Hello listers, Our datawarehouse machine suffers from a kernel bug. In the past year we have had this issue, sometimes even every week. Usually the bug appears when performing an archive but it also happens at other times. In all cases the machine has a high IO load. We have upgraded the kernel but that did not help in solving the error. Anyone have the same problems, especially with regard to Oracle systems? Any help or suggestions would be appreciated. System: SLES 9 SP4, Kernel 2.6.5-7. Oracle 10.1.0.5.0. Message from /var/log/messages: kernel: kernel BUG at fs/aio.c:733! kernel: illegal operation: 0001 [#1] kernel: CPU: 0 Not tainted (2.6.5-7.315-s390x SLES9_SP4_BRANCH-200811261403180100) kernel: Process oracle (pid: 24794, task: 0000000144b81858, ksp: 00000000dd52b630) kernel: Krnl PSW : 0700000180000000 00000000001d2eaa (__aio_run_iocbs+0x1a2/0x39c) kernel: Krnl GPRS: 0000000000000008 0000000000000000 000000000000001f 0000000000134d62 kernel: 00000000001d2ea8 0000000000000000 00000000001d3b26 0000000000000000 kernel: 00000000001d39ca 0000000000002000 000000013f7da300 000000013f7da300 kernel: 0000000039bb8900 0000000000378ac0 00000000001d2ea8 00000000dd52bc60 kernel: Krnl Code: 00 00 b9 04 00 2c b9 04 00 39 a7 49 00 00 c0 e5 ff ff fd d0 kernel: Call Trace: kernel: [<00000000001d39ca>] io_submit_one+0x1b6/0x268 kernel: [<00000000001d3b26>] sys_io_submit+0xaa/0x13c kernel: [<000000000011fc9c>] sysc_noemu+0x10/0x16
I did find a discussion on the aio.c. More in detail, in the routine
aio_read_evt there was a discussion on the line
spin_lock(&info->ring_lock) and it looks like this is exactly the
location where we get our bug. When I look at the kernel levels, even up
to the most current level, the code has not been changed yet.
Met vriendelijke groet/With kind regards,
Berry van Sleeuwen
Flight Forum 3000 5657 EW Eindhoven
( +31 (0)6 22564276
Atos Origin <http://www.atosorigin.com/>
MO OC Mainframe Services
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