Bug#665206: vserver incorrect handling of rlimits

[Холманских Станислав Сергеевич <kholmanskikh@ertelecom.ru>]

Package: linux-image-2.6.32-5-vserver-amd64
Version: 2.6.32-41

In a vserver based virtual machine /proc/meminfo shows incorrect values 
of Buffers memory:
root@node2:~# uname -a
Linux node2 2.6.32-5-vserver-amd64 #1 SMP Mon Jan 16 19:31:31 UTC 2012 
x86_64 GNU/Linux
root@node2:~# vserver vm enter
root@vm:/# cat /proc/meminfo |grep Buffers
Buffers:           80040 kB
root@vm:/#

And as a result 'free' command invoked in this virtual machine gives 
very strange values:
vm # free
root@vm:/# free -k
                  total          used       free         shared    
buffers     cached
Mem:       4000000       7868    3992132          0         79896          0
-/+ buffers/cache: 18014398509409956    4072028
Swap:            0          0          0
root@vm:/#
In this output the amount of used memory - buffers/cache is bigger than 
I'm able to install in a physicall host:)

Here is a patch to resolve this problem - 
http://comments.gmane.org/gmane.linux.vserver/17878

I applied  this patch to 2.6.32-5-vserver kernel sources, compiled the 
kernel, and now Buffers value of /proc/meminfo
is 0:
root@vm:/# free -k
            total       used       free     shared    buffers     cached
Mem:       4000000       5724    3994276          0          0          0
-/+ buffers/cache:       5724    3994276
Swap:            0          0          0
root@vm:/# cat /proc/meminfo |grep Buffers
Buffers:               0 kB
root@vm:/#



----
Stanislav Kholmanskikh
kholmanskikh@ertelecom.ru