Re: [PATCH] mm: get rid of unnecessary overhead oftrace_mm_page_alloc_extfrag()

[Mel Gorman]

On Fri, Oct 25, 2013 at 12:42:47PM -0400, kosaki.motohiro@xxxxxxxxx wrote:
> From: KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxxxxxxx>
> 
> In general, every tracepoint should be zero overhead if it is disabled.
> However, trace_mm_page_alloc_extfrag() is one of exception. It evaluate
> "new_type == start_migratetype" even if tracepoint is disabled.
> 
> However, the code can be moved into tracepoint's TP_fast_assign() and
> TP_fast_assign exist exactly such purpose. This patch does it.
> 
> Cc: Mel Gorman <mgorman@xxxxxxx>
> Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxxxxxxx>

Acked-by: Mel Gorman <mgorman@xxxxxxx>

-- 
Mel Gorman
SUSE Labs
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