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xen-devel
Re: [Xen-devel] kernel messages: alignment check: 0000 [#1] SMP
>>> On 13.11.11 at 20:00, Teck Choon Giam <giamteckchoon@xxxxxxxxx> wrote:
> derefnull[15862]: segfault at 0 ip 000000000804c2eb sp
> 00000000ffb4dfac error 4 in derefnull[8048000+57000]
> divbyzero[15899] trap divide error ip:804d0be sp:ff849e9c error:0 in
> divbyzero[8048000+56000]
> derefnull[7328]: segfault at 0 ip 0000000000407701 sp 00007fff943b1c60
> error 4 in derefnull[400000+77000]
> divbyzero[7345] trap divide error ip:408d05 sp:7fff35784750 error:0 in
> divbyzero[400000+76000]
> derefnull[32738]: segfault at 0 ip 000000000804c2eb sp
> 00000000ffbdbebc error 4 in derefnull[8048000+57000]
> divbyzero[32755] trap divide error ip:804d0be sp:ffc0f53c error:0 in
> divbyzero[8048000+56000]
> derefnull[18732]: segfault at 0 ip 0000000000407701 sp
> 00007fffec69eb30 error 4 in derefnull[400000+77000]
> divbyzero[18841] trap divide error ip:408d05 sp:7fffed159ae0 error:0
> in divbyzero[400000+76000]
> derefnull[10813]: segfault at 0 ip 000000000804c2eb sp
> 00000000ffc17dec error 4 in derefnull[8048000+57000]
> divbyzero[10827] trap divide error ip:804d0be sp:ffdb347c error:0 in
> divbyzero[8048000+56000]
> derefnull[27073]: segfault at 0 ip 0000000000407701 sp
> 00007fff37c6ba00 error 4 in derefnull[400000+77000]
> divbyzero[27087] trap divide error ip:408d05 sp:7fffc93d8ab0 error:0
> in divbyzero[400000+76000]
> derefnull[11819]: segfault at 0 ip 000000000804c2eb sp
> 00000000ffbb9edc error 4 in derefnull[8048000+57000]
> divbyzero[11833] trap divide error ip:804d0be sp:ff9c5a1c error:0 in
> divbyzero[8048000+56000]
> derefnull[28080]: segfault at 0 ip 0000000000407701 sp
> 00007fff5d3045d0 error 4 in derefnull[400000+77000]
> divbyzero[28094] trap divide error ip:408d05 sp:7fff6369ca90 error:0
> in divbyzero[400000+76000]
> derefnull[22199]: segfault at 0 ip 000000000804c2eb sp
> 00000000ffa5f64c error 4 in derefnull[8048000+57000]
> divbyzero[22213] trap divide error ip:804d0be sp:ffb2c92c error:0 in
> divbyzero[8048000+56000]
> derefnull[11755]: segfault at 0 ip 0000000000407701 sp
> 00007fffe0a4a070 error 4 in derefnull[400000+77000]
> divbyzero[11768] trap divide error ip:408d05 sp:7fffaac47410 error:0
> in divbyzero[400000+76000]
> derefnull[3492]: segfault at 0 ip 000000000804c2eb sp 00000000ff9b0a9c
> error 4 in derefnull[8048000+57000]
> divbyzero[3506] trap divide error ip:804d0be sp:ffb387ac error:0 in
> divbyzero[8048000+56000]
> derefnull[25591]: segfault at 0 ip 0000000000407701 sp
> 00007fffc5e82060 error 4 in derefnull[400000+77000]
> divbyzero[25607] trap divide error ip:408d05 sp:7ffff3882660 error:0
> in divbyzero[400000+76000]
Up to here (you're certainly aware) are only indications of application faults.
> alignment check: 0000 [#1] SMP
> last sysfs file: /sys/devices/system/cpu/cpu7/cache/index2/shared_cpu_map
> CPU 7
> Modules linked in: ipv6 dm_mirror dm_region_hash dm_log microcode
> rtc_core rtc_lib pcspkr ext3 jbd dm_mod [last unloaded:
> scsi_wait_scan]
> Pid: 4002, comm: sbcl Not tainted 2.6.32.47-0.choon.sl6 #1
> RIP: e030:[<ffffffff810179ff>] [<ffffffff810179ff>]
> convert_from_fxsr+0x11f/0x13d
> RSP: e02b:ffff8800a8301cb8 EFLAGS: 00050246
Something in the kernel has turned on EFLAGS.AC which, in a 64-bit pv
Xen kernel, must never be done (for it is running itself in ring 3). Tracking
down where this happens may (unless someone can offer a good guess)
require sprinkling around respective WARN_ON()s or BUG_ON()s.
Jan
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