Hi, my kernel also has some problems, using latest 2.6.18-4-xen-amd64 in stable:
Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2
ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
SCSI subsystem initialized
PCI: Enabling device 0000:00:00.0 (0000 -> 0003)
ata1: SATA max UDMA/133 cmd 0x9F0 ctl 0xBF2 bmdma 0xE000 irq 17
ata2: SATA max UDMA/133 cmd 0x970 ctl 0xB72 bmdma 0xE008 irq 17
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 0
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 0
ata2.00: configured for UDMA/133
Unable to handle kernel NULL pointer dereference at 0000000000000078 RIP:
[<ffffffff8802e3a2>] :scsi_mod:scsi_calculate_bounce_limit+0x15/0x49
PGD 20653067 PUD 1ed1c067 PMD 0
Oops: 0000 [1] SMP
CPU 0
Modules linked in: sata_nv libata scsi_mod generic ide_core
Pid: 489, comm: modprobe Not tainted 2.6.18-4-xen-amd64 #1
RIP: e030:[<ffffffff8802e3a2>] [<ffffffff8802e3a2>]
:scsi_mod:scsi_calculate_bounce_limit+0x15/0x49
RSP: e02b:ffff8800206bbaf0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff88001ecc0670 RCX: 0000000000000071
RDX: 0000000000000067 RSI: 0000000000000400 RDI: ffff88001ea50000
RBP: ffff88001ea50000 R08: 00000000ffffffff R09: 00000000000041ed
R10: ffffffff8802f8d0 R11: 0000000000000048 R12: ffff88001e92f828
R13: ffff88001ea50000 R14: 0000000000000000 R15: 0000000000000000
FS: 00002b4808bf06d0(0000) GS:ffffffff804c4000(0000) knlGS:0000000000000000
CS: e033 DS: 0000 ES: 0000
Process modprobe (pid: 489, threadinfo ffff8800206ba000, task ffff88001ec947f0)
Stack: ffffffff8802e9f2 ffff8800207ed000 ffff8800207ed000 ffff88001e92f800
ffffffff88030641 ffff88001ea50168 000000018802a1fe ffff88001ea50000
0000000000000000 0000000000000000
Call Trace:
[<ffffffff8802e9f2>] :scsi_mod:scsi_alloc_queue+0x65/0xb6
[<ffffffff88030641>] :scsi_mod:scsi_alloc_sdev+0x12e/0x1d2
[<ffffffff88030870>] :scsi_mod:scsi_probe_and_add_lun+0x10d/0x9c6
[<ffffffff8803146c>] :scsi_mod:scsi_alloc_target+0x21e/0x327
[<ffffffff88031dcd>] :scsi_mod:__scsi_add_device+0x77/0xa3
[<ffffffff8805744d>] :libata:ata_scsi_scan_host+0x46/0x6f
[<ffffffff880569b8>] :libata:ata_device_add+0x724/0x7e4
[<ffffffff8806d4f5>] :sata_nv:nv_init_one+0x176/0x1c9
[<ffffffff80311a5a>] pci_device_probe+0x4c/0x75
[<ffffffff8035cffb>] driver_probe_device+0x52/0xa8
[<ffffffff8035d0b6>] __driver_attach+0x0/0x9a
[<ffffffff8035d106>] __driver_attach+0x50/0x9a
[<ffffffff8035d0b6>] __driver_attach+0x0/0x9a
[<ffffffff8035ca78>] bus_for_each_dev+0x43/0x6e
[<ffffffff8035c6ba>] bus_add_driver+0x7e/0x130
[<ffffffff80311bf5>] __pci_register_driver+0x57/0x7d
[<ffffffff8029774e>] sys_init_module+0x16cc/0x1882
[<ffffffff8025c72e>] system_call+0x86/0x8b
[<ffffffff8025c6a8>] system_call+0x0/0x8b
Code: 83 78 78 00 75 0c 48 8b 05 59 fa 51 f8 48 c1 e0 0c c3 48 8b
RIP [<ffffffff8802e3a2>] :scsi_mod:scsi_calculate_bounce_limit+0x15/0x49
RSP <ffff8800206bbaf0>
CR2: 0000000000000078
udevd-event[486]: run_program: '/sbin/modprobe' abnormal exit
Greets
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