hi,all:
I have a bad headache of the memory problem of mpc8260 board using
linuxppc-2.4.4, the ELDK version.we got 32M ram,after booting,it seems
have 21000 K free,but when we use the system,it seems have little
memory.I did a simple test about this,and use bdi2000+gdb get some
data.and feel lost about the infomation.Can anybody give some infomation
about it? thx a lot.
==>the simple program is used to test:
sleep1.c:
main()
{
while(1)
sleep(1);
}
==>call it 12 times:
bash-2.05#./sleep1 &
[12] 229
==>just now ,it jump into the break point:
Breakpoint 4, bad_page_fault (regs=0xc1cd3ab0, address=2104558664,
sig=2104558456) at fault.c:224
224 if ((fixup = search_exception_table(regs->nip)) != 0) {
(gdb) bt
#0 bad_page_fault (regs=0xc1cd3ab0, address=2104558664, sig=2104558456) at
fault.c:224
#1 0xc000c964 in do_page_fault (regs=0xc1cd3ab0, address=2104558664,
error_code=536870912) at fault.c:185
#2 0xc0003de4 in ret_from_except () at init/main.c:858
#3 0xc00fbec4 in udp_data_ready (sk=0xc0254680, len=2104558664) at xprt.c:654
#4 0xc00e9624 in udp_queue_rcv_skb (sk=0xc0254680, skb=0xc025d620)
at /home/xdhe/begin/linux-2.4/include/net/sock.h:1191
#5 0xc00e9aa8 in udp_rcv (skb=0xc025d620) at udp.c:908
#6 0xc00ca1c0 in ip_local_deliver (skb=0xc025d620) at ip_input.c:265
#7 0xc00ca618 in ip_rcv (skb=0xc025d620, dev=0x7d710448, pt=0xb) at
ip_input.c:372
#8 0xc00c037c in net_rx_action (h=0xc1cd3ab0) at dev.c:1485
#9 0xc0016880 in do_softirq () at softirq.c:78
#10 0xc0003e0c in do_bottom_half_ret () at init/main.c:858
#11 0xc002180c in do_wp_page (mm=0xc0004de8, vma=0xc19a5f20, address=269104860,
page_table=0xc1b7a28c, pte=
{pte = 25297283}) at memory.c:953
#12 0xc002226c in handle_mm_fault (mm=0xc02e8220, vma=0xc19a5f20,
address=269104860, write_access=33554432)
at memory.c:1312
#13 0xc000c860 in do_page_fault (regs=0xc1cd3e90, address=269104860,
error_code=167772160) at fault.c:149
#14 0xc0003de4 in ret_from_except () at init/main.c:858
#15 0x10019804 in ?? ()
best regards.
shuaiye
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