Re: bbb kexec bug: Unhandled fault external abort on non-linefetch (0x1028) at 0xfa1ac140
Hi, Grygorii
Thanks fot your reply.
On 12/28/15 at 02:15pm, Grygorii Strashko wrote:
> On 12/28/2015 09:18 AM, Dave Young wrote:
> > On 12/27/15 at 03:38pm, Dave Young wrote:
> >> Here is what I get when I test kdump on Beagle bone black:
> >>
> >> Added a printk line at the begin of function omap_gpio_rmw:
> >> printk("## %lx, %x, %x\n", base, reg, mask);
> >>
> >> Any hints how to fix it? I tried call the machine_kexec_mask_interrupts
> >> at runtime kernel also panics so it may not limit to kdump case.
> >>
> >> [ 66.340168] ## fa1ac000, 140, 1
> >> [ 66.344456] Unhandled fault: external abort on non-linefetch (0x1028)
> >> at 0xfa1ac140
> >> [ 66.352142] pgd = dd9f
>
> [...]
>
> >> [ 66.727278] [] (omap_set_gpio_triggering) from []
> >> (omap_gpio_mask_irq+0x29/0x34)
>
> Usually such back-trace means that you are trying to access HW
> which is disabled (powered off) already. Or this HW IP has never been enabled.
It is possible, but how to detect such disabled gpio in this for_each_irq_desc
loop? I tried below, it works for me but I'm not sure if it is a right fix.
---
arch/arm/kernel/machine_kexec.c |2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- linux.orig/arch/arm/kernel/machine_kexec.c
+++ linux/arch/arm/kernel/machine_kexec.c
@@ -106,7 +106,7 @@ static void machine_kexec_mask_interrupt
if (chip->irq_eoi && irqd_irq_inprogress(>irq_data))
chip->irq_eoi(>irq_data);
- if (chip->irq_mask)
+ if ((chip->irq_mask) && !irqd_irq_masked(>irq_data))
chip->irq_mask(>irq_data);
if (chip->irq_disable && !irqd_irq_disabled(>irq_data))
>
> >> [ 66.736457] [] (omap_gpio_mask_irq) from []
> >> (machine_crash_shutdown+0xb9/0x104)
> >> [ 66.745551] [] (machine_crash_shutdown) from []
> >> (crash_kexec+0x35/0x68)
> >> [ 66.753942] [] (crash_kexec) from []
> >> (die+0x1b9/0x390)
> >> [ 66.760859] [] (die) from []
> >> (__do_kernel_fault.part.0+0x4f/0x1cc)
> >> [ 66.768824] [] (__do_kernel_fault.part.0) from []
> >> (do_page_fault+0x155/0x29c)
> >> [ 66.40] [] (do_page_fault) from []
> >> (do_DataAbort+0x2f/0x88)
> >> [ 66.785432] [] (do_DataAbort) from []
> >> (__dabt_svc+0x3b/0x80)
> >> [ 66.792858] Exception stack(0xddc39e58 to 0xddc39ea0)
> >> [ 66.797929] 9e40:
> >> 0063 df93647c
> >> [ 66.806144] 9e60: 1f26a000 0001 0063 0007 c0702e3c
> >> ddc38000
> >> [ 66.814359] 9e80: 7f70d614 0030 ddc39ea8 c021e54b c021e54c
> >> 600e0033
> >> [ 66.822575] [] (__dabt_svc) from []
> >> (sysrq_handle_crash+0x18/0x1c)
> >> [ 66.830530] [] (sysrq_handle_crash) from []
> >> (__handle_sysrq+0x79/0x10c)
> >> [ 66.838919] [] (__handle_sysrq) from []
> >> (write_sysrq_trigger+0x45/0x50)
> >> [ 66.847310] [] (write_sysrq_trigger) from []
> >> (proc_reg_write+0x43/0x68)
> >> [ 66.855700] [] (proc_reg_write) from []
> >> (__vfs_write+0xf/0x8c)
> >> [ 66.863304] [] (__vfs_write) from []
> >> (vfs_write+0x5f/0x128)
> >> [ 66.870646] [] (vfs_write) from []
> >> (SyS_write+0x2b/0x68)
> >> [ 66.877729] [] (SyS_write) from []
> >> (ret_fast_syscall+0x1/0x4c)
> >> [ 66.885332] Code: 443c 4643 f6a9 f9a1 (6823) 0732
> >> [ 66.890145] ---[ end trace 5a39094ece4dc200 ]---
> >> [ 66.894782] Kernel panic - not syncing: Fatal exception
> >> [ 66.900033] ---[ end Kernel panic - not syncing: Fatal exception
> >>
>
>
> --
> regards,
> -grygorii
Thanks
Dave
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Re: bbb kexec bug: Unhandled fault external abort on non-linefetch (0x1028) at 0xfa1ac140
On 12/28/2015 09:18 AM, Dave Young wrote:
> On 12/27/15 at 03:38pm, Dave Young wrote:
>> Here is what I get when I test kdump on Beagle bone black:
>>
>> Added a printk line at the begin of function omap_gpio_rmw:
>> printk("## %lx, %x, %x\n", base, reg, mask);
>>
>> Any hints how to fix it? I tried call the machine_kexec_mask_interrupts
>> at runtime kernel also panics so it may not limit to kdump case.
