RE: [Xen-devel] Kernel BUG at "arch/xen/x86_64/mm/hypervisor.c":198

["Ian Pratt" <m+Ian.Pratt@xxxxxxxxxxxx>]

> I finally managed to get my first real box for Xen -- and now 
> I'm in trouble ;-)
> 
> run Xen-3.0 on an Dual-Opteron Dual-Core box with SUSE 10.0 
> kernel/xen RPMs from current yast online update packages I 
> get the following system crash quite easy within a few 
> minutes (~1-5 min) with only dom0 and running
> ~4-5 processes with just a cpu loop ("while (1) ;")

Please could you try the RPMs under http://xensource.com/xen/ 

We'll then be able to tell whether this is specific to the SUSE kernel
or whether the XenSource one also exhibits it.

Thanks,
Ian 
 
> here is the most complete information I got from syslog so far:
> 
>       kernel: ----------- [cut here ] --------- [please bite 
> here ] ---------
>       kernel: Kernel BUG at "arch/xen/x86_64/mm/hypervisor.c":198
>       kernel: invalid operand: 0000 [1] 
>       kernel: CPU 0 
>       kernel: Modules linked in: bridge ipv6 button battery 
> ac af_packet tg3 ohci_hcd usbcore i2c_amd8111 i2c_amd756 
> i2c_core hw_random generic parport_pc lp parport ext3 jbd 
> dm_mod reiserfs fan thermal processor sg ide_cd cdrom aic79xx 
> scsi_transport_spi amd74xx sd_mod scsi_mod ide_disk ide_core
>       kernel: Pid: 7082, comm: mybuffer Not tainted 2.6.13-15-xen
>       kernel: RIP: e030:[<ffffffff8011f987>] 
> <ffffffff8011f987>{xen_pgd_pin+71}
>       kernel: RSP: e02b:ffff88000f9b7b28  EFLAGS: 00010282
>       kernel: RAX: 00000000ffffffea RBX: ffff88001f08a040 
> RCX: ffffffff8011f983
>       kernel: RDX: 0000000000000000 RSI: 0000000000000001 
> RDI: ffff88000f9b7b28
>       kernel: RBP: ffff88000f9b7c08 R08: 0000000000000003 
> R09: 0000000000000000
>       kernel: R10: 0000000000007ff0 R11: 0000000000000246 
> R12: ffff88001d3d0e80
>       kernel: R13: ffff8800016d77f0 R14: 000000ae03419fd2 
> R15: ffff88001a2eb8f8
>       kernel: FS:  00002aaaac4001a0(0000) 
> GS:ffffffff804bbe80(0000) knlGS:00000000556ac6c0
>       kernel: CS:  e033 DS: 0000 ES: 0000
>       kernel: Process mybuffer (pid: 7082, threadinfo 
> ffff88000f9b6000, task ffff88001a2eb6e0)
>       kernel: Stack: ffff880000000003 00000000000b5eb6 
> ffff8800016d77f0 000000ae03419fd2 
>       kernel:        ffff88001a2eb8f8 ffffffff8011ea75 
> ffff88001f08a040 ffffffff80348ddd 
>       kernel:        00000000000010da ffff88001a2eb6e0 
>       kernel: Call Trace:<ffffffff8011ea75>{mm_pin+325} 
> <ffffffff80348ddd>{schedule+1261}
>       kernel:        <ffffffff801572e0>{sync_page+0} 
> <ffffffff803490af>{io_schedule+15}
>       kernel:        <ffffffff8015731b>{sync_page+59} 
> <ffffffff80349bb1>{__wait_on_bit_lock+65}
>       kernel:        <ffffffff8015740f>{__lock_page+95} 
> <ffffffff801488c0>{wake_bit_function+0}
>       kernel:        <ffffffff80157685>{find_get_page+21} 
> <ffffffff80158f5f>{do_generic_mapping_read+479}
>       kernel:        <ffffffff80157860>{file_read_actor+0} 
> <ffffffff80159a90>{__generic_file_aio_read+384}
>       kernel:        
> <ffffffff80159c8b>{generic_file_read+187} 
> <ffffffff80156184>{__do_IRQ+244}
>       kernel:        <ffffffff80115369>{do_IRQ+57} 
> <ffffffff8010de16>{evtchn_do_upcall+118}
>       kernel:        
> <ffffffff80148760>{autoremove_wake_function+0} 
> <ffffffff8017ace5>{vfs_read+229}
>       kernel:        <ffffffff8017b4c3>{sys_read+83} 
> <ffffffff8012101b>{ia32_sysret+0}
>       kernel:        <ffffffff80120fa8>{ia32_syscall+0} 
>       kernel: 
>       kernel: Code: 0f 0b a3 58 81 36 80 ff ff ff ff c2 c6 00 
> 48 83 c4 28 c3 66 
>       kernel: RIP <ffffffff8011f987>{xen_pgd_pin+71} RSP 
> <ffff88000f9b7b28>
> 
> 
> unfortuneately I didn't yet manage to get the _full_ crash 
> info for both the hypervisor _and_ the dom0 kernel in syslog, 
> and I'm still wrestling with the serial console when using 
> xen.  right now I only have a "real" 
> screen shot (4 Mpixel;) which shows both information, if this 
> is needed...
> 
> system setup:
> 
>       dual-cpu dual-core AMD Opteron 
>       8 GB ram
>       SUSE 10.0 x86_64 + online update
> 
> 
> running 32bit SUSE 10.0 xen-3.0 doesn't show this crash, only 
> the x86_64 system.
> 
> 
> 
> which other information do you need ?  
> thanks for any pointer & help,
> 
> Harald Koenig
> -- 
> "I hope to die                                      ___       _____
> before I *have* to use Microsoft Word.",           0--,|    /OOOOOOO\
> Donald E. Knuth, 02-Oct-2001 in Tuebingen.        <_/  /  
> /OOOOOOOOOOO\
>                                                     \  
> \/OOOOOOOOOOOOOOO\
>                                                       \ 
> OOOOOOOOOOOOOOOOO|//
> Harald Koenig                                          
> \/\/\/\/\/\/\/\/\/
> science+computing ag                                    //  / 
>     \\  \
> koenig@xxxxxxxxxxxxxxxxxxxx                            ^^^^^  
>      ^^^^^
> 
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> 

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