Milter-greylist

The consumption of virtual memory milter-greylist uses grows constantly 
(currently just under 2GB), however resident memory use is constant. 
This does not seem to be affecting performance. Any thoughts?

Here is a dump of /proc/status/13531

Name:   milter-greylist
State:  S (sleeping)
SleepAVG:       88%
Tgid:   13531
Pid:    13531
PPid:   1
TracerPid:      0
Uid:    15      15      15      15
Gid:    16000   16000   16000   16000
FDSize: 256
Groups: 11 16000
VmSize:  1967444 kB
VmLck:         0 kB
VmRSS:    133336 kB
VmData:  1964960 kB
VmStk:       772 kB
VmExe:        97 kB
VmLib:      1539 kB
StaBrk: 08086000 kB
Brk:    104d0000 kB
StaStk: bff72d30 kB
ExecLim:        08061000
Threads:        13
SigPnd: 0000000000000000
ShdPnd: 0000000000000000
SigBlk: 0000000000004003
SigIgn: 0000000000001000
SigCgt: 0000000180000000
CapInh: 0000000000000000
CapPrm: 0000000000000000
CapEff: 0000000000000000


Thanks again,
Fredrik Nyberg