Hi, i just updated to 2.6.20 and Xen 3.1, but the Problem still exists:
SCSI subsystem initialized
PCI: Enabling device 0000:00:00.0 (0000 -> 0003)
ata1: SATA max UDMA/133 cmd 0x9F0 ctl 0xBF2 bmdma 0xE000 irq 23
ata2: SATA max UDMA/133 cmd 0x970 ctl 0xB72 bmdma 0xE008 irq 23
scsi0 : sata_nv
ata1: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
ata1.00: ATA-7, max UDMA/133, 976773168 sectors: LBA48 NCQ (depth 0/32)
ata1.00: ata1: dev 0 multi count 1
ata1.00: configured for UDMA/133
scsi1 : sata_nv
ata2: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
ata2.00: ATA-7, max UDMA/133, 976773168 sectors: LBA48 NCQ (depth 0/32)
ata2.00: ata2: dev 0 multi count 1
ata2.00: configured for UDMA/133
Unable to handle kernel NULL pointer dereference at 0000000000000078 RIP:
[<ffffffff8802e43a>] :scsi_mod:scsi_calculate_bounce_limit+0x15/0x49
PGD 20608067 PUD 1efac067 PMD 0
Oops: 0000 [1] SMP
CPU 0
Modules linked in: sata_nv libata scsi_mod generic ide_core
Pid: 445, comm: modprobe Not tainted 2.6.20-1-xen-amd64 #1
RIP: e030:[<ffffffff8802e43a>] [<ffffffff8802e43a>]
:scsi_mod:scsi_calculate_bounce_limit+0x15/0x49
RSP: e02b:ffff88001efc7ac0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff8800005e06d0 RCX: 0000000000000071
RDX: 0000000000000000 RSI: 0000000000000400 RDI: ffff880000124000
RBP: ffff880000124000 R08: 00000000ffffffff R09: 0000000000000000
R10: ffff88001ef17000 R11: 00000000000001b8 R12: ffff88001ef1c828
R13: ffff880000124000 R14: 0000000000000000 R15: ffff8800206d9440
FS: 00002ad8c56556d0(0000) GS:ffffffff804d8000(0000) knlGS:0000000000000000
CS: e033 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: 0000000000000000 CR3: 000000001eed4000 CR4: 0000000000000660
Process modprobe (pid: 445, threadinfo ffff88001efc6000, task ffff8800014be790)
Stack: ffffffff8802ec4e ffff88001ef1c918 ffff880020690000 ffff88001ef1c800
ffffffff8802ec91 ffff880020690000 ffffffff880307d9 ffff880000124000
0000000000000000 0000000000000000 0000000000000001 0000000000000000
Call Trace:
[<ffffffff8802ec4e>] :scsi_mod:__scsi_alloc_queue+0x4e/0x81
[<ffffffff8802ec91>] :scsi_mod:scsi_alloc_queue+0x10/0x4a
[<ffffffff880307d9>] :scsi_mod:scsi_alloc_sdev+0x122/0x1c4
[<ffffffff88030b1a>] :scsi_mod:scsi_probe_and_add_lun+0x11c/0xa5c
[<ffffffff8035e210>] get_device+0x17/0x1f
[<ffffffff803ee414>] klist_add_tail+0x20/0x48
[<ffffffff8025576a>] kobject_get+0x12/0x17
[<ffffffff8035e210>] get_device+0x17/0x1f
[<ffffffff88031793>] :scsi_mod:scsi_alloc_target+0x247/0x333
[<ffffffff880323fa>] :scsi_mod:__scsi_add_device+0xa4/0xd1
[<ffffffff8805a7fe>] :libata:ata_scsi_scan_host+0x46/0x6f
[<ffffffff880590ae>] :libata:ata_device_add+0x409/0x4cf
[<ffffffff80393453>] pcibios_set_master+0x80/0x84
[<ffffffff8807195c>] :sata_nv:nv_init_one+0x2df/0x333
[<ffffffff8025576a>] kobject_get+0x12/0x17
[<ffffffff803137e4>] pci_device_probe+0x4c/0x74
[<ffffffff8036070e>] really_probe+0x87/0x10c
[<ffffffff803608b6>] __driver_attach+0x0/0x93
[<ffffffff80360910>] __driver_attach+0x5a/0x93
[<ffffffff8035fc42>] bus_for_each_dev+0x43/0x6e
[<ffffffff8035ff8a>] bus_add_driver+0x6b/0x18d
[<ffffffff8031399a>] __pci_register_driver+0x75/0xaa
[<ffffffff80296038>] sys_init_module+0x174b/0x18b8
[<ffffffff8025a606>] system_call+0x86/0x8b
[<ffffffff8025a580>] system_call+0x0/0x8b
Code: 83 78 78 00 75 0c 48 8b 05 c1 65 53 f8 48 c1 e0 0c c3 48 8b
RIP [<ffffffff8802e43a>] :scsi_mod:scsi_calculate_bounce_limit+0x15/0x49
RSP <ffff88001efc7ac0>
CR2: 0000000000000078
udevd-event[442]: run_program: '/sbin/modprobe' abnormal exit
Greets
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