Kernel error

kernel: Page has mapping still set. This is a serious situation. However if you
kernel: are using the NVidia binary only module please report this bug to
kernel: NVidia and not to the linux kernel mailinglist.
kernel: ------------[ cut here ]------------
kernel: kernel BUG at page_alloc.c:122!
kernel: invalid operand: 0000
kernel: w83781d eeprom i2c-proc i2c-isa i2c-i801 i2c-core ipt_mark ipt_MARK ipt_TOS iptable_mangle ip_conntrack_ftp ip_conntrack_irc ipt_unclean ipt_REJECT ipt_LOG ip
kernel: CPU: 0
kernel: EIP: 0060:[<c013618b>] Not tainted
kernel: EFLAGS: 00010282
kernel:
kernel: EIP is at __free_pages_ok [kernel] 0x307 (2.4.20-28.9)
kernel: eax: 00000033 ebx: 00001000 ecx: 00000001 edx: f56bc000
kernel: esi: c1a9e768 edi: 00000000 ebp: d13758c8 esp: e3075ed8
kernel: ds: 0068 es: 0068 ss: 0068
kernel: Process mysqld (pid: 16301, stackpage=e3075000)
kernel: Stack: c023ea20 c023e9c0 c023e960 00000d01 00000d41 c108ee6c 0000001f 00000000
kernel: 00000d50 c1a9e768 00051000 00001000 c1a9e768 d13758c8 00000d51 c012ce28
kernel: e3075f7c c1a9e768 00000000 00001000 00001000 00000001 00000000 00000000
kernel: Call Trace: [<c012ce28>] do_generic_file_read [kernel] 0x228 (0xe3075f14))
kernel: [<c012d2f8>] file_read_actor [kernel] 0x0 (0xe3075f40))
kernel: [<c012d424>] generic_file_read [kernel] 0xa8 (0xe3075f60))
kernel: [<c012d2f8>] file_read_actor [kernel] 0x0 (0xe3075f70))
kernel: [<c013cbf4>] sys_read [kernel] 0x84 (0xe3075f9c))
kernel: [<c0108d7b>] system_call [kernel] 0x33 (0xe3075fc0))