
> >
> > This patch converts the private array to appropriate tracepoint macros that
> > result in proper userspace support.
> >
> > trace-cmd output before:
> > transhuge-stres-4235  [000]   453.149280: mm_compaction_finished: node=0
> >    zone=ffffffff81815d7a order=9 ret=
> >
> > after:
> > transhuge-stres-4235  [000]   453.149280: mm_compaction_finished: node=0
> >    zone=ffffffff81815d7a order=9 ret=partial
>
> Reviewed-by: Steven Rostedt <rostedt@xxxxxxxxxxx>

Thanks!

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