>>
>> [ 66.340168] ## fa1ac000, 140, 1
>> [ 66.344456] Unhandled fault: external abort on non-linefetch (0x1028) at
>> 0xfa1ac140
>> [ 66.352142] pgd = dd9f
[...]
>> [ 66.727278] [] (omap_set_gpio_triggering) from []
>> (omap_gpio_mask_irq+0x29/0x34)
Usually such back-trace means that you are trying to access HW
which is disabled (powered off) already. Or this HW IP has never been enabled.
>> [ 66.736457] [] (omap_gpio_mask_irq) from []
>> (machine_crash_shutdown+0xb9/0x104)
>> [ 66.745551] [] (machine_crash_shutdown) from []
>> (crash_kexec+0x35/0x68)
>> [ 66.753942] [] (crash_kexec) from [] (die+0x1b9/0x390)
>> [ 66.760859] [] (die) from []
>> (__do_kernel_fault.part.0+0x4f/0x1cc)
>> [ 66.768824] [] (__do_kernel_fault.part.0) from []
>> (do_page_fault+0x155/0x29c)
>> [ 66.40] [] (do_page_fault) from []
>> (do_DataAbort+0x2f/0x88)
>> [ 66.785432] [] (do_DataAbort) from []
>> (__dabt_svc+0x3b/0x80)
>> [ 66.792858] Exception stack(0xddc39e58 to 0xddc39ea0)
>> [ 66.797929] 9e40:
>> 0063 df93647c
>> [ 66.806144] 9e60: 1f26a000 0001 0063 0007 c0702e3c
>> ddc38000
>> [ 66.814359] 9e80: 7f70d614 0030 ddc39ea8 c021e54b c021e54c
>> 600e0033
>> [ 66.822575] [] (__dabt_svc) from []
>> (sysrq_handle_crash+0x18/0x1c)
>> [ 66.830530] [] (sysrq_handle_crash) from []
>> (__handle_sysrq+0x79/0x10c)
>> [ 66.838919] [] (__handle_sysrq) from []
>> (write_sysrq_trigger+0x45/0x50)
>> [ 66.847310] [] (write_sysrq_trigger) from []
>> (proc_reg_write+0x43/0x68)
>> [ 66.855700] [] (proc_reg_write) from []
>> (__vfs_write+0xf/0x8c)
>> [ 66.863304] [] (__vfs_write) from []
>> (vfs_write+0x5f/0x128)
>> [ 66.870646] [] (vfs_write) from []
>> (SyS_write+0x2b/0x68)
>> [ 66.877729] [] (SyS_write) from []
>> (ret_fast_syscall+0x1/0x4c)
>> [ 66.885332] Code: 443c 4643 f6a9 f9a1 (6823) 0732
>> [ 66.890145] ---[ end trace 5a39094ece4dc200 ]---
>> [ 66.894782] Kernel panic - not syncing: Fatal exception
>> [ 66.900033] ---[ end Kernel panic - not syncing: Fatal exception
>>
--
regards,
-grygorii
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Re: bbb kexec bug: Unhandled fault external abort on non-linefetch (0x1028) at 0xfa1ac140
Ccing more people.
On 12/27/15 at 03:38pm, Dave Young wrote:
> Hi,
>
> Here is what I get when I test kdump on Beagle bone black:
>
> Added a printk line at the begin of function omap_gpio_rmw:
> printk("## %lx, %x, %x\n", base, reg, mask);
>
> Any hints how to fix it? I tried call the machine_kexec_mask_interrupts
> at runtime kernel also panics so it may not limit to kdump case.
