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SubjectRe: 2.0.32 kernel oops
Date
[Cc-ed to Don Becker - there is a smell of ethernet drivers here!]

kutvonen@cs.Helsinki.FI said:
} However, there is certainly something in 2.0.32 which causes first
} "Unable to handle kernel paging request" and to total lockup later.
} This seems to happen under heavy network load and only with machines
} with more than one network interface. Maybe this is related to what
} Doug Paul (dbp@dragonsys.com) reported a few days ago about ipfw.
We have a *large* number of machines deployed.
They are configured with masquerading (and associated firewall, forward,
defrag options).
We have seen this problem since 2.0.30 [meaning that we have seen it with
2.0.30+, but we don't have data for 2.0.29 and earlier].

Our machines have either 3c509 ethernet cards, or tulip based cards.
We have seen this bug *only* with the 3c509 systems, we have not seen it
on any tulip based systems.

So common features are:-
2 ethernets
limited set of ethernet cards (3c509, EtherExpress Pro 10/100)

The report by Doug Paul had the following config options in common with
us:-
CONFIG_EXPERIMENTAL=y
CONFIG_NET=y
CONFIG_PCI=y
CONFIG_PCI_OPTIMIZE=y
CONFIG_SYSVIPC=y
CONFIG_BINFMT_ELF=y
CONFIG_KERNEL_ELF=y
CONFIG_BLK_DEV_FD=y
CONFIG_FIREWALL=y
CONFIG_INET=y
CONFIG_SYN_COOKIES=y
CONFIG_IP_FIREWALL=y
CONFIG_IP_FIREWALL_VERBOSE=y
CONFIG_IP_ALWAYS_DEFRAG=y
CONFIG_IP_ACCT=y
CONFIG_IP_NOSR=y
CONFIG_SKB_LARGE=y
CONFIG_NETDEVICES=y
CONFIG_NET_ETHERNET=y
CONFIG_NET_VENDOR_3COM=y
CONFIG_EL3=y
CONFIG_EXT2_FS=y
CONFIG_PROC_FS=y
CONFIG_ISO9660_FS=y
CONFIG_SERIAL=y
CONFIG_WATCHDOG=y
CONFIG_SOFT_WATCHDOG=y

All affected boxes appear to have Intel Triton (older version, not II).
Problem is independent of whether Triton kernel support is switched on.

Example Oops set tagged on after this...

Nigel.

Nov 27 07:46:00 gate-isdn kernel: Unable to handle kernel paging request
at virtual address d0642264
Nov 27 07:46:00 gate-isdn kernel: current->tss.cr3 = 00532000, (r3 =
00532000
Nov 27 07:46:00 gate-isdn kernel: *pde = 00000000
Nov 27 07:46:00 gate-isdn kernel: Oops: 0000
Nov 27 07:46:00 gate-isdn kernel: CPU: 0
Nov 27 07:46:00 gate-isdn kernel: EIP: 0010:[ext2_readdir+1362/1496]
Nov 27 07:46:00 gate-isdn kernel: EFLAGS: 00010246
Nov 27 07:46:00 gate-isdn kernel: eax: 00000000 ebx: 00000400 ecx:
00087498 edx: 00000400
Nov 27 07:46:00 gate-isdn kernel: esi: 00000400 edi: 080961a8 ebp:
00000000 esp: 00515ef0
Nov 27 07:46:00 gate-isdn kernel: ds: 0018 es: 0018 fs: 002b gs:
002b ss: 0018
Nov 27 07:46:00 gate-isdn kernel: Process bash (pid: 27317, process nr:
35, stackpage=00515000)
Nov 27 07:46:00 gate-isdn kernel: Stack: 00588088 00001000 080961a8
bffffcc0 00085160 00515f60 00000002 00000000
Nov 27 07:46:00 gate-isdn kernel: 00000000 00000000 00000000
00000002 00000400 00000000 00000000 00000000
Nov 27 07:46:00 gate-isdn kernel: 00000000 001bdf10 00087498
00000018 00000000 ffffffe5 0011a996 0011aa12
Nov 27 07:46:00 gate-isdn kernel: Call Trace: [do_no_page+258/776]
[do_no_page+382/776] [do_no_page+0/776] [sys_getdents+150/200]
[filldir+0/164] [system_call+85/124]
Nov 27 07:46:00 gate-isdn kernel: Code: 83 7c 7c 24 00 75 3c 8b 8c 24 9c
00 00 00 8b 51 14 89 d3 89
Nov 27 07:46:08 gate-isdn kernel: Unable to handle kernel paging request
at virtual address d0b49ff4
Nov 27 07:46:08 gate-isdn kernel: current->tss.cr3 = 00453000, (r3 =
00453000
Nov 27 07:46:08 gate-isdn kernel: *pde = 00000000
Nov 27 07:46:08 gate-isdn kernel: Oops: 0000
Nov 27 07:46:08 gate-isdn kernel: CPU: 0
Nov 27 07:46:08 gate-isdn kernel: EIP: 0010:[ext2_readdir+1362/1496]
Nov 27 07:46:08 gate-isdn kernel: EFLAGS: 00010246
Nov 27 07:46:08 gate-isdn kernel: eax: 00000000 ebx: 00000400 ecx:
00b88b18 edx: 00000400
Nov 27 07:46:08 gate-isdn kernel: esi: 00000400 edi: 0814f070 ebp:
00000000 esp: 008abef0
Nov 27 07:46:08 gate-isdn kernel: ds: 0018 es: 0018 fs: 002b gs:
002b ss: 0018
Nov 27 07:46:08 gate-isdn kernel: Process squid (pid: 27305, process nr:
4, stackpage=008ab000)
Nov 27 07:46:08 gate-isdn kernel: Stack: 00588044 00001000 0814f070
bffffddc 00b68c18 008abf60 00000002 00000000
Nov 27 07:46:08 gate-isdn kernel: 00000000 00000000 00000000
00524a71 00000400 00000000 00000000 00000000
Nov 27 07:46:08 gate-isdn kernel: 00000000 001be238 00b88b18
00000003 00000000 ffffffe5 01782e00 00000004
Nov 27 07:46:08 gate-isdn kernel: Call Trace: [sys_getdents+150/200]
[filldir+0/164] [system_call+85/124]
Nov 27 07:46:08 gate-isdn kernel: Code: 83 7c 7c 24 00 75 3c 8b 8c 24 9c
00 00 00 8b 51 14 89 d3 89

--
[ Nigel.Metheringham@theplanet.net - Systems Software Engineer ]
[ Tel : +44 113 251 6012 Fax : +44 113 234 6065 ]
[ Real life is but a pale imitation of a Dilbert strip ]



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