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

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Date:	Wed, 5 Nov 2014 08:20:27 +0900
From:	Norbert Preining <preining@...ic.at>
To:	linux-kernel@...r.kernel.org
Subject: khugepaged / firefox going wild in 3.18-rc

Dear all,

(please Cc)

since 3.18-rc started, regularly, but unpredictably, firefox
(Debian iceweasel) goes completely boom to 100% CPU, and there
is also a kernel task khugepaged doing the same.

I need to kill firefox, or better the X session to get it back to normal.

THe logs don't show any strange output

top's top process:

27021 norbert   20   0 1351536 449868  88788 R 100.4  5.6   4:46.16 iceweasel   
   35 root      39  19       0      0      0 R 100.0  0.0   2:41.10 khugepaged  

Switching back to 3.17 does Not* exhibit the same behaviour.

Is this a bug in Firefox/Iceweasel, or is there something luring in the
kernel.


All the best

Norbert

------------------------------------------------------------------------
PREINING, Norbert                               http://www.preining.info
JAIST, Japan                                 TeX Live & Debian Developer
GPG: 0x860CDC13   fp: F7D8 A928 26E3 16A1 9FA0  ACF0 6CAC A448 860C DC13
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