Hi, this is an "AOL" type answer with a twist. I too have seen these types of Hotplug crashes. I got them while injecting EMI disturbances on a USB to serial converter at work (flickering neon lights, 3x table lamp). So it might be that one of your devices (USB?) got an EMI/ESD disturbance which in turn caused hotplug to run, and while forking the device disconnected again and the device context was lost.
I haven't yet tracked down the cause for the bug but I was running a stable (Sarge) system with both the standard 2.4.27 and a 2.4.31 kernel. The .31 kernel was a lot more stable but I still managed to get the hotplug oopses. Sorry if this does not help you David, but it might be interesting to others perhaps. Regards /Jocke David N. Welton wrote: > Package: kernel-image-2.6-k7 > Version: 101 > Severity: normal > > I wasn't doing anything with the machine in question - it's a server, so > I definitely wasn't fooling around with the hardware. The symptoms are > that the hotplug process seems to totally lock up - even trying to read > from its proc/ entry causes problems, meaning that ps, top and friends > hang. > > Looks similar to this: > > https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=142774 > > Jun 11 19:38:38 hecl kernel: c01497e4 > Jun 11 19:38:38 hecl kernel: PREEMPT > Jun 11 19:38:38 hecl kernel: Modules linked in: ipv6 e100 mii via_ircc > irda crc_ccitt capability commoncap ide_cd cdrom g > enrtc ext3 jbd mbcache ide_generic via82cxxx ide_disk ide_core unix font > vesafb cfbcopyarea cfbimgblt cfbfillrect > Jun 11 19:38:38 hecl kernel: CPU: 0 > Jun 11 19:38:38 hecl kernel: EIP: 0060:[anon_vma_link+36/96] Not > tainted > Jun 11 19:38:38 hecl kernel: EFLAGS: 00010202 (2.6.8-2-k7) > Jun 11 19:38:38 hecl kernel: EIP is at anon_vma_link+0x24/0x60 > Jun 11 19:38:38 hecl kernel: eax: d22b6000 ebx: de95a518 ecx: > 282444c7 edx: d711fadc > Jun 11 19:38:38 hecl kernel: esi: d711faa4 edi: d711faf8 ebp: > d201d0e0 esp: d22b7ec4 > Jun 11 19:38:38 hecl kernel: ds: 007b es: 007b ss: 0068 > Jun 11 19:38:38 hecl kernel: Process hotplug (pid: 18397, > threadinfo=d22b6000 task=d2386900) > Jun 11 19:38:38 hecl kernel: Stack: d711faa4 d23ed9a8 c011a3f3 d711faa4 > 000000d0 d6437804 d6638138 d22b6000 > Jun 11 19:38:38 hecl kernel: d6aed6c0 d643781c d6437824 d6437810 > d23ed954 d22b6000 d6aed6a0 01200011 > Jun 11 19:38:38 hecl kernel: d1c4ef10 00000000 de99e220 c011ae0c > 01200011 d1c4ef10 00000500 00000000 > Jun 11 19:38:38 hecl kernel: Call Trace: > Jun 11 19:38:38 hecl kernel: [copy_mm+675/1008] copy_mm+0x2a3/0x3f0 > Jun 11 19:38:38 hecl kernel: [copy_process+972/2864] > copy_process+0x3cc/0xb30 > Jun 11 19:38:38 hecl kernel: [do_fork+80/396] do_fork+0x50/0x18c > Jun 11 19:38:38 hecl kernel: [copy_to_user+62/80] > copy_to_user+0x3e/0x50 > Jun 11 19:38:38 hecl kernel: [sys_llseek+140/192] sys_llseek+0x8c/0xc0 > Jun 11 19:38:38 hecl kernel: [sys_clone+65/80] sys_clone+0x41/0x50 > Jun 11 19:38:38 hecl kernel: [syscall_call+7/11] syscall_call+0x7/0xb > Jun 11 19:38:38 hecl kernel: Code: 89 51 04 89 4e 38 89 5a 04 89 13 ff > 48 14 8b 40 08 a8 08 75 > Jun 11 19:38:38 hecl kernel: <6>note: hotplug[18397] exited with > preempt_count 1 > Jun 11 19:38:38 hecl kernel: [schedule+1148/1168] schedule+0x47c/0x490 > Jun 11 19:38:38 hecl kernel: [call_console_drivers+101/288] > call_console_drivers+0x65/0x120 > Jun 11 19:38:38 hecl kernel: [rwsem_down_read_failed+141/384] > rwsem_down_read_failed+0x8d/0x180 > Jun 11 19:38:38 hecl kernel: [.text.lock.exit+127/245] > .text.lock.exit+0x7f/0xf5 > Jun 11 19:38:38 hecl kernel: [do_page_fault+0/1353] > do_page_fault+0x0/0x549 > Jun 11 19:38:38 hecl kernel: [die+248/256] die+0xf8/0x100 > Jun 11 19:38:38 hecl kernel: [do_page_fault+478/1353] > do_page_fault+0x1de/0x549 > Jun 11 19:38:38 hecl kernel: [buffered_rmqueue+245/464] > buffered_rmqueue+0xf5/0x1d0 > Jun 11 19:38:38 hecl kernel: [mm_init+148/208] mm_init+0x94/0xd0 > Jun 11 19:38:38 hecl kernel: [__alloc_pages+746/848] > __alloc_pages+0x2ea/0x350 > Jun 11 19:38:38 hecl kernel: [fast_clear_page+10/96] > fast_clear_page+0xa/0x60 > Jun 11 19:38:38 hecl kernel: [pte_alloc_one+76/96] > pte_alloc_one+0x4c/0x60 > Jun 11 19:38:38 hecl kernel: [do_page_fault+0/1353] > do_page_fault+0x0/0x549 > Jun 11 19:38:38 hecl kernel: [error_code+45/56] error_code+0x2d/0x38 > Jun 11 19:38:38 hecl kernel: [anon_vma_link+36/96] > anon_vma_link+0x24/0x60 > Jun 11 19:38:38 hecl kernel: [copy_mm+675/1008] copy_mm+0x2a3/0x3f0 > Jun 11 19:38:38 hecl kernel: [copy_process+972/2864] > copy_process+0x3cc/0xb30 > Jun 11 19:38:38 hecl kernel: [do_fork+80/396] do_fork+0x50/0x18c > Jun 11 19:38:38 hecl kernel: [copy_to_user+62/80] > copy_to_user+0x3e/0x50 > Jun 11 19:38:38 hecl kernel: [sys_llseek+140/192] sys_llseek+0x8c/0xc0 > Jun 11 19:38:38 hecl kernel: [sys_clone+65/80] sys_clone+0x41/0x50 > Jun 11 19:38:38 hecl kernel: [syscall_call+7/11] syscall_call+0x7/0xb > > > -- System Information: > Debian Release: 3.1 > APT prefers testing > APT policy: (500, 'testing') > Architecture: i386 (i686) > Kernel: Linux 2.6.8-2-k7 > Locale: LANG=en_US, LC_CTYPE=en_US (charmap=ISO-8859-1) > > Versions of packages kernel-image-2.6-k7 depends on: > ii kernel-image-2.6.8-2-k7 2.6.8-16 Linux kernel image for version > 2.6 > > -- no debconf information > > -- Joachim Nilsson :: <joachim AT vmlinux DOT org> +46(0)21-123348 :: <http://vmlinux.org/joachim/> -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". 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