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inconsistent physpages when validating config file [message #44196]

Wed, 23 November 2011 19:21

narcisgarcia
Messages: 41
Registered: May 2009

Member

I'm using Debian 6 (stable, Linux 2.6.32) with vzctl version 3.0.24
Look at error message and same memory results in the container.

$ getconf PAGE_SIZE
4096

$ vzctl create 777 --ostemplate debian-6.0-x86
Creating container private area (debian-6.0-x86)
Performing postcreate actions
Container private area was created

$ vzctl set 777 --physpages 0:256m --swappages 0:512m --setmode restart --save
Saved parameters for CT 777

$ vzlist --all --output ctid,physpages.b,physpages.l,swappages.b,swappages.l
      CTID    PHYSP.B    PHYSP.L    SWAPP.B    SWAPP.L
       777          0      65536          0     131072

$ vzctl start 777
Starting container ...
Container is mounted
Setting CPU units: 1000
Container start in progress...

$ vzctl exec 777 "free -m"
             total       used       free     shared    buffers     cached
Mem:           256         10        245          0          0          0
-/+ buffers/cache:         10        245
Swap:          512          0        512

$ vzcfgvalidate -r /etc/vz/conf/777.conf
Error: limit should be = 2147483647 for physpages (currently, 65536)
set to 2147483647
Validation completed: success

$ vzctl stop 777
Stopping container ...
Container was stopped
Container is unmounted

$ vzctl start 777
Starting container ...
Container is mounted
Setting CPU units: 1000
Container start in progress...

$ vzlist --all --output ctid,physpages.b,physpages.l,swappages.b,swappages.l
      CTID    PHYSP.B    PHYSP.L    SWAPP.B    SWAPP.L
       777          0 2147483647          0          0

$ vzctl exec 777 "free -m"
             total       used       free     shared    buffers     cached
Mem:           256         10        245          0          0          0
-/+ buffers/cache:         10        245
Swap:          512          0        512

$ vzcfgvalidate -r /etc/vz/conf/777.conf
Validation completed: success

I don't understand why physpages.l should be 2147483647 instead of 65536, and why once the value is "corrected", RAM and Swap for the container still have the initial values set.

Narcis Garcia

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Re: inconsistent physpages when validating config file [message #44745 is a reply to message #44196]

Tue, 27 December 2011 09:19

narcisgarcia
Messages: 41
Registered: May 2009

Member

What's wrong in the memory setting command?
Why vzcfgvalidate finds invalid values and why resultant strange values are right?

Narcis Garcia

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Re: inconsistent physpages when validating config file [message #44746 is a reply to message #44196]

Tue, 27 December 2011 10:55

Artem
Messages: 9
Registered: December 2011
Location: Belarus, Minsk

Junior Member

can you provide your OpenVZ kernel version (uname -sr) ?

What are 'vmguarpages' and 'privvmpages' values set in your config? (I suppose they are set to near 256m). It is possible that you are using non-VSwap kernel, then you need to set physpages to 0:MAXLONG and use other *pages to configure memory.

wiki.openvz.org/VSwap

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Re: inconsistent physpages when validating config file [message #44748 is a reply to message #44746]

Tue, 27 December 2011 12:48

narcisgarcia
Messages: 41
Registered: May 2009

Member

$ lsb_release -sd
Debian GNU/Linux 6.0.3 (squeeze)

$ uname -sr
Linux 2.6.32-5-openvz-686

$ vzctl --version
vzctl version 3.0.24

Narcis Garcia

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