[Bug 1279403] Re: tg3 driver hangs in iscsi booted initrd : (trusty)
** Patch added: Patch for system hang https://bugs.launchpad.net/ubuntu/+source/linux-ppc/+bug/1279403/+attachment/4121466/+files/video.patch ** Summary changed: - tg3 driver hangs in iscsi booted initrd : (trusty) + udlfd video driver hangs in iscsi booted initrd : (trusty) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1279403 Title: udlfd video driver hangs in iscsi booted initrd : (trusty) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-ppc/+bug/1279403/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1279403] Re: tg3 driver hangs in iscsi booted initrd : (trusty)
i back ported a fix from Alexander Holler: The console functions are using spinlocks while calling fb-driver ops but udlfb waits for a semaphore in many ops. This results in the BUG scheduling while atomic. One of those call flows is e.g. vt_console_print() (spinlock printing_lock) (...) dlfb_ops_imageblit() dlfb_handle_damage() dlfb_get_urb() down_timeout(semaphore) BUG: scheduling while atomic (...) vt_console_print() (release spinlock printing_lock) Fix this through a workqueue for dlfb_handle_damage(). Cc: stable at vger.kernel.org Signed-off-by: Alexander Holler holler at ahsoftware.de And it cured the hang. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1279403 Title: udlfd video driver hangs in iscsi booted initrd : (trusty) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-ppc/+bug/1279403/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1279403] Re: tg3 driver hangs in iscsi booted initrd : (trusty)
Seems the video driver calling timeout in the wrong context is the root cause: [ 45.638269] Call Trace: 4[ 45.638273] [e69a38a0] [c00080bc] show_stack+0xfc/0x1c0 (unreliable) 4[ 45.638277] [e69a38f0] [c07fd050] dump_stack+0x78/0xa0 4[ 45.638285] [e69a3900] [c008eb50] dequeue_task_idle+0x40/0x60 4[ 45.638288] [e69a3910] [c07ebc7c] __schedule+0x4dc/0x780 4[ 45.638292] [e69a3a20] [c07eaf64] schedule_timeout+0x144/0x260 4[ 45.638295] [e69a3a80] [c07ee368] __down_timeout+0x78/0xc0 4[ 45.638299] [e69a3ab0] [c00a1834] down_timeout+0x74/0x80 4[ 45.638303] [e69a3ad0] [c0439f0c] dlfb_get_urb+0x2c/0xc0 4[ 45.638306] [e69a3af0] [c043b5e4] dlfb_handle_damage.isra.3+0xa4/0x1f0 4[ 45.638309] [e69a3b30] [c0419934] soft_cursor+0x1b4/0x2a0 4[ 45.638313] [e69a3b60] [c041935c] bit_cursor+0x52c/0x550 4[ 45.638316] [e69a3bf0] [c0415400] fbcon_cursor+0x130/0x1b0 4[ 45.638319] [e69a3c20] [c046f098] vt_console_print+0x248/0x4a0 4[ 45.638322] [e69a3c70] [c00a6ab0] call_console_drivers.constprop.18+0xf0/0x170 4[ 45.638325] [e69a3c90] [c00a73a4] console_unlock+0x474/0x4a0 4[ 45.638329] [e69a3cc0] [c00a76c4] vprintk_emit+0x2f4/0x500 4[ 45.638332] [e69a3d10] [c0499018] dev_vprintk_emit+0x58/0x70 4[ 45.638336] [e69a3db0] [c0499084] dev_printk_emit+0x54/0x70 4[ 45.638339] [e69a3de0] [c06db0a4] netdev_info+0x74/0x90 4[ 45.638346] [e69a3e20] [f1c6ead8] tg3_link_report+0xb8/0x170 [tg3] 4[ 45.638351] [e69a3e30] [f1c6f888] tg3_test_and_report_link_chg+0x58/0xa0 [tg3] 