Date: Sun, 9 Sep 2012 07:20:14 GMT From: Mark Johnston <markjdb@gmail.com> To: freebsd-bugs@FreeBSD.org Subject: Re: kern/170627: Kernel memory leak when polling cpu temperature via coretemp kernel module.] Message-ID: <201209090720.q897KEv8063960@freefall.freebsd.org>
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The following reply was made to PR kern/170627; it has been noted by GNATS.
From: Mark Johnston <markjdb@gmail.com>
To: bug-followup@freebsd.org
Cc:
Subject: Re: kern/170627: Kernel memory leak when polling cpu temperature via
coretemp kernel module.]
Date: Sun, 9 Sep 2012 03:17:31 -0400
Forwarding so that this gets logged. The PR can be closed.
----- Forwarded message from Remme <adscomplex@gmail.com> -----
Date: Sun, 9 Sep 2012 09:39:01 +0300
From: Remme <adscomplex@gmail.com>
To: Mark Johnston <markjdb@gmail.com>
Subject: Re: kern/170627: Kernel memory leak when polling cpu temperature via coretemp kernel module.
Hi Mark,
Please cancel this report.
Sorry for taking your time - but at the first sight coretemp was the reason.
(Module unload fixed a problem - but only for a first 12-24 hours.).
The reason for panic was a sphinxsearch (searchd).
At this moment we are downgraded it to 0.9.9 and this seems solved a kernel
panic problem.
But we still have a growing active memory issue.
Thank you for your time and attention.
WBR,
Max.
On Sun, Sep 9, 2012 at 2:16 AM, Mark Johnston <markjdb@gmail.com> wrote:
> Hi Max,
>
> Why do you think that coretemp is causing the memory leak? As far as I
> can see, polling the coretemp sysctls shouldn't cause any memory to be
> allocated at all - coretemp basically just reads a bunch of MSRs. Just
> for fun, I tried running something like
>
> while true; do
> for n in $(jot - 0 $(sysctl -n hw.ncpu)); do
> sysctl -q dev.cpu.${n}.temperature >/dev/null 2>&1
> sysctl -q dev.cpu.${n}.coretemp >/dev/null 2>&1
> done
> done
>
> for a few hours and didn't see any problems.
>
> What panic are you getting? How exactly are polling the temperature
> sensors - which sysctls are you reading?
>
> Thanks,
> -Mark
>
----- End forwarded message -----
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