Re: [Xen-devel] kernel oops with driver domains: usb ohci Fatal DMA error! Please use 'swiotlb=force'

[Hans-Christian Armingeon <mog.johnny@xxxxxxx>]

Hi,

I still have problems.

Am Montag, 1. Mai 2006 13:12 schrieb Muli Ben-Yehuda:
> On Fri, Apr 28, 2006 at 04:40:27PM +0200, Hans-Christian Armingeon wrote:
> > Hi,
> > 
> > I am havong trouble exporting a pci device to a domU.
> > The kernel oopses quite early at boot.
> > 
> > How can I fix this?
> 
> Try passing swiotlb=force on the command line.

When I add extra="swiotlb=force" to the domain configuration, I get this error.

[    0.000000] Bootdata ok (command line is  
ip=192.168.5.51:1.2.3.4:192.168.5.15:255.255.255.0::eth0:off root=/dev/sda1 ro 
swiotlb=force)
[    0.000000] Linux version 2.6.16-xen-20060428.5-xen0 (root@polydeuces) (gcc 
version 4.0.3 (Ubuntu 4.0.3-1ubuntu4)) #1 Fri Apr 28 15:07:47 CEST 2006
[  406.712143] No mptable found.
[  406.716994] Built 1 zonelists
[  406.717000] Kernel command line:  
ip=192.168.5.51:1.2.3.4:192.168.5.15:255.255.255.0::eth0:off root=/dev/sda1 ro 
swiotlb=force
[  406.718765] Initializing CPU#0
[  406.718891] PID hash table entries: 4096 (order: 12, 131072 bytes)
[  406.719014] Xen reported: 2189.786 MHz processor.
[  406.720589] Dentry cache hash table entries: 131072 (order: 8, 1048576 bytes)
[  406.721453] Inode-cache hash table entries: 65536 (order: 7, 524288 bytes)
[  406.879058] ----------- [cut here ] --------- [please bite here ] ---------
[  406.879070] Kernel BUG at lib/../arch/i386/kernel/swiotlb.c:152
[  406.879075] invalid opcode: 0000 [1]
[  406.879079] CPU 0
[  406.879081] Modules linked in:
[  406.879085] Pid: 0, comm: swapper Not tainted 2.6.16-xen-20060428.5-xen0 #1
[  406.879089] RIP: e030:[<ffffffff80243e03>] 
<ffffffff80243e03>{swiotlb_init_with_default_size+147}
[  406.879101] RSP: e02b:ffffffff804fff80  EFLAGS: 00010282
[  406.879105] RAX: 00000000fffffff4 RBX: 0000000004000000 RCX: 000000000000000e
[  406.879109] RDX: ffffffffff578000 RSI: 0000000000000001 RDI: ffffffff804fff00
[  406.879113] RBP: 0000000000000000 R08: ffffffff804fff30 R09: 0000000000004000
[  406.879117] R10: 0000000000007ff0 R11: ffffffff804b4354 R12: 0000000000000000
[  406.879122] R13: ffffffff8034127b R14: 0000000000000000 R15: ffff880000000000
[  406.879129] FS:  0000000000000000(0000) GS:ffffffff804eb000(0000) 
knlGS:0000000000000000
[  406.879132] CS:  e033 DS: 0000 ES: 0000
[  406.879136] Process swapper (pid: 0, threadinfo ffffffff804fe000, task 
ffffffff803adc00)
[  406.879139] Stack: 0000000000000094 ffffffff80114112 ffff880000000000 
ffffffff8050b3ff
[  406.879147]        0000000000020000 0000000000000000 0000000000000000 
0000000000000000
[  406.879153]        0000000000000000 0000000000000000
[  406.879156] Call Trace: <ffffffff80114112>{pci_swiotlb_init+6} 
<ffffffff8050b3ff>{mem_init+127}
[  406.879170]        <ffffffff8050161a>{start_kernel+321} 
<ffffffff805010de>{_sinittext+222}
[  406.879181]
[  406.879182] Code: 0f 0b 68 17 33 37 80 c2 98 00 48 8b 3d dc 53 27 00 be 80 00
[  406.879195] RIP <ffffffff80243e03>{swiotlb_init_with_default_size+147} RSP 
<ffffffff804fff80>
[  406.879203]  <0>Kernel panic - not syncing: Attempted to kill the idle task!


I added the same Option to the dom0 kernel. Is that neccessary?

Johnny

> 
> > [509111.024333] Fatal DMA error! Please use 'swiotlb=force'
> > [509111.024344] ----------- [cut here ] --------- [please bite here ] 
> > ---------
> > [509111.024347] Kernel BUG at 
> > arch/x86_64/kernel/../../i386/kernel/pci-dma-xen.c:309
> 
> Cheers,
> Muli
> 
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