Re: kswapd craziness in 3.7

From: Bruno Wolff III
Date: Tue Dec 04 2012 - 22:02:36 EST

On Tue, Dec 04, 2012 at 16:42:10 -0500,
Johannes Weiner <hannes@xxxxxxxxxxx> wrote:
for over 24hours with no evidence of problems with kswapd"

Now waiting for results from Jiri, Zdenek and Bruno...

I have been running 3.7.0-0.rc7.git1.2.van.main.knurd.kswap.4.fc18.i686.PAE a bit over 23 hours and kswapd has accumalated one minute 8 seconds of CPU time. I did several yum operations during that time and didn't see kswapd spike to 90+% CPU usage as I had seen in the past. With some kernels I wasn't reliably triggering the kswapd issue, so it may not be long enough to know for sure that the problem is fixed.

I also should note that when I tried 3.7.0-0.rc7.git3.2.fc19.i686.PAE I did see problems with kswapd hitting 90+% usage of a CPU.
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