Re: [Iscsitarget-devel] Module crash, anyone know the cause?

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Dist: 2.6.34.7-56.fc13.x86_64 (Fedora 13)
Iscsi-target version 1.4.20.2 with patch for 128k chunks (http://www.lessfs.com/wordpress/wp-content/software/iscsitarget-1.4.20.1.patch)

Running Lessfs for de-duplication, iscsi-volumes are exported to VMWare and connected directly to Windows 2008VM's

This crash was at high workload (backup exec)

-----Original Message-----
From: Arne Redlich [mailto:arn...@go...] 
Sent: Tuesday, September 28, 2010 8:30 AM
To: Morten Bøhmer
Cc: isc...@li...
Subject: Re: [Iscsitarget-devel] Module crash, anyone know the cause?

Morten,

Can you pls. give us some more info, i.e. IET version, config, workload?

Thanks,
Arne

2010/9/28 Morten Bøhmer <mo...@ad...>:
>
>
> BUG: unable to handle kernel NULL pointer dereference at 
> 000000000000001d
> IP: [<ffffffffa02aad86>] disk_execute_cmnd+0x85/0x244 [iscsi_trgt] PGD 
> 2c5473067 PUD 3108b6067 PMD 0
> Oops: 0000 [#1] SMP
> last sysfs file: /sys/module/iscsi_trgt/initstate CPU 0 Modules linked 
> in: iscsi_trgt crc32c_intel fuse ipv6 snd_hda_codec_realtek 
> snd_hda_intel snd_hda_codec snd_hwdep snd_seq snd_seq_device snd_pcm 
> iTCO_wdt xhci_hcd r8169 e1000e shpchp iTCO_vendor_support snd_timer 
> snd soundcore serio_raw i2c_i801 snd_page_alloc mii pata_acpi 
> ata_generic arcmsr
> pata_it8213 nouveau ttm drm_kms_helper drm i2c_algo_bit video output 
> i2c_core [last unloaded: scsi_wait_scan]
>
> Pid: 1849, comm: istiod1 Not tainted 2.6.34.7-56.fc13.x86_64 #1
> P55A-UD3/P55A-UD3
> RIP: 0010:[<ffffffffa02aad86>]  [<ffffffffa02aad86>]
> disk_execute_cmnd+0x85/0x244 [iscsi_trgt]
> RSP: 0018:ffff8802c54d7e50  EFLAGS: 00010286
> RAX: 0000000000000000 RBX: ffff8800bb886af8 RCX: ffff8800bb8863a8
> RDX: ffff88030cebf0b8 RSI: 0000000000000000 RDI: ffff88030cebf0b0
> RBP: ffff8802c54d7e60 R08: 0000000000000000 R09: 0000000000000004
> R10: 0000000000000000 R11: 00000000000153c0 R12: ffff8800bb886b30
> R13: ffff880310648000 R14: ffff88030cebc000 R15: ffff88030e0a7b58
> FS:  0000000000000000(0000) GS:ffff880002000000(0000) 
> knlGS:0000000000000000
> CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
> CR2: 000000000000001d CR3: 00000002c5472000 CR4: 00000000000006f0
> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 
> Process istiod1 (pid: 1849, threadinfo ffff8802c54d6000, task
> ffff880310648000)
> Stack:
>  ffff88030e0a7b40 ffff880310648000 ffff8802c54d7ee0 ffffffffa02a7054 
> <0> 00000000000153c0 ffff88030e0a7b68 0000000000000000 
> ffff880310648000 <0> ffffffff8104818d ffff8802c5659e98 
> ffff8802c5e01e98 0000000000000000 Call Trace:
>  [<ffffffffa02a7054>] worker_thread+0x12e/0x260 [iscsi_trgt]
>  [<ffffffff8104818d>] ? default_wake_function+0x0/0x14
>  [<ffffffffa02a6f26>] ? worker_thread+0x0/0x260 [iscsi_trgt]
>  [<ffffffff81065cd9>] kthread+0x7f/0x87
>  [<ffffffff8100aa64>] kernel_thread_helper+0x4/0x10
>  [<ffffffff81065c5a>] ? kthread+0x0/0x87
>  [<ffffffff8100aa60>] ? kernel_thread_helper+0x0/0x10
> Code: 7a 10 8b 30 ba 3f 00 00 00 e8 d9 22 00 00 48 89 c7 e8 5b 22 00 
> 00 eb
> 38 48 8b 53 28 48 8b 43 30 48 8b 7a 10 8b 30 e8 a1 23 00 00 <0f> b6 48 
> 1d 0f
> b6 50 1c 49 89 c4 48 89 df be 06 00 00 00 e8 6a RIP  
> [<ffffffffa02aad86>] disk_execute_cmnd+0x85/0x244 [iscsi_trgt]
>  RSP <ffff8802c54d7e50>
> CR2: 000000000000001d
> ---[ end trace 51e2e0b2f5637192 ]---
>
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