4[ 45.638358] [e69a3e40] [f1c79ef4] tg3_setup_phy+0xf74/0x2450 [tg3] 4[ 45.638364] [e69a3ee0] [f1c7f6b8] tg3_poll+0x398/0x430 [tg3] 4[ 45.638367] [e69a3f30] [c06d9954] net_rx_action+0x144/0x250 4[ 45.638370] [e69a3f80] [c0055758] __do_softirq+0x118/0x2b0 4[ 45.638374] [e69a3fe0] [c0055d04] irq_exit+0xb4/0xf0 4[ 45.638377] [e69a3ff0] [c000e8d0] call_do_irq+0x24/0x3c 4[ 45.638380] [c0b75e90] [c00054c8] do_IRQ+0x98/0x110 4[ 45.638383] [c0b75eb0] [c0010bfc] ret_from_except+0x0/0x18 4[ 45.638388] --- Exception: 501 at arch_cpu_idle+0x30/0x80 4[ 45.638388] LR = arch_cpu_idle+0x30/0x80 4[ 45.638392] [c0b75f70] [c00b5bd8] rcu_idle_enter+0xb8/0x100 (unreliable) 4[ 45.638395] [c0b75f80] [c00a93a0] cpu_startup_entry+0x160/0x260 4[ 45.638398] [c0b75fc0] [c0a887ec] start_kernel+0x33c/0x350 4[ 45.638401] [c0b75ff0] [c3fc] skpinv+0x2e8/0x324 1[ 45.638412] Unable to handle kernel paging request for instruction fetch 1[ 45.638413] Faulting instruction address: 0x [dumpcommon]kdb -bt Stack traceback for pid 74 0xe62b8000 742 11 R 0xe62b8340 *kworker/1:1 Call Trace: [e63978e0] [c00080bc] show_stack+0xfc/0x1c0 (unreliable) [e6397930] [c00fcb28] kdb_show_stack+0x88/0xb0 [e6397950] [c00fcc04] kdb_bt1.isra.0+0xb4/0x140 [e6397980] [c00fd010] kdb_bt+0x380/0x450 [e6397a10] [c00f9c50] kdb_parse+0x270/0x720 [e6397a60] [c00fa1d4] kdb_exec_defcmd+0xd4/0x140 [e6397a80] [c00f9c50] kdb_parse+0x270/0x720 [e6397ad0] [c00fa7b8] kdb_main_loop+0x348/0x7c0 [e6397b30] [c00fdee8] kdb_stub+0x248/0x4c0 [e6397b70] [c00f2a10] kgdb_cpu_enter+0x3c0/0x6a0 [e6397bd0] [c00f30a0] kgdb_handle_exception+0x1c0/0x220 [e6397c20] [c0011a04] kgdb_debugger+0x94/0xb0 [e6397c30] [c000bd3c] die+0x2ec/0x310 [e6397c60] [c0010a68] handle_page_fault+0x7c/0x80 --- Exception: 400 at (null) LR = ttwu_activate+0x28/0x70 [e6397d30] [c0088e70] ttwu_do_activate+0x50/0x70 [e6397d50] [c0088ff4] sched_ttwu_pending+0x84/0xb0 [e6397d70] [c0089f10] scheduler_ipi+0x60/0x190 [e6397d90] [c00126d0] smp_ipi_demux+0xa0/0xf0 [e6397db0] [c0010250] doorbell_exception+0x70/0xa0 [e6397dd0] [c0010bb0] ret_from_except_full+0x0/0x4c --- Exception: 2070 at linkwatch_event+0x0/0x50 LR = process_one_work+0x14c/0x3e0 [e6397e90] [c006fef8] process_one_work+0x128/0x3e0 (unreliable) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1279403 Title: tg3 driver hangs in iscsi booted initrd : (trusty) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-ppc/+bug/1279403/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1279403] Re: tg3 driver hangs in iscsi booted initrd : (trusty)
Looking at EPC - of 0x885ac - could *p be null ?
R31 = c0b0b340 ; no
static void ttwu_activate(struct rq *rq, struct task_struct *p, int en_flags)
{
activate_task(rq, p, en_flags);
c008859c: 7f c3 f3 78 mr r3,r30
c00885a0: 7f e4 fb 78 mr r4,r31
c00885a4: 38 a0 00 05 li r5,5
c00885a8: 4b ff fb 39 bl c00880e0 activate_task
p-on_rq = 1;
/* if a worker is waking up, notify workqueue */
if (p-flags PF_WQ_WORKER)
c00885ac: 81 3f 00 0c lwz r9,12(r31)
}
[1]kdb md c0b0b340
0xc0b0b340 0100 c0b74000 0002 0020 ..@.. ..
