Red Hat Bugzilla – Bug 218687
Erratic SCSI tape problem - kernel BUG at mm/slab.c:594
Last modified: 2008-04-04 11:52:35 EDT
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Description of problem:
Tape drive becomes unusable after 5-10 minutes of playing with it. I found the
"kernel BUG at mm/slab.c:594!" error below. I think this bug is affecting more than tapes or scsi, as other people with other devices have mentioned
"kernel BUG at mm/slab.c:594!" I'll include references below.
This just started with the latest FC5 kernel (2.6.18-1.2239.fc5). Several Megariad machines I have also will not boot with the new kernel, but that might not be related.
Bug #217488 mentions a similer error message, but with a USB connection to a phone.
------------[ cut here ]------------
invalid opcode: 0000 [#2]
last sysfs file: /devices/pci0000:03/0000:03:08.1/host1/target1:0:6/1:0:6:0/vend
Modules linked in: ipv6 vmnet(U) vmmon(U) video sbs i2c_ec container button batt
ery asus_acpi ac lp parport_pc parport ohci_hcd floppy st sg serio_raw i2c_piix4
i2c_core cfi_probe gen_probe scb2_flash mtdcore e1000 chipreg map_funcs pcspkr
ide_cd cdrom dm_snapshot dm_zero dm_mirror dm_mod ext3 jbd aacraid aic7xxx scsi_
transport_spi sd_mod scsi_mod
EIP: 0060:[<c045d3ac>] Tainted: P VLI
EFLAGS: 00010206 (2.6.18-1.2239.fc5 #1)
EIP is at kmem_cache_free+0x29/0x62
eax: c001086c ebx: f7ffe860 ecx: f7ff5620 edx: c1800000
esi: f7ffcf40 edi: 00000000 ebp: f21e0124 esp: c8383e28
ds: 007b es: 007b ss: 0068
Process tar (pid: 1219, ti=c8383000 task=f3cde290 task.ti=c8383000)
Stack: f7ffe860 f7ffcf40 00000000 c0448c0e 00000000 def70620 f7ffcf40 def70620
c04653e6 00000800 00000000 c046510c f8843f74 00000800 00000000 00000006
c8383f5c da387660 00000800 00000000 00000002 c1065620 00002000 00000000
[<f8843f74>] scsi_execute_async+0x15a/0x32d [scsi_mod]
[<f8952c57>] st_do_scsi+0x1d1/0x221 [st]
[<f89565d8>] st_read+0x2ed/0x7a6 [st]
DWARF2 unwinder stuck at syscall_call+0x7/0xb
Leftover inexact backtrace:
Code: 5f c3 57 89 d7 8d 92 00 00 00 40 89 c1 c1 ea 0c c1 e2 05 03 15 70 53 79 c0
56 53 8b 02 f6 c4 40 74 03 8b 52 0c 8b 02 84 c0 78 08 <0f> 0b 52 02 e3 f8 61 c0
39 4a 18 74 08 0f 0b 99 0d e3 f8 61 c0
EIP: [<c045d3ac>] kmem_cache_free+0x29/0x62 SS:ESP 0068:c8383e28
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1) Be one of the few people affected by this bug ..
2) have (in my case) a LTO1 tape drive attached to Adaptec AHA-3960D / AIC-7899A U160/m (rev 01) scsi card on a Dell server (unsure which one at this time)
2) Boot to kernel 2.6.18-1.2239.fc5Adaptec AHA-3960D / AIC-7899A U160/m (rev 01)
3) play with tape drive (mt stat; tar blah blah; mt stat; etc..) for 5-10 minutes
Kernel error above prints to screen and tape stops responding
Normal tape operation
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The process we are following is outlined here:
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Fixed in upstream kernel 2.6.21. Sorry I didn't close this bug at that time.