Re: [Bug 50181] New: Memory usage doubles after more then 20 hours of uptime.

[Milos Jakovljevic <sukijaki@gmail.com>]

On Tue, 2012-11-13 at 14:03 -0800, Andrew Morton wrote: 
> (switched to email.  Please respond via emailed reply-to-all, not via the
> bugzilla web interface).
> 
> On Tue,  6 Nov 2012 15:11:48 +0000 (UTC)
> bugzilla-daemon@bugzilla.kernel.org wrote:
> 
> > https://bugzilla.kernel.org/show_bug.cgi?id=50181
> > 
> >            Summary: Memory usage doubles after more then 20 hours of
> >                     uptime.
> >            Product: Memory Management
> >            Version: 2.5
> >     Kernel Version: 3.7-rc3 and 3.7-rc4
> >           Platform: All
> >         OS/Version: Linux
> >               Tree: Mainline
> >             Status: NEW
> >           Severity: normal
> >           Priority: P1
> >          Component: Other
> >         AssignedTo: akpm@linux-foundation.org
> >         ReportedBy: sukijaki@gmail.com
> >         Regression: Yes
> > 
> > 
> > Created an attachment (id=85721)
> >  --> (https://bugzilla.kernel.org/attachment.cgi?id=85721)
> > kernel config file
> > 
> > After 20 hours of uptime, memory usage starts going up. Normal usage for my
> > system was around 2.5GB max with all my apps and services up and running. But
> > with 3.7-rc3 and now -rc4 kernel, after more then 20 hours of uptime, it starts
> > to going up. With kernel before 3.7-rc3, my machine could be up for 10 days and
> > not go beyond 2.6GB memory usage.
> > 
> > If I start some app that uses a lot of memory, when there is already 4 or even
> > 6GB used already, insted of freeing the memory, it starts to swap it, and
> > everything slows down with a lot of iowait. 
> > 
> > Here is "free -m" output after 24 hours of uptime:
> > 
> > free -m
> >              total       used       free     shared    buffers     cached
> > Mem:          7989       7563        426          0        146       2772
> > -/+ buffers/cache:       4643       3345
> > Swap:         1953        688       1264
> > 
> > 
> > I know that it is ok for memory to be used this much for buffers and cache, but
> > it is not normal not to relase it when it is needed.
> > 
> > In attachment is my kernel config file.
> > 
> 
> Sounds like a memory leak.
> 
> Please get the machine into this state and then send us
> 
> - the contents of /proc/meminfo
> 
> - the contents of /proc/slabinfo
> 
> - the contents of /proc/vmstat
> 
> - as root:
> 
> 	dmesg -c
> 	echo m > /proc/sysrq-trigger
> 	dmesg
> 
> thanks.

Will do. But it will take a day or two to get there, I rebooted today
because of this problem.


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