Messages in this thread | | | Date | Mon, 12 Nov 2012 14:13:20 +0100 | From | Zdenek Kabelac <> | Subject | Re: kswapd0: excessive CPU usage |
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Dne 12.11.2012 13:19, Mel Gorman napsal(a): > On Sun, Nov 11, 2012 at 10:13:14AM +0100, Zdenek Kabelac wrote: >> Hmm, so it's just took longer to hit the problem and observe kswapd0 >> spinning on my CPU again - it's not as endless like before - but >> still it easily eats minutes - it helps to turn off Firefox or TB >> (memory hungry apps) so kswapd0 stops soon - and restart those apps >> again. >> (And I still have like >1GB of cached memory) >> > > I posted a "safe" patch that I believe explains why you are seeing what > you are seeing. It does mean that there will still be some stalls due to > THP because kswapd is not helping and it's avoiding the problem rather > than trying to deal with it. > > Hence, I'm also going to post this patch even though I have not tested > it myself. If you find it fixes the problem then it would be a > preferable patch to the revert. It still is the case that the > balance_pgdat() logic is in sort need of a rethink as it's pretty > twisted right now. >
Should I apply them all together for 3.7-rc5 ?
1) https://lkml.org/lkml/2012/11/5/308 2) https://lkml.org/lkml/2012/11/12/113 3) https://lkml.org/lkml/2012/11/12/151
Zdenek
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