Hi, Looks like linux_2_4_devel is very unstable under high TCP/IP loads and low amounts of memory on the Walnut.
Here's how to get a *double* kernel panic: 1) download http_load from http://www.acme.com/software/http_load/ 2) cross compile for ppc405 using MontaVista JE 2.0 (very easy to do, just change CC in the Makefile) 3) setup fast webserver on same network as Walnut, with one large page availible (I used the linux kernel tarball and khttpd on a x86 box). 4) boot Walnut with "mem=8M" or "mem=4M" -- it's probably possible to make this panic happen with larger amounts of physical memory, but it is much faster and easier if you restrict mem via cmdline. 5) run "http_load -parallel 200 -fetches 1000 urls" where "urls" is a file in cwd containing something like "http://192.168.1.1:8080/linux.tar.gz"; 6) sit back and wait a few seconds. you should see something like this: http://192.168.3.126:8080/foo.htm: check-connect SUCCEEDED, ignoring http://192.168.3.126:8080/foo.htm: check-connect SUCCEEDED, ignoring ... http://192.168.3.126:8080/foo.htm: check-connect SUCCEEDED, ignoring http:/Oops: kernel access of bad area, sig: 11 NIP: C009CB00 XER: 00000000 LR: C009CAD8 SP: C0E25DC0 REGS: c0e25d00 TRAP: 0800 Not tainted MSR: 00009030 EE: 1 PR: 0 FP: 0 ME: 1 IR/DR: 11 TASK = c0e24000[47] 'http_load' Last syscall: 4 last math 00000000 last altivec 00000000 PLB0: bear= 0x00aff17c acr= 0x00000000 besr= 0x00000000 PLB0 to OPB: bear= 0x00000000 besr0= 0x00000000 besr1= 0x00000000 GPR00: C009CAD8 C0E25DC0 C0E24000 00000000 00001030 C012A514 C0222F38 45442C20 GPR08: C01D6140 00000001 00000010 C0187380 00000018 1001FB04 00000000 00000000 GPR16: 00000000 00000000 10010000 FFFFFFFF 00001032 00E25E40 00000000 C0002860 GPR24: C0003964 00000180 C01E6200 C0FFC028 000005EE C0FF1010 C0FFC000 00000000 Call backtrace: C009CAD8 C00038C0 C00039F4 C0002860 C003365C C000263C 946ECA52 0FF3C1EC 0FF3CE20 0FF2E280 0FF29558 0FF31C58 10002468 100017F8 0FF06298 00000000 ppc405_eth_serr: Receive channel 0 ----- latched error ----- DE: descriptor error ----- cumulative errors ----- DEI: descriptor error interrupt PPC405 Ethernet driver received a receive descriptor error EMAC DEBUG ********** EMAC_M0 ==> 0x18000000 EMAC_M1 ==> 0x8788000 EMAC_TXM0==> 0x0 EMAC_TXM1==> 0x380f0000 EMAC_RXM ==> 0x580000 EMAC_ISR ==> 0x42 EMAC_IER ==> 0x1af0000 EMAC_IAH ==> 0x4 EMAC_IAL ==> 0xace310b1 EMAC_VLAN_TPID_REG ==> 0x8808 MAL DEBUG ********** MCR ==> 0x7c082 ESR ==> 0x40100000 IER ==> 0x1f DBR ==> 0x0 TXCASR ==> 0x80000000 TXCARR ==> 0x80000000 TXEOBISR ==> 0x0 TXDEIR ==> 0x0 RXCASR ==> 0x0 RXCARR ==> 0x0 RXEOBISR ==> 0x80000000 RXDEIR ==> 0x80000000 TXCTP0R ==> 0xff6000 TXCTP1R ==> 0xf80000 RXCTP0R ==> 0xff1000 RCBS0 ==> 0x80 dumping the receive descriptors: current slot is 2 Desc 00: status 0x1c00, length 70, addr 0x224010 Desc 01: status 0x1c00, length 70, addr 0x223010 Desc 02: status 0x1c00, length 1518, addr 0x780010 Desc 03: status 0x1c00, length 1518, addr 0x25f010 Desc 04: status 0x1c00, length 1518, addr 0x25e010 Desc 05: status 0x1c00, length 1518, addr 0x25d010 Desc 06: status 0x1c00, length 1518, addr 0x25c010 Desc 07: status 0x1c00, length 70, addr 0x25b010 Desc 08: status 0x1c00, length 70, addr 0x259010 Desc 09: status 0x1c00, length 70, addr 0x258010 Desc 10: status 0x1c00, length 70, addr 0x257010 Desc 11: status 0x1c00, length 70, addr 0x256010 Desc 12: status 0x1c00, length 70, addr 0x255010 Desc 13: status 0x1c00, length 70, addr 0x254010 Desc 14: status 0x1c00, length 70, addr 0x253010 Desc 15: status 0x1c00, length 70, addr 0x252010 Desc 16: status 0x1c00, length 70, addr 0x251010 Desc 17: status 0x1c00, length 70, addr 0x250010 Desc 18: status 0x1c00, length 70, addr 