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Date: Fri, 09 Mar 2007 19:35:25 +0000 From: Simon Arlott <simon@...e.lp0.eu> To: Linux Kernel Mailing List <linux-kernel@...r.kernel.org> CC: netdev@...r.kernel.org Subject: netconsole system freeze when cable unplugged When I unplug the cable the system just stops responding to anything, at all. No message is printed to the console when the cable is plugged back in. [ 0.000000] Linux version 2.6.21-rc3 (byte@...rum) (gcc version 3.4.6 (Gentoo 3.4.6-r1, ssp-3.4.5-1.0, pie-8.7.9)) #3 SMP Fri Mar 9 18:42:22 GMT 2007 [ 0.000000] BIOS-provided physical RAM map: [ 0.000000] sanitize start [ 0.000000] sanitize bail 0 [ 0.000000] BIOS-e801: 0000000000000000 - 000000000009f000 (usable) [ 0.000000] BIOS-e801: 0000000000100000 - 000000000c000000 (usable) [ 0.000000] 192MB LOWMEM available. [ 0.000000] found SMP MP-table at 000fea90 [ 0.000000] Zone PFN ranges: [ 0.000000] DMA 0 -> 4096 [ 0.000000] Normal 4096 -> 49152 [ 0.000000] early_node_map[1] active PFN ranges [ 0.000000] 0: 0 -> 49152 [ 0.000000] DMI not present or invalid. [ 0.000000] Intel MultiProcessor Specification v1.4 [ 0.000000] Virtual Wire compatibility mode. [ 0.000000] OEM ID: COMPAQ Product ID: Workstation APIC at: 0xFEE00000 [ 0.000000] Processor #1 6:1 APIC version 16 [ 0.000000] Processor #0 6:1 APIC version 16 [ 0.000000] I/O APIC #8 Version 17 at 0xFEC00000. [ 0.000000] Enabling APIC mode: Flat. Using 1 I/O APICs [ 0.000000] Processors: 2 [ 0.000000] Allocating PCI resources starting at 10000000 (gap: 0c000000:f4000000) [ 0.000000] Built 1 zonelists. Total pages: 48768 [ 0.000000] Kernel command line: netconsole=9@....168.7.200/eth0,1649@....168.7.255/ console=ttyS0,115200 ip=dhcp root=/dev/nfs init=/bin/bash panic=10 [ 0.000000] Initializing CPU#0 [ 0.000000] PID hash table entries: 1024 (order: 10, 4096 bytes) [ 0.000000] Detected 199.444 MHz processor. [ 485.111206] Console: colour dummy device 80x25 [ 486.218671] Dentry cache hash table entries: 32768 (order: 5, 131072 bytes) [ 486.227388] Inode-cache hash table entries: 16384 (order: 4, 65536 bytes) [ 486.234789] Pentium Pro with Errata#50 detected. Taking evasive action. [ 486.346878] Memory: 189764k/196608k available (1268k kernel code, 6452k reserved, 492k data, 184k init, 0k highmem) [ 486.357430] virtual kernel memory layout: [ 486.357444] fixmap : 0xfffbc000 - 0xfffff000 ( 268 kB) [ 486.357461] vmalloc : 0xcc800000 - 0xfffba000 ( 823 MB) [ 486.357478] lowmem : 0xc0000000 - 0xcc000000 ( 192 MB) [ 486.357494] .init : 0xc02bf000 - 0xc02ed000 ( 184 kB) [ 486.357510] .data : 0xc023d32b - 0xc02b85d0 ( 492 kB) [ 486.357527] .text : 0xc0100000 - 0xc023d32b (1268 kB) [ 486.396031] Checking if this processor honours the WP bit even in supervisor mode... Ok. [ 486.562667] Calibrating delay using timer specific routine.. 400.92 BogoMIPS (lpj=2004624) [ 486.575064] Mount-cache hash table entries: 512 [ 486.587330] CPU: L1 I cache: 8K, L1 D cache: 8K [ 486.591916] CPU: L2 cache: 256K [ 486.595475] Checking 'hlt' instruction... OK. [ 486.633415] Freeing SMP alternatives: 9k freed [ 486.638843] CPU0: Intel Pentium Pro stepping 07 [ 486.644597] lockdep: not fixing up alternatives. [ 486.649256] Booting processor 1/0 eip 2000 [ 486.664153] Initializing CPU#1 [ 486.812607] Calibrating delay using timer specific routine.. 