>
> [ 66.340168] ## fa1ac000, 140, 1
> [ 66.344456] Unhandled fault: external abort on non-linefetch (0x1028) at
> 0xfa1ac140
> [ 66.352142] pgd = dd9f
> [ 66.354856] [fa1ac140] *pgd=48011452(bad)
> [ 66.358896] Internal error: : 1028 [#2] SMP THUMB2
> [ 66.363703] Modules linked in: ti_cpsw cpsw_ale cpsw_common
> omap_hwspinlock hwspinlock_core ir_lirc_codec lirc_dev ir_xmp_decoder is
> [ 66.391072] CPU: 0 PID: 402 Comm: bash Not tainted 4.4.0-rc6+ #80
> [ 66.397190] Hardware name: Generic AM33XX (Flattened Device Tree)
> [ 66.403307] task: df51d240 ti: ddc38000 task.ti: ddc38000
> [ 66.408731] PC is at omap_set_gpio_triggering+0x86/0x23c
> [ 66.414065] LR is at omap_set_gpio_triggering+0x87/0x23c
> [ 66.419398] pc : []lr : []psr: a00e01b3
> [ 66.419398] sp : ddc39c30 ip : 001f fp : c021e550
> [ 66.430923] r10: 0002 r9 : c021e554 r8 : 0001
> [ 66.436168] r7 : fa1ac000 r6 : r5 : df0d4a10 r4 : fa1ac140
> [ 66.442721] r3 : 0001 r2 : 0007 r1 : r0 : 0020
> [ 66.449276] Flags: NzCv IRQs off FIQs on Mode SVC_32 ISA Thumb
> Segment none
> [ 66.456701] Control: 50c5387d Table: 9d9f0019 DAC: 0051
> [ 66.462469] Process bash (pid: 402, stack limit = 0xddc38218)
> [ 66.468237] Stack: (0xddc39c30 to 0xddc3a000)
> [ 66.472612] 9c20: df0d4a10 df0d4a64
> a00e0193
> [ 66.480827] 9c40: 000b c021e554 0002 c01f2551 c01f2529 df0d7700
> 005a df0d7890
> [ 66.489041] 9c60: c06f3530 c0012f35 ddc39c78 c0768f04 ddc39c80 ddc39e58
> 200e0113 c00803fd
> [ 66.497256] 9c80: 0063 df93647c 1f26a000 0001 0063
> 0007 c0702e3c
> [ 66.505471] 9ca0: ddc38000 7f70d614 0030 ddc39ea8
> c021e54b c021e54c
> [ 66.513686] 9cc0: 600e0033 c0730644 c06d86f4 ddc39e58 c0010f51
> ddc38218 000b
> [ 66.521901] 9ce0: 600e0113 200e0113 0020 ddc38000 bf00 0004
> 3800 20653466
> [ 66.530116] 9d00: 61663566 37396620 33322064 28203030 63313037 64622029
> 00203031 df78b5c4
> [ 66.538331] 9d20: 0031 c005f8df c05f3de0 ddc39d4c 000a
> ddc39e58 0805
> [ 66.546546] 9d40: df78b580 df78b580 c076c724 df78b5c4 0031 c001bc23
> c0412e11
> [ 66.554761] 9d60: c06cd6dc c006021b c005f36e 0001
> 0800
> [ 66.562976] 9d80: c0755f44 c041250d c06d8a0c 0805
> ddc39e8c ddc39e58
> [ 66.571191] 9da0: c06d8a5c 7f70d614 c00091ff 0001
> 0e65 0406
> [ 66.579405] 9dc0: 0406 600e0013 c0412165 0406 c005f1c3
> 000f 0a2f88ba
> [ 66.587620] 9de0: 000f c0753f28 c07335f8 c0753308 600e0013 c06f3408
> 0001
> [ 66.595834] 9e00: df936478 0001 1f26a000 1f26a000 200e0013 c005f00b
> 0001 000f
> [ 66.604049] 9e20: 0001 c005f665 dfd4c668 c041215b 9b34a83f c00b49b9
> c021e54c
> [ 66.612265] 9e40: 600e0033 ddc39e8c ddc38000 c041247b
> 0063 df93647c
> [ 66.620480] 9e60: 1f26a000 0001 0063 0007 c0702e3c
> ddc38000
> [ 66.628696] 9e80: 7f70d614 0030 ddc39ea8 c021e54b c021e54c
> 600e0033
> [ 66.636910] 9ea0: 0051 c021e54b c06f349c c021e8b5 0055 0002
> 0051 0001
> [ 66.645125] 9ec0: df26d7c0 ddc38000 c021ec79 ddc39f88 c021ec35
> c010695f
> [ 66.653340] 9ee0: df241200 c010691d c0423f80 ddc39f88 0002 c00ca6a3
> c06d8a7c
> [ 66.661556] 9f00: be9ac93c c00091ff 0400 c0019001 b6f7a000 1000
> df78b580 0002
> [ 66.669770] 9f20: dec84c38 df241200 c00cab05 0073 c00b82f7
> 000b6f7a be9ac380
> [ 66.677985] 9f40: df241200 0002 b6f7a000 ddc39f88 0002
> 7f70d614 c00cacd7
> [ 66.686200] 9f60: be9ac93c df241200 df241200
> 0002
> [ 66.694415] 9f80: ddc38000 c00cb313 0002 b6f7a000
> b6ee2d60 0004
> [ 66.702630] 9fa0: c000df84 c000ddc1 0002 b6f7a000 0001 b6f7a000
> 0002
> [ 66.710845] 9fc0: 0002 b6f7a000 b6ee2d60 0004 0002
> 7f72cd94 7f70d614
> [ 66.719060] 9fe0: be9ac8fc b6dfcae4 b6e60690 600e0010 0001
>
> [ 66.727278] [] (omap_set_gpio_triggering) from []
> (omap_gpio_mask_irq+0x29/0x34)
> [ 66.736457] [] (omap_gpio_mask_irq) from []
> (machine_crash_shutdown+0xb9/0x104)
> [ 66.745551] []
