Kiprobaltam (ez mar a desktop gepem):
[root@muszi ~]# free
total used free shared buffers cached
Mem: 1554404 1325228 229176 0 444568 164980
-/+ buffers/cache: 715680 838724
Swap: 570300 1316 568984
[root@muszi ~]# umount /sys
[root@muszi ~]# free
total used free shared buffers cached
Mem: 1554404 1325296 229108 0 444580 165148
-/+ buffers/cache: 715568 838836
Swap: 570300 1316 568984
[root@muszi ~]# mount -t sysfs sysfs /sys
[root@muszi ~]# free
total used free shared buffers cached
Mem: 1554404 1325356 229048 0 444596 165232
-/+ buffers/cache: 715528 838876
Swap: 570300 1316 568984
Ugy nezem, lenyegesen nem valtozott a memoriahasznalat (ez is 2.6.34.13-as kernel).