[Tmem-devel] tmem how to get current usage in megabytes?

[Dan Magenheimer]

Hmmm.... it appears to me that your 2GB swapdisk is
already full.  I think the self-ballooning IS working
but is targeting a memory size which is too small
which results in swapping.  Then frontswap gets
filled up (limited to sum of sizes of your swapdisks).
Do I remember from an earlier email that you have
"noselfshrink" in your guest grub.conf?  If so, then
frontswap will remain full.

I would first try increasing the size of your guest
swap disk (or, if easier, adding a second much larger
swap disk) to see if it helps.

There are also a number of "tunables" for selfballooning
and frontswap-selfshrinking that can be adjusted in
/sys/devices/system/xen_memory/xen_memory0/*
including a min_target_kb that will limit the lower
limit that selfballooning will target.

I have a script which runs inside the guest to measure
certain important memory activity.  I usually launch it
in /etc/rc.local, though by the time /etc/rc.local
starts, self-ballooning has already started.  See
attached script.

Hope that helps!
Dan


> -----Original Message-----
> From: Vasiliy G Tolstov [mailto:v.tolstov at selfip.ru]
> Sent: Wednesday, August 18, 2010 10:42 AM
> To: Dan Magenheimer
> Cc: tmem-devel at oss.oracle.com
> Subject: RE: [Tmem-devel] tmem how to get current usage in megabytes?
> 
> В Срд, 18/08/2010 в 09:34 -0700, Dan Magenheimer пишет:
> 
> Ok. I'm try to adopt patch 2.6.32 to 2.6.34 opensuse kernel (in attach)
> 
> I see that i have mistake somewhere and memory not ballon up and not
> shrinking. Can You helps me?
> 
> linux:~ # dmesg | grep Tran
> [    0.569749] frontswap enabled, RAM provided by Xen Transcendent
> Memory
> [    0.569752] cleancache enabled, RAM provided by Xen Transcendent
> Memory
> 
> linux:~ # cat /sys/kernel/mm/frontswap/*
> 6306
> 0
> 472631
> 531
> 478937
> 
> linux:~ # cat /sys/kernel/mm/cleancache/*
> 8829
> 67
> 5039
> 1369
> 
> 
> kernel loaded with tmem command line
> 
> --
> Vasiliy G Tolstov <v.tolstov at selfip.ru>
> Selfip.Ru
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