Is it kernel bug? The code works normally on ia64 machine,howerver, on EM64T,it fails tot work.
The function call of shmat will change /proc/meminfo file's content;and  the shmdt
can't restore the file's content.  How to restore it to original stauts?Thanks.
-------------------------------------------------------
=== before shmat ===
MemTotal:      2056388 kB
MemFree:        607300 kB
Buffers:         43976 kB
Cached:         134252 kB
SwapCached:          0 kB
Active:         151940 kB
Inactive:        63436 kB
HighTotal:           0 kB
HighFree:            0 kB
LowTotal:      2056388 kB
LowFree:        607300 kB
SwapTotal:     4096564 kB
SwapFree:      4096564 kB
Dirty:             176 kB
Writeback:           0 kB
Mapped:          50880 kB
Slab:            93236 kB
Committed_AS:    90340 kB
PageTables:       3528 kB
VmallocTotal: 536870911 kB
VmallocUsed:    264436 kB
VmallocChunk: 536606243 kB
HugePages_Total:   500
HugePages_Free:    500
Hugepagesize:     2048 kB

=== after shmat ===
MemTotal:      2056388 kB
MemFree:        607300 kB
Buffers:         43976 kB
Cached:         134252 kB
SwapCached:          0 kB
Active:         151940 kB
Inactive:        63436 kB
HighTotal:           0 kB
HighFree:            0 kB
LowTotal:      2056388 kB
LowFree:        607300 kB
SwapTotal:     4096564 kB
SwapFree:      4096564 kB
Dirty:             176 kB
Writeback:           0 kB
Mapped:          50880 kB
Slab:            93236 kB
Committed_AS:    90340 kB
PageTables:       3528 kB
VmallocTotal: 536870911 kB
VmallocUsed:    264436 kB
VmallocChunk: 536606243 kB
HugePages_Total:   500
HugePages_Free:    0
Hugepagesize:     2048 kB

=== after shmdt===
MemTotal:      2056388 kB
MemFree:        607300 kB
Buffers:         43976 kB
Cached:         134252 kB
SwapCached:          0 kB
Active:         151940 kB
Inactive:        63436 kB
HighTotal:           0 kB
HighFree:            0 kB
LowTotal:      2056388 kB
LowFree:        607300 kB
SwapTotal:     4096564 kB
SwapFree:      4096564 kB
Dirty:             176 kB
Writeback:           0 kB
Mapped:          50880 kB
Slab:            93236 kB
Committed_AS:    90340 kB
PageTables:       3528 kB
VmallocTotal: 536870911 kB
VmallocUsed:    264436 kB
VmallocChunk: 536606243 kB
HugePages_Total:   500
HugePages_Free:    0
Hugepagesize:     2048 kB