linux-kernel - Re: [PATCH] mm: Check if any page in a pageblock is reserved before marking it MIGRATE

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Message-ID: <1303488130.9308.5883.camel@nimitz>
Date:	Fri, 22 Apr 2011 09:02:10 -0700
From:	Dave Hansen <dave@...ux.vnet.ibm.com>
To:	John Stultz <john.stultz@...aro.org>
Cc:	linux-kernel@...r.kernel.org,
	Arve Hjønnevåg <arve@...roid.com>,
	Mel Gorman <mgorman@...e.de>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH] mm: Check if any page in a pageblock is reserved
 before marking it MIGRATE_RESERVE

On Thu, 2011-04-21 at 18:34 -0700, John Stultz wrote:
> This fixes a problem where the first pageblock got marked MIGRATE_RESERVE even
> though it only had a few free pages. This in turn caused no contiguous memory
> to be reserved and frequent kswapd wakeups that emptied the caches to get more
> contiguous memory.

This looks sane to me.

Acked-by: Dave Hansen <dave@...ux.vnet.ibm.com> 

-- Dave

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