398.91 BogoMIPS (lpj=1994559) [ 486.812755] CPU: L1 I cache: 8K, L1 D cache: 8K [ 486.812781] CPU: L2 cache: 256K [ 486.813992] CPU1: Intel Pentium Pro stepping 07 [ 486.837731] Total of 2 processors activated (799.83 BogoMIPS). [ 486.844201] ExtINT not setup in hardware but reported by MP table [ 486.851035] ENABLING IO-APIC IRQs [ 486.855772] ..TIMER: vector=0x31 apic1=0 pin1=2 apic2=0 pin2=0 [ 487.204372] checking TSC synchronization [CPU#0 -> CPU#1]: passed. [ 487.230906] Brought up 2 CPUs [ 487.888084] migration_cost=6769 [ 487.904092] NET: Registered protocol family 16 [ 487.927495] PCI: PCI BIOS revision 2.10 entry at 0xe07c4, last bus=1 [ 487.933936] PCI: Using configuration type 1 [ 487.938152] Setting up standard PCI resources [ 487.951810] PCI: Probing PCI hardware [ 487.959923] 0000:00:14.1: trying to change BAR0 from 0000 to 01F0 [ 487.966107] 0000:00:14.1: trying to change BAR1 from 0000 to 03F4 [ 487.972246] 0000:00:14.1: trying to change BAR2 from 0000 to 0170 [ 487.978418] 0000:00:14.1: trying to change BAR3 from 0000 to 0374 [ 487.993123] PCI->APIC IRQ transform: 0000:00:08.0[A] -> IRQ 19 [ 487.999018] PCI->APIC IRQ transform: 0000:00:0b.0[A] -> IRQ 16 [ 488.004987] PCI->APIC IRQ transform: 0000:01:0b.0[A] -> IRQ 20 [ 488.010870] PCI->APIC IRQ transform: 0000:01:0c.0[A] -> IRQ 21 [ 488.058792] PCI: Bridge: 0000:00:06.0 [ 488.062512] IO window: 1000-1fff [ 488.065964] Time: tsc clocksource has been installed. [ 488.071119] MEM window: 50000000-501fffff [ 488.075398] PREFETCH window: 10000000-100fffff [ 488.081935] NET: Registered protocol family 2 [ 488.173953] IP route cache hash table entries: 2048 (order: 1, 8192 bytes) [ 488.184036] TCP established hash table entries: 8192 (order: 6, 294912 bytes) [ 488.204285] TCP bind hash table entries: 8192 (order: 6, 262144 bytes) [ 488.223278] TCP: Hash tables configured (established 8192 bind 8192) [ 488.229974] TCP reno registered [ 488.285511] Limiting direct PCI/PCI transfers. [ 488.334179] Real Time Clock Driver v1.12ac [ 488.338328] Hangcheck: starting hangcheck timer 0.9.0 (tick is 180 seconds, margin is 60 seconds). [ 488.347357] Hangcheck: Using get_cycles(). [ 488.351515] Serial: 8250/16550 driver $Revision: 1.90 $ 4 ports, IRQ sharing disabled [ 488.360916] serial8250: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A [ 488.367954] serial8250: ttyS1 at I/O 0x2f8 (irq = 3) is a 16550A [ 488.381717] 8139too Fast Ethernet driver 0.9.28 [ 488.389601] eth0: RealTek RTL8139 at 0x2400, 00:02:44:47:d3:ee, IRQ 19 [ 488.396487] netconsole: device eth0 not up yet, forcing it [ 488.402923] eth0: link up, 100Mbps, full-duplex, lpa 0x45E1 [ 488.423119] netconsole: carrier detect appears untrustworthy, waiting 100 ms [ 489.684118] netconsole: network logging started [ 489.688832] TCP cubic registered [ 489.694506] NET: Registered protocol family 10 [ 489.711251] Starting balanced_irq [ 489.715459] Using IPI Shortcut mode [ 491.242277] Sending DHCP requests ., OK [ 491.292256] IP-Config: Got DHCP answer from 192.168.7.4, my address is 192.168.7.200 [ 491.302672] IP-Config: Complete: [ 491.305876] device=eth0, addr=192.168.7.200, mask=255.255.255.0, gw=192.168.7.4, [ 491.314553] host=Compaq_PW5000, domain=lan, nis-domain=(none), [ 491.321130] bootserver=192.168.7.4, rootserver=192.168.7.8, rootpath=/ [ 491.331337] Looking up port of RPC 100003/2 on 192.168.7.8 [ 491.344971] Looking up port of RPC 100005/1 on 192.168.7.8 [ 491.444880] VFS: Mounted root (nfs filesystem) readonly. [ 491.453750] Freeing unused kernel memory: 184k freed [ 491.459420] Write protecting the kernel read-only data: 346k [ 565.518226] eth0: link down -- Simon Arlott - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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