* royer fabien ([email protected]) wrote: > HI, > > I am using the Beagle board using an ARM cortexA8 prosessor. > I found one annoying issue while using lttv-gui. The issue is that my > ethernet connection is always disconnected after exporting the DISPLAY and > examining the trace. > > The beagle board doens't have a display so you need to export thought the > ethernet. And the Beagleboard doesn't have an ethernet port so you need to > use the USB host and plug a usb2eth adaptor. >
It looks like a mainline bug. Can you reproduce it on the mainline kernel without the lttng patchset ? If yes, then it should be reported to lkml and/or omap developers. Also, knowing the lttng branch you are using would be useful in this bug report. Thanks, Mathieu > I am using the git : > git://git.kernel.org/pub/scm/linux/kernel/git/compudj/linux-2.6-lttng.git > config: /arch/arm/config/omap3_beagle_defconfig > > From my investigation the file Drivers/usb/core/hub.c line 3343 must be buggy > but I didnot find the bug myself. So I am asking for help. > > Oops errror found: > > r...@beagleboard:~# hub 1-0:1.0: port 2 disabled by hub (EMI?), re-enabling... > Unable to handle kernel NULL pointer dereference at virtual address 00000034 > pgd = c0004000 > [00000034] *pgd=00000000 > Internal error: Oops: 17 [#1] > last sysfs file: /sys/devices/platform/i2c_omap.3/i2c-3/i2c-dev/i2c-3/uevent > Modules linked in: > CPU: 0 Not tainted (2.6.33.1-ga0ff4c3 #6) > PC is at usb_hcd_unlink_urb+0x48/0x6c > LR is at kobject_get+0x14/0x1c > pc : [<c022cfcc>] lr : [<c01a9fdc>] psr: 60000013 > sp : cf90be98 ip : 00000004 fp : cfbb4c00 > r10: cfbb4de0 r9 : cfbc8000 r8 : cf930324 > r7 : fffffffe r6 : 60000013 r5 : 00000000 r4 : cf3c5240 > r3 : 00000000 r2 : fffffffe r1 : cf3c5240 r0 : cf990400 > Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment kernel > Control: 10c5387d Table: 8f3bc019 DAC: 00000017 > Process khubd (pid: 131, stack limit = 0xcf90a2e8) > Stack: (0xcf90be98 to 0xcf90c000) > be80: cf3c524c cf3c5240 > bea0: cf930318 cf930324 cfbc8000 c022db84 cf3c5240 cf930324 cfbc8000 c022c870 > bec0: cf3c5240 cf930318 cf3c5240 cf930318 cf930324 c022c928 cf990400 cf930318 > bee0: 00000001 cf99047c cf990468 c022e600 cf990400 00000003 0000001f c022e62c > bf00: cf990400 cf99049c 0000001f c022a034 cf9246c0 00000002 00000002 cfbb4c00 > bf20: 00000501 cfbc8000 ffffffed c022a6fc cf90bf64 cf8e9270 cf8e9270 00000001 > bf40: cf9247e0 cf99049c cf9247e0 00000002 00000001 cfbb4c04 cf9246c1 00000000 > bf60: cf90a000 cf924704 cf9247c0 cf92470c cf92475c cf9246c8 cfbb4c9c 00000009 > bf80: cf924708 cf924700 00000000 cf8e9240 c006dc58 cf90bf94 cf90bf94 c0072394 > bfa0: 05010002 cf90a000 cf90bfcc cf823f68 cf90bfd4 c022a2bc 00000000 00000000 > bfc0: 00000000 00000000 00000000 c006d854 00000000 00000000 cf90bfd8 cf90bfd8 > bfe0: 00000000 00000000 00000000 00000000 00000000 c002ddac 00000000 00000000 > [<c022cfcc>] (usb_hcd_unlink_urb+0x48/0x6c) from [<c022db84>] > (usb_kill_urb+0x48/0xec) > [<c022db84>] (usb_kill_urb+0x48/0xec) from [<c022c928>] > (usb_hcd_flush_endpoint+0xac/0xc4) > [<c022c928>] (usb_hcd_flush_endpoint+0xac/0xc4) from [<c022e600>] > (usb_disable_endpoint+0x6c/0x84) > [<c022e600>] (usb_disable_endpoint+0x6c/0x84) from [<c022e62c>] > (usb_disable_device+0x14/0xf0) > [<c022e62c>] (usb_disable_device+0x14/0xf0) from [<c022a034>] > (usb_disconnect+0x88/0xe0) > [<c022a034>] (usb_disconnect+0x88/0xe0) from [<c022a6fc>] > (hub_thread+0x440/0xe38) > [<c022a6fc>] (hub_thread+0x440/0xe38) from [<c006d854>] (kthread+0x78/0x80) > [<c006d854>] (kthread+0x78/0x80) from [<c002ddac>] > (kernel_thread_exit+0x0/0x8) > Code: 1a000009 e5943028 e1a02007 e1a01004 (e5930034) > ---[ end trace ec79f3ceae39486f ]--- > > > > > _______________________________________________ > ltt-dev mailing list > [email protected] > http://lists.casi.polymtl.ca/cgi-bin/mailman/listinfo/ltt-dev -- Mathieu Desnoyers Operating System Efficiency R&D Consultant EfficiOS Inc. http://www.efficios.com _______________________________________________ ltt-dev mailing list [email protected] http://lists.casi.polymtl.ca/cgi-bin/mailman/listinfo/ltt-dev
