linux-kernel - Re: 2.6.38 sbrk regression

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Message-ID: <20110413172127.GB5734@random.random>
Date:	Wed, 13 Apr 2011 19:21:27 +0200
From:	Andrea Arcangeli <aarcange@...hat.com>
To:	raz ben yehuda <raziebe@...il.com>
Cc:	lkml <linux-kernel@...r.kernel.org>, riel@...hat.com,
	kosaki.motohiro@...fujitsu.com, akpm@...ux-foundation.org,
	Mel Gorman <mel@....ul.ie>
Subject: Re: 2.6.38 sbrk regression

On Wed, Apr 13, 2011 at 05:06:19PM +0300, raz ben yehuda wrote:
> ok, managed to build 38-rc3 ( keep forgetting make mrproper ).
> problem is still there:

Oops I thought it was typo on your prev email so I didn't answer
assuming you would test 39-rc like I suggested in my prev email, I
really meant 2.6.39-rc3.

The fix I refer to is d527caf22e48480b102c7c6ee5b9ba12170148f7 and
it's included in >= 2.6.39-rc1. 38-rc3 has THP but not this
changeset. We tried to push it for 38 final but it was a bit late so
it got merged immediately in 39-rc1 to stay on the safe side (it's
only a performance issue and the other longstanding irq/sched latency
issues in compaction that got fixed in 39-rc1 where actually more
relevant than the compaction-kswapd removal).
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