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SubjectRe: [PATCH 3/6] tracing, page-allocator: Add trace event for page traffic related to the buddy lists

* Ingo Molnar <mingo@elte.hu> wrote:

>
> * Mel Gorman <mel@csn.ul.ie> wrote:
>
> > +TRACE_EVENT(mm_page_pcpu_drain,
> > +
> > + TP_PROTO(struct page *page, int order, int migratetype),
> > +
> > + TP_ARGS(page, order, migratetype),
> > +
> > + TP_STRUCT__entry(
> > + __field( struct page *, page )
> > + __field( int, order )
> > + __field( int, migratetype )
> > + ),
> > +
> > + TP_fast_assign(
> > + __entry->page = page;
> > + __entry->order = order;
> > + __entry->migratetype = migratetype;
> > + ),
> > +
> > + TP_printk("page=%p pfn=%lu order=%d cpu=%d migratetype=%d",
> > + __entry->page,
> > + page_to_pfn(__entry->page),
> > + __entry->order,
> > + smp_processor_id(),
> > + __entry->migratetype)
>
> > + trace_mm_page_alloc_zone_locked(page, order, migratetype, order == 0);
>
> This can be optimized further by omitting the migratetype field and
> adding something like this:

erm, cut & pasted the wrong thing, i meant:

s/migratetype/percpu_refill

Ingo


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