0x24f010 Desc 19: status 0x1c00, length 70, addr 0x74e010 Desc 20: status 0x1c00, length 70, addr 0x2a3010 Desc 21: status 0x1c00, length 70, addr 0x24e010 Desc 22: status 0x1c00, length 70, addr 0x24d010 Desc 23: status 0x1c00, length 70, addr 0x24c010 Desc 24: status 0x1c00, length 70, addr 0x24b010 Desc 25: status 0x1c00, length 70, addr 0x24a010 Desc 26: status 0x1c00, length 70, addr 0x249010 Desc 27: status 0x1c00, length 70, addr 0x248010 Desc 28: status 0x1c00, length 70, addr 0x247010 Desc 29: status 0x1c00, length 70, addr 0x246010 Desc 30: status 0x1c00, length 70, addr 0x245010 Desc 31: status 0x1c00, length 70, addr 0x244010 Desc 32: status 0x1c00, length 70, addr 0x243010 Desc 33: status 0x1c00, length 70, addr 0x242010 Desc 34: status 0x1c00, length 70, addr 0x241010 Desc 35: status 0x1c00, length 70, addr 0x240010 Desc 36: status 0x1c00, length 70, addr 0x602010 Desc 37: status 0x1c00, length 70, addr 0x23f010 Desc 38: status 0x1c00, length 70, addr 0x23e010 Desc 39: status 0x1c00, length 70, addr 0x23c010 Desc 40: status 0x1c00, length 70, addr 0x23b010 Desc 41: status 0x1c00, length 70, addr 0x23a010 Desc 42: status 0x1c00, length 70, addr 0x239010 Desc 43: status 0x1c00, length 70, addr 0x238010 Desc 44: status 0x1c00, length 247, addr 0x237010 Desc 45: status 0x1c00, length 70, addr 0x236010 Desc 46: status 0x1c00, length 70, addr 0x358010 Desc 47: status 0x1c00, length 70, addr 0x235010 Desc 48: status 0x1c00, length 70, addr 0x234010 Desc 49: status 0x1c00, length 70, addr 0x233010 Desc 50: status 0x1c00, length 70, addr 0x232010 Desc 51: status 0x1c00, length 70, addr 0x231010 Desc 52: status 0x1c00, length 70, addr 0x230010 Desc 53: status 0x1c00, length 70, addr 0x22f010 Desc 54: status 0x1c00, length 70, addr 0x22e010 Desc 55: status 0x1c00, length 70, addr 0x22d010 Desc 56: status 0x1c00, length 70, addr 0x22c010 Desc 57: status 0x1c00, length 70, addr 0x22b010 Desc 58: status 0x1c00, length 70, addr 0x22a010 Desc 59: status 0x1c00, length 70, addr 0x229010 Desc 60: status 0x1c00, length 70, addr 0x228010 Desc 61: status 0x1c00, length 70, addr 0x227010 Desc 62: status 0x1c00, length 70, addr 0x226010 Desc 63: status 0x5c00, length 70, addr 0x225010 Oops: kernel access of bad area, sig: 11 NIP: C009CD8C XER: 20000000 LR: C009CD38 SP: C0E25AB0 REGS: c0e259f0 TRAP: 0800 Not tainted MSR: 00009030 EE: 1 PR: 0 FP: 0 ME: 1 IR/DR: 11 TASK = c0e24000[47] 'http_load' Last syscall: 4 last math 00000000 last altivec 00000000 PLB0: bear= 0x00aff17c acr= 0x00000000 besr= 0x00000000 PLB0 to OPB: bear= 0x00000000 besr0= 0x00000000 besr1= 0x00000000 GPR00: 00001C00 C0E25AB0 C0E24000 00000035 00001030 00000001 00000020 C0160000 GPR08: 00001E7A 00000000 000005EE 00000010 00000018 1001FB04 00000000 00000000 GPR16: 00000000 00000000 10010000 FFFFFFFF 00001032 00E25B30 00000000 C0002860 GPR24: C0003964 00000002 C01E6200 00000010 C0FFC000 C0FFC020 00000002 00000008 Call backtrace: C009CD38 C00038C0 C00039F4 C0002860 C00029F0 C000B020 C000AE98 C0002868 C009CAD8 C00038C0 C00039F4 C0002860 C003365C C000263C 946ECA52 0FF3C1EC 0FF3CE20 0FF2E280 0FF29558 0FF31C58 10002468 100017F8 0FF06298 00000000 Kernel panic: Aiee, killing interrupt handler! In interrupt handler - not syncing <0>Rebooting in 180 seconds.. --- This panic looks like a PPC 405GP ethernet driver issue, perhaps with some VM interaction thrown in. I have access to a BDI2000 and may be able to help debug. Feel free to e-mail me privately if you'd like my kernel configuration or any additional info... should be fairly easy to reproduce with the above recipe, though. Regards, -Bryan -- Bryan Rittmeyer mailto:bryan at ixiacom.com ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
