Hi
On 2017/1/9 22:49, S. Gilles wrote:
On 2017-01-09T09:19:55-0500, S. Gilles wrote:
Hi,
I have a C201, a veyron_speedy device (which uses rk3288) running vanilla
kernels. With recent kernels it will fail to boot (screen is on, with
blinking cursor, but no login prompt and the machine does not respond
over ssh).
I've bisected this to df9bcc2bc0a1f8d2963bd916698268fb2470713b, and
reverting that commit on -mainline gives me a bootable kernel. I can
provide more information as needed.
The fix is on the way,
https://patchwork.kernel.org/patch/9498527/
As I was writing that, I let it sit in the non-booting state for longer
than usual. After about 6 minutes, I got panic output, which I hadn't
observed before. I've transcribed it by hand, so there may be typos.
...
1f40: 60000013 ffffffff
[<c010cdcc>] (__irq_svc) from [<c0108414>] (arch_cpu_idle+0x2c/0x48)
[<c0108414>] (arch_cpu_idle) from [<c07925d8>] (default_idle_call+0x38/0x3c)
[<c07925d8>] (default_idle_call) from [<c01661e0>] (do_idle+0x108/0x1e4)
[<c01661e0>] (do_idle) from [<c016650>] (cpu_startup_entry+0x28/0x2c)
[<c0166550>] (cpu_startup_entry) from [<c078cbfc>] (rest_init+0x70/0x88)
[<c078cbfc>] (rest_init) from [<c9b99d18>] (start_kernel+0x374/0x3f8)
[<c0b00d18>] (start_kernel) from [<0000807c>] (0x807c)
CPU1: stopping
CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.10.0-rc2-EXPERIMENTAL+ #17
Hardware name: Rockchip (Device Tree)
[<c0110938>] (unwind_backtrace) from [<c010c1e8>] (show_stack+0x20/0x24)
[<c010c1e8>] (show_stack) from [<c03cdd3c>] (dump_stack+0x84/0xa0)
[<c03cdd3c>] (dump_stack) from [<c010ee74>] (handle_IPI+0x1c0/0x298)
[<c010ee74>] (handle_IPI) from [<c0101514>] (gic_handle_irq+0x88/0xa4)
[<c0101514>] (gic_handle_irq) from [<c010cdcc>] (__irq_svc+0x6c/0x90)
Exception stack(0xed93bf40 to 0xed93bf88)
bf40: 00000001 00000000 00000000 c011bde0 00000000 00000000 c0b8efd0 c0c942c0
bf60: 0000406a 410fc0d1 00000000 ed93bf9c ed93bfa0 ed93bf90 c0108424 c0108414
bf80: 60000013 ffffffff
[<c010cdcc>] (__irq_svc) from [<c0108414>] (arch_cpu_idle+0x2c/0x48)
[<c0108414>] (arch_cpu_idle) from [<c0166550>] (default_idle_call+0x38/0x3c)
[<c07925d8>] (default_idle_call) from [<c01661e0>] (do_idle+0x108/0x1e4)
[<c01661e0>] (do_idle) from [<c016650] (cpu_startup_entry+0x28/0x2c)
[<c0166550>] (cpu_startup_entry) from [<c010ea34>] (secondary_start_kernel+0x114/0x134)
[<c010ea34>] (secondary_start_kernel) from [<001018cc>] (0x1018cc)
BUG: spinlock bad magic on CPU#2, khungtaskd/33
lock: 0xeda23a98, .magic: 00000000, .owner: <none>/-1, .owner_cpu: 0
CPU: 2 PID: 33 Comm: khungtaskd Not tainted 4.10-rc2-EXPERIMENTAL+ #17
Hardware name: Rockchip (Device Tree)
[<c0110938>] (unwind_backtrace) from [<c010c1e8>] (show_stack+0x20/0x24)
[<c010c1e8>] (show_stack) from [<c03cdd3c>] (dump_stack+0x84/0xa0)
[<c03cdd3c>] (dump_stack) from [<c0168f74>] (spin_dump+0x8c/0xa0)
[<c0168f74>] (spin_dump) from [<c0168fbc>] (spin_bug+0x34/0x38)
[<c0168fbc>] (spin_bug) from [<c0169060>] (do_raw_spin_lock+0x30/0x1ac)
[<c0169060>] (do_raw_spin_lock) from [<c0792600>] (_raw_spin_lock_irqsave+0x20/0x298)
[<c0792600>] (_raw_spin_lock_irqsave) from [<c036fce0>] (buffer_size_add+0x34/0x74)
[<c036fce0>] (buffer_size_add) from [<c0370234>] (persistent_ram_write+0x34/0xc0)
[<c0370234>] (persistent_ram_write) from [<c036eb00>] (ramoops_pstore_write_buf+0x1ac/0x228)
[<c036eb00>] (ramoops_pstore_write_buf) from [<c036dc4c>] (pstore_write_compat+0x48/0x55)
[<c036dc4c>] (pstore_write_compat) from [<c036e2ec>] (pstore_dump+0x234/0x29c)
[<c036e2ec>] (pstore_dump) from [<c01700ec>] (kmsg_dump+0xb4/0xcc)
[<c01700ec>] (kmsg_dump) from [<c01ec8cc>] (panic+0x114/0x26c)
[<c01ec8cc>] (panic) from [<c91afe5c>] (watchdog+0x36c/0x3ac)
[<c01afe5c>] (watchdog) from [<c0140014>] (kthread+0x134/0x14c)
[<c0140014>] (kthread) from [<c0107998>] (ret_from_fork+0x14/0x3c)
---[ end Kernel panic - not syncing: hung_task: blocked tasks
Hopefully this is helpful.
--
Best Regards
Shawn Lin
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