[DRBD-user] Kernel error with Linux 2.6, Xen 3.0, and DRBD on AMD64

[Roy Keene]

All,

 	Attempting to start DRBD (using the supplied SysV init script) 
causes my kernel to become very unhappy and emit the enclosed message.

I'm using Xen 3.0 (which uses a patched Linux 2.6.12.6 kernel), Slamd64 
10.2, DRBD 0.7.14

Any ideas on resolving this issue ?


Kernel message emited:
Unable to handle kernel paging request at ffff81000642f01c RIP:<ffffffff8807a640>{:drbd:drbd_md_read+480}
PGD 6b70063 PUD a42067 PMD 0
Oops: 0000 [1]
CPU 0
Modules linked in: drbd iptable_filter ip_tables bridge md5 ipv6 forcedeth
Pid: 21476, comm: drbdsetup Not tainted 2.6.12.6-xen0
RIP: e030:[<ffffffff8807a640>] <ffffffff8807a640>{:drbd:drbd_md_read+480}
RSP: e02b:ffff88000698d9c8  EFLAGS: 00010202
RAX: 0000000000000001 RBX: ffff880002b3b000 RCX: ffff88000698d8d0
RDX: 0000000000000001 RSI: ffff880002eeb480 RDI: ffff8800012b52c0
RBP: ffff880002b3b638 R08: ffff88000698c000 R09: 00000000005c2238
R10: 0000000000007ff0 R11: ffffffff80152930 R12: ffff81000642f000
R13: ffff880003f16cc0 R14: ffff880007354280 R15: ffff880002b3b150
FS:  00002aaaaadfbb00(0000) GS:ffffffff804d9200(0000) 
knlGS:ffffffff8038c700
CS:  e033 DS: 0000 ES: 0000
Process drbdsetup (pid: 21476, threadinfo ffff88000698c000, task 
ffff8800073582f0)
Stack: 0000000000000010 ffff880003f16cc0 ffff880002b3b000 ffffffff8806987e
        ffff880006d0b778 ffff880006635680 00007fffff85ecc0 ffffffff8016001d
        00000000439f5263 00000000186d6d39
Call Trace:<ffffffff8806987e>{:drbd:drbd_ioctl+2222} <ffffffff8016001d>{do_no_page+541}
        <ffffffff801a28a0>{proc_alloc_inode+64} <ffffffff80187552>{alloc_inode+18}
        <ffffffff801a3fa6>{proc_pid_make_inode+54} <ffffffff801a468e>{proc_pid_lookup+382}
        <ffffffff801c5b53>{pathrelse+51} <ffffffff801b3c78>{reiserfs_read_locked_inode+1272}
        <ffffffff802156d2>{kobject_get+18} <ffffffff80267fac>{get_disk+44}
        <ffffffff802156d2>{kobject_get+18} <ffffffff8025d4a4>{get_device+20}
        <ffffffff80287f6b>{scsi_device_get+43} <ffffffff8029cd01>{sd_open+177}
        <ffffffff80177295>{do_open+581} <ffffffff8017743a>{blkdev_get+138}
        <ffffffff80186abe>{__d_lookup+206} <ffffffff8017c674>{do_lookup+100}
        <ffffffff8017d554>{__link_path_walk+3044} <ffffffff802156d2>{kobject_get+18}
        <ffffffff80267fec>{exact_lock+12} <ffffffff80267b6b>{blkdev_ioctl+1643}
        <ffffffff8017724d>{do_open+509} <ffffffff80178709>{cp_new_stat+233}
        <ffffffff8018162e>{do_ioctl+78} <ffffffff801818cb>{vfs_ioctl+651}
        <ffffffff8018193d>{sys_ioctl+77} <ffffffff80111655>{system_call+117}
        <ffffffff801115e0>{system_call+0}

Code: 41 8b 44 24 1c 0f c8 3d 6a 02 74 83 0f 85 e3 00 00 00 31 c9
RIP <ffffffff8807a640>{:drbd:drbd_md_read+480} RSP <ffff88000698d9c8>
CR2: ffff81000642f01c


"uname -a" output:
Linux master 2.6.12.6-xen0 #4 Tue Dec 13 13:58:35 EST 2005 x86_64 AMD 
Athlon(tm) 64 Processor 3500+ AuthenticAMD GNU/Linux

Contents of "/proc/cpuinfo":
processor       : 0
vendor_id       : AuthenticAMD
cpu family      : 15
model           : 47
model name      : AMD Athlon(tm) 64 Processor 3500+
stepping        : 2
cpu MHz         : 2211.332
cache size      : 512 KB
fpu             : yes
fpu_exception   : yes
cpuid level     : 1
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 syscall nx mmxext fxsr_opt lm 3dnowext 3dnow pni lahf_lm
bogomips        : 4417.12
TLB size        : 1024 4K pages
clflush size    : 64
cache_alignment : 64
address sizes   : 40 bits physical, 48 bits virtual
power management: ts fid vid ttp tm stc

 	Roy Keene
 	Planning Systems Inc