Hi everybody!

I have OEL 5.6 (2.6.32) x86_64 server with 10Gb RAM.
Right after boot I see such picture:

Code:
free -m
             total       used       free     shared    buffers     cached
Mem:          9959       4516       5442          0          2         50
-/+ buffers/cache:       4464       5495
Swap:         6143          0       6143
Sum of VSZ of all processes gives 2,6Gb.
Dropping cache gives nothing. (echo 1 > /proc/sys/vm/drop_caches)

Help me to find out what uses rest 2Gb of memory.

Add.info:

Code:
#cat /proc/meminfo
MemTotal:       10198236 kB
MemFree:         5573032 kB
Buffers:            1832 kB
Cached:            51896 kB
SwapCached:            0 kB
Active:            40920 kB
Inactive:          39520 kB
Active(anon):      32576 kB
Inactive(anon):        8 kB
Active(file):       8344 kB
Inactive(file):    39512 kB
Unevictable:        9592 kB
Mlocked:            9616 kB
SwapTotal:       6291448 kB
SwapFree:        6291448 kB
Dirty:                 0 kB
Writeback:             0 kB
AnonPages:         36276 kB
Mapped:            20592 kB
Shmem:               348 kB
Slab:             277016 kB
SReclaimable:      73624 kB
SUnreclaim:       203392 kB
KernelStack:        1600 kB
PageTables:         4480 kB
NFS_Unstable:          0 kB
Bounce:                0 kB
WritebackTmp:          0 kB
CommitLimit:     9293412 kB
Committed_AS:     187872 kB
VmallocTotal:   34359738367 kB
VmallocUsed:       42364 kB
VmallocChunk:   34359584112 kB
HugePages_Total:    2048
HugePages_Free:     2048
HugePages_Rsvd:        0
HugePages_Surp:        0
Hugepagesize:       2048 kB
DirectMap4k:       10184 kB
DirectMap2M:    10409984 kB