linux-kernel - Re: khugepaged / firefox going wild in 3.18-rc

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Date:	Fri, 7 Nov 2014 22:07:17 +0900
From:	Norbert Preining <preining@...ic.at>
To:	Vlastimil Babka <vbabka@...e.cz>
Cc:	David Rientjes <rientjes@...gle.com>, linux-kernel@...r.kernel.org
Subject: Re: khugepaged / firefox going wild in 3.18-rc

Hi Vlastimil,

On Thu, 06 Nov 2014, Vlastimil Babka wrote:
> OK, one possibility is to do (it should apply cleanly)
> git revert e14c720efdd73c6d69cd8d07fa894bcd11fe1973

I am running with this reverted now, and I cannot reproduce the
khugepage going overboard anymore.

I tried hard since 2 days now, no chance to reproduce.
Before firefox or shotwell went into boom mode, but not now.
(For now!)

> > Again, as I mentioned, I don't have /proc/pid/stack for any "pid", is
> > this depending on some specific kerenl option?
> 
> Ah I missed that. Should be CONFIG_STACKTRACE to enable that.

If you want, I can compile a "default" kernel without the above commit
reverted, and turn on STACKTRACE (I have turned it one for *all* future
kernels I compile ;-)

I also didn't try the patch you send me, just the revert from above.

Please let me know which other experiments you want to see.

Thanks

Norbert

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PREINING, Norbert                               http://www.preining.info
JAIST, Japan                                 TeX Live & Debian Developer
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