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    SubjectRe: [PATCH 1/5] page allocator: Always wake kswapd when restarting an allocation attempt after direct reclaim failed
    On Fri, Nov 13, 2009 at 02:23:21PM +0900, KOSAKI Motohiro wrote:
    > > If a direct reclaim makes no forward progress, it considers whether it
    > > should go OOM or not. Whether OOM is triggered or not, it may retry the
    > > application afterwards. In times past, this would always wake kswapd as well
    > > but currently, kswapd is not woken up after direct reclaim fails. For order-0
    > > allocations, this makes little difference but if there is a heavy mix of
    > > higher-order allocations that direct reclaim is failing for, it might mean
    > > that kswapd is not rewoken for higher orders as much as it did previously.
    > >
    > > This patch wakes up kswapd when an allocation is being retried after a direct
    > > reclaim failure. It would be expected that kswapd is already awake, but
    > > this has the effect of telling kswapd to reclaim at the higher order as well.
    > >
    > > Signed-off-by: Mel Gorman <mel@csn.ul.ie>
    > > Reviewed-by: Christoph Lameter <cl@linux-foundation.org>
    > > Reviewed-by: Pekka Enberg <penberg@cs.helsinki.fi>
    > > Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
    >
    > Umm,
    > My mail box have the carbon copy of akpm sent this patch to linus.
    > (bellow subject and data)
    >
    > Does this have any update?
    >

    No, it doesn't. I included it in the series for the benefit of testers.

    > -----------------------------------------------------------------
    > Subject: [patch 07/35] page allocator: always wake kswapd when restarting an allocation attempt after direct reclaim failed
    > To: torvalds@linux-foundation.org
    > Cc: akpm@linux-foundation.org,
    > mel@csn.ul.ie,
    > cl@linux-foundation.org,
    > kosaki.motohiro@jp.fujitsu.com,
    > penberg@cs.helsinki.fi,
    > stable@kernel.org
    > From: akpm@linux-foundation.org
    > Date: Wed, 11 Nov 2009 14:26:14 -0800
    >
    >
    >

    --
    Mel Gorman
    Part-time Phd Student Linux Technology Center
    University of Limerick IBM Dublin Software Lab


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