linux-kernel - Re: [PATCH] Revert "mm: remove __GFP_NO

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Message-ID: <20121120161315.GA8338@wolff.to>
Date:	Tue, 20 Nov 2012 10:13:15 -0600
From:	Bruno Wolff III <bruno@...ff.to>
To:	Josh Boyer <jwboyer@...il.com>
Cc:	Mel Gorman <mgorman@...e.de>, Zdenek Kabelac <zkabelac@...hat.com>,
	Seth Jennings <sjenning@...ux.vnet.ibm.com>,
	Jiri Slaby <jslaby@...e.cz>, Valdis.Kletnieks@...edu,
	Jiri Slaby <jirislaby@...il.com>, linux-mm@...ck.org,
	LKML <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Rik van Riel <riel@...hat.com>,
	Robert Jennings <rcj@...ux.vnet.ibm.com>,
	Thorsten Leemhuis <fedora@...mhuis.info>
Subject: Re: [PATCH] Revert "mm: remove __GFP_NO_KSWAPD"

On Tue, Nov 20, 2012 at 10:38:45 -0500,
   Josh Boyer <jwboyer@...il.com> wrote:
>
>We've been tracking it in https://bugzilla.redhat.com/show_bug.cgi?id=866988
>and people say this revert patch doesn't seem to make the issue go away
>fully.  Thorsten has created another kernel with the other patch applied
>for testing.
>
>At least I think that is the latest status from the bug.  Hopefully the
>commenters will chime in.

I am seeing kswapd0 hogging a cpu right now. I have two rsyncs and an md sync 
running and a couple of large memory processes (java and firefox) idle.

I haven't been seeing this happen as often as previously. Before doing a 
yum update with an rsync was pretty good at triggering the problem. Now, 
not so much.
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