linux-kernel - Re: kswapd0: excessive CPU usage

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Message-ID: <50780F26.7070007@suse.cz>
Date:	Fri, 12 Oct 2012 14:37:58 +0200
From:	Jiri Slaby <jslaby@...e.cz>
To:	Valdis.Kletnieks@...edu
CC:	Jiri Slaby <jirislaby@...il.com>, linux-mm@...ck.org,
	LKML <linux-kernel@...r.kernel.org>,
	Mel Gorman <mgorman@...e.com>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: kswapd0: excessive CPU usage

On 10/12/2012 12:08 AM, Jiri Slaby wrote:
> (It's an effective revert of "mm: vmscan: scale number of pages
> reclaimed by reclaim/compaction based on failures".)

Given kswapd had hours of runtime in ps/top output yesterday in the
morning and after the revert it's now 2 minutes in sum for the last 24h,
I would say, it's gone.

Mel, you wrote me it's unlikely the patch, but not impossible in the
end. Can you take a look, please? If you need some trace-cmd output or
anything, just let us know.

This is x86_64, 6G of RAM, no swap. FWIW EXT4, SLUB, COMPACTION all
enabled/used.

thanks,
-- 
js
suse labs
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