From Bugzilla Helper: User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8.0.8) Gecko/20061108 Fedora/1.5.0.8-1.fc5 Firefox/1.5.0.8 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. References: http://lkml.org/lkml/2006/11/12/63 http://www.mail-archive.com/bcm43xx-dev@lists.berlios.de/msg02470.html http://www.spinics.net/lists/linux-scsi/msg12907.html http://www.spinics.net/lists/linux-scsi/msg12783.html 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 or 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 CPU: 0 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 Call Trace: [<c0448c0e>] mempool_free+0x61/0x66 [<c04653e6>] bio_free+0x25/0x30 [<c046510c>] bio_put+0x27/0x28 [<f8843f74>] scsi_execute_async+0x15a/0x32d [scsi_mod] [<f8952c57>] st_do_scsi+0x1d1/0x221 [st] [<f89565d8>] st_read+0x2ed/0x7a6 [st] [<c04613d8>] vfs_read+0xa6/0x157 [<c0461760>] sys_read+0x41/0x67 [<c0402d9b>] syscall_call+0x7/0xb 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): 2.6.18-1.2239.fc5 How reproducible: Sometimes 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 Actual Results: Kernel error above prints to screen and tape stops responding Expected Results: Normal tape operation Additional info:
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Fixed in upstream kernel 2.6.21. Sorry I didn't close this bug at that time. Thanks.