Re: khugepaged / firefox going wild in 3.18-rc

2014-11-07 Thread Vlastimil Babka
On 11/07/2014 02:57 PM, Norbert Preining wrote: > Hi Vlastimil, > > On Fri, 07 Nov 2014, Vlastimil Babka wrote: >> Great, that's good news if I understand correctly, but ... > > no "but ..." > >> I suggested the commit to you for revert 1 day ago, and you say you >> can't reproduce it for 2 days

Re: khugepaged / firefox going wild in 3.18-rc

2014-11-07 Thread Norbert Preining
Hi Vlastimil, On Fri, 07 Nov 2014, Vlastimil Babka wrote: > Great, that's good news if I understand correctly, but ... no "but ..." > I suggested the commit to you for revert 1 day ago, and you say you > can't reproduce it for 2 days already? That's a bit suspicious. Did No, you suggested it ye

Re: khugepaged / firefox going wild in 3.18-rc

2014-11-07 Thread Vlastimil Babka
On 11/07/2014 02:07 PM, Norbert Preining wrote: 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

Re: khugepaged / firefox going wild in 3.18-rc

2014-11-07 Thread Norbert Preining
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 no

Re: khugepaged / firefox going wild in 3.18-rc

2014-11-06 Thread Vlastimil Babka
On 11/06/2014 01:39 PM, Norbert Preining wrote: > Hi Vlastimil > > thanks for your answer. > > In the meantime I have tried rc3, too, with the same effects. > > Interestingly, once it goes into a bad state, every future approach > does the same. I started shotwell (photo organizer) and it went i

Re: khugepaged / firefox going wild in 3.18-rc

2014-11-06 Thread Norbert Preining
Hi Vlastimil thanks for your answer. In the meantime I have tried rc3, too, with the same effects. Interestingly, once it goes into a bad state, every future approach does the same. I started shotwell (photo organizer) and it went into the same state (khugepaged / shotwell each using about 100%

Re: khugepaged / firefox going wild in 3.18-rc

2014-11-06 Thread Vlastimil Babka
On 11/05/2014 01:20 AM, David Rientjes wrote: > On Wed, 5 Nov 2014, Norbert Preining wrote: > >> Hi David, >> >> one more thing, attached dmesg output with some page faults, >> maybe this is connected? >> > > Hmm, I'm not aware of any mm->mmap_sem starvation issues in 3.18-rc, maybe > this is

Re: khugepaged / firefox going wild in 3.18-rc

2014-11-04 Thread David Rientjes
On Wed, 5 Nov 2014, Norbert Preining wrote: > Hi David, > > one more thing, attached dmesg output with some page faults, > maybe this is connected? > Hmm, I'm not aware of any mm->mmap_sem starvation issues in 3.18-rc, maybe this is a duplicate of another issue that someone has reported that I

Re: khugepaged / firefox going wild in 3.18-rc

2014-11-04 Thread Norbert Preining
Hi David, one more thing, attached dmesg output with some page faults, maybe this is connected? On Wed, 05 Nov 2014, Norbert Preining wrote: > Hi David, > > thanks for your answer. > > On Tue, 04 Nov 2014, David Rientjes wrote: > > If you have the ability to kill your X session, then you presum

Re: khugepaged / firefox going wild in 3.18-rc

2014-11-04 Thread Norbert Preining
Hi David, thanks for your answer. On Tue, 04 Nov 2014, David Rientjes wrote: > If you have the ability to kill your X session, then you presumably are > able to capture /proc/pid/stack for these pids to see where it is busy. Yes I can do that, I can even reproduce it on *every* start of icewe

Re: khugepaged / firefox going wild in 3.18-rc

2014-11-04 Thread David Rientjes
On Wed, 5 Nov 2014, Norbert Preining wrote: > 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