Re: [PATCH 3/6] mm: kswapd: Use the order that kswapd wasreclaiming at for sleeping_prematurely()

[KAMEZAWA Hiroyuki]

On Thu,  9 Dec 2010 11:18:17 +0000
Mel Gorman <mel@xxxxxxxxx> wrote:

> Before kswapd goes to sleep, it uses sleeping_prematurely() to check if
> there was a race pushing a zone below its watermark. If the race
> happened, it stays awake. However, balance_pgdat() can decide to reclaim
> at a lower order if it decides that high-order reclaim is not working as
> expected. This information is not passed back to sleeping_prematurely().
> The impact is that kswapd remains awake reclaiming pages long after it
> should have gone to sleep. This patch passes the adjusted order to
> sleeping_prematurely and uses the same logic as balance_pgdat to decide
> if it's ok to go to sleep.
> 
> Signed-off-by: Mel Gorman <mel@xxxxxxxxx>
Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/