linux-kernel - Re: [PATCH 1/6] mm: pagemap: Avoid unnecessary overhead when tracepoints are deactivated

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Message-ID: <20140710120120.GI29639@cmpxchg.org>
Date:	Thu, 10 Jul 2014 08:01:20 -0400
From:	Johannes Weiner <hannes@...xchg.org>
To:	Mel Gorman <mgorman@...e.de>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	Linux-MM <linux-mm@...ck.org>,
	Linux-FSDevel <linux-fsdevel@...r.kernel.org>
Subject: Re: [PATCH 1/6] mm: pagemap: Avoid unnecessary overhead when
 tracepoints are deactivated

On Wed, Jul 09, 2014 at 09:13:03AM +0100, Mel Gorman wrote:
> The LRU insertion and activate tracepoints take PFN as a parameter forcing
> the overhead to the caller.  Move the overhead to the tracepoint fast-assign
> method to ensure the cost is only incurred when the tracepoint is active.
> 
> Signed-off-by: Mel Gorman <mgorman@...e.de>

Acked-by: Johannes Weiner <hannes@...xchg.org>
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