[vserver] memory reporting in guest

hi,

   Just wanted to have a look at memory report in the guest, on a recent test with no limits on the guest so it owns all the host ram as it is alone on it:

I runned: free -k ; vserver myguest exec free -k; tail m*usage*; cat /proc/meminfo

               total used free shared buff/cache available
Mem: 32899752 8337540 974416 75216 23587796 24016424
Swap: 3903484 386420 3517064

               total used free shared buff/cache available
Mem: 32899752 16993004 15439052 75216 467696 704392
Swap: 0 0 0

   swap 0 is normal we do not allow guest to swap. But the used/free/buff-cache/available difference is quite large. The cgroup usage of the guest is:

==> memory.kmem.max_usage_in_bytes <==
648863744

==> memory.kmem.tcp.max_usage_in_bytes <==
0

==> memory.kmem.tcp.usage_in_bytes <==
0

==> memory.kmem.usage_in_bytes <==
419672064

==> memory.max_usage_in_bytes <==
33245798400

==> memory.memsw.max_usage_in_bytes <==
33689448448

==> memory.memsw.usage_in_bytes <==
18203516928

==> memory.usage_in_bytes <==
17879355392

MemTotal: 32899752 kB
MemFree: 974336 kB
MemAvailable: 24016348 kB
Buffers: 308972 kB
Cached: 22811128 kB
SwapCached: 84452 kB
Active: 21965572 kB
Inactive: 9233376 kB
Active(anon): 6312276 kB
Inactive(anon): 1841792 kB
Active(file): 15653296 kB
Inactive(file): 7391584 kB
Unevictable: 12 kB
Mlocked: 12 kB
SwapTotal: 3903484 kB
SwapFree: 3517064 kB
Dirty: 124 kB
Writeback: 0 kB
AnonPages: 8013512 kB
Mapped: 133524 kB
Shmem: 75216 kB
Slab: 550988 kB
SReclaimable: 467696 kB
SUnreclaim: 83292 kB
KernelStack: 8112 kB
PageTables: 34688 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
WritebackTmp: 0 kB
CommitLimit: 20353360 kB
Committed_AS: 11809700 kB
VmallocTotal: 34359738367 kB
VmallocUsed: 0 kB
VmallocChunk: 0 kB
HardwareCorrupted: 0 kB
AnonHugePages: 0 kB
ShmemHugePages: 0 kB
ShmemPmdMapped: 0 kB
CmaTotal: 0 kB
CmaFree: 0 kB
HugePages_Total: 0
HugePages_Free: 0
HugePages_Rsvd: 0
HugePages_Surp: 0
Hugepagesize: 2048 kB
DirectMap4k: 2890700 kB
DirectMap2M: 30547968 kB
DirectMap1G: 2097152 kB

is there any way to be better at this ?

-- 
cordialement,
Ghislain