0xc0b0b350 e62b9d00 .+..
0xc0b0b360 fffeee67 0001 ...g
0xc0b0b370 0078 0078 0078 ...x...x...x
0xc0b0b380 c0817520 0400 0040
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Title:
tg3 driver hangs in iscsi booted initrd : (trusty)
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[Bug 1279403] Re: tg3 driver hangs in iscsi booted initrd : (trusty)
I enabled kgdboc=ttyS0,115200 and caught this : [ 71.145241] input: Barcode Reader as /devices/ffe00.soc/ffe21.usb/fsl-ehci.0/usb1/1-1/1-1.3/1-1.3:1.1/input/input1 [ 71.145493] hid-generic 0003:13BA:0018.0002: input,hidraw1: USB HID v1.10 Mouse [Barcode Reader ] on usb-fsl-ehci.0-1.3/input1 [ 71.206233] md: raid6 personality registered for level 6 [ 71.206235] md: raid5 personality registered for level 5 [ 71.206236] md: raid4 personality registered for level 4 [ 71.260531] md: raid10 personality registered for level 10 [ 71.664609] udlfb: DisplayLink USB device /dev/fb0 attached. 1440x900 resolution. Using 5064K framebuffer memory [ 71.934176] IPv6: ADDRCONF(NETDEV_UP): eth2: link is not ready [ 72.083988] IPv6: ADDRCONF(NETDEV_UP): eth3: link is not ready [ 73.549288] tg3 :01:00.0 eth2: Link is up at 100 Mbps, full duplex Entering kdb (current=0xe62b8000, pid 74) on processor 1 Oops: (null) due to oops @ 0x0 dCPU: 1 PID: 74 Comm: kworker/1:1 Tainted: GW3.13.9+ #3 dWorkqueue: events linkwatch_event dtask: e62b8000 ti: e6396000 task.ti: e6396000 NIP: LR: c00885ac CTR: REGS: e6397ca0 TRAP: 0400 Tainted: GW (3.13.9+) MSR: 00021002 CE,ME CR: 22ad2e28 XER: GPR00: c00885ac e6397d50 e62b8000 d1826900 c0b0b340 0005 448130bc 0011 GPR08: 0011 204c2f00 c0078250 e62c7920 GPR16: d1826680 GPR24: c0b6 10d2 c0b06900 c0b06900 c0b80e18 e6396000 d1826900 c0b0b340 NIP [] (null) LR [c00885ac] ttwu_do_activate.constprop.70+0x4c/0x90 Call Trace: [e6397d50] [c00885ac] ttwu_do_activate.constprop.70+0x4c/0x90 (unreliable) [e6397d60] [c0089d80] scheduler_ipi+0xb0/0x1e0 [e6397d90] [c00126d0] smp_ipi_demux+0xa0/0xf0 [e6397db0] [c0010250] doorbell_exception+0x70/0xa0 [e6397dd0] [c0010bb0] ret_from_except_full+0x0/0x4c --- Exception: 2070 at linkwatch_event+0x0/0x50 LR = process_one_work+0x14c/0x3e0 [e6397e90] [c006fef8] process_one_work+0x128/0x3e0 (unreliable) [e6397ec0] [c00708d4] worker_thread+0x134/0x3e0 [e6397ef0] [c0078324] kthread+0xd4/0xf0 [e6397f40] [c001068c] ret_from_kernel_thread+0x5c/0x64 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1279403 Title: tg3 driver hangs in iscsi booted initrd : (trusty) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-ppc/+bug/1279403/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1279403] Re: tg3 driver hangs in iscsi booted initrd : (trusty)
** Summary changed: - tg3 driver hangs in iscsi booted initrd : (saucy) + tg3 driver hangs in iscsi booted initrd : (trusty) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1279403 Title: tg3 driver hangs in iscsi booted initrd : (trusty) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-ppc/+bug/1279403/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
