* kernel oopses on 7780 target with 2.6.25 kernel
@ 2009-08-11 13:00 Nylund, Martin
2009-08-11 13:24 ` AW: " Nylund, Martin
` (4 more replies)
0 siblings, 5 replies; 6+ messages in thread
From: Nylund, Martin @ 2009-08-11 13:00 UTC (permalink / raw)
To: linux-sh
Hello All,
I have a SH7780 target with kernel 2.6.25. I get some strange memory
management related kernel OOPSes when running a simple kernel module
which just acknowledges a interrupt source. Here's my module:
-------------------------------------------------
#include <linux/module.h>
#include <linux/init.h>
#include <linux/fs.h>
#include <linux/ioport.h>
#include <linux/interrupt.h>
#include <asm/io.h>
#include <asm/dma.h>
#include <asm/irq.h>
#include <asm/signal.h>
#include <asm/hico7780.h>
MODULE_LICENSE("GPL");
static irqreturn_t interrupt_handler(int irq, void *dev_id)
{
ctrl_outl(ctrl_inl(0xFFD00024)&~(1<<29), 0xFFD00024);
return IRQ_HANDLED;
}
static int __init init_mod(void)
{
set_irq_type(CAN0_IRQ,IRQ_TYPE_EDGE_FALLING);
if(request_irq(CAN0_IRQ, interrupt_handler, 0, "SDR", NULL)!=0)
{
printk(KERN_WARNING "%s request_irq failed\n",__func__);
return -EIO;
}
return 0;
}
static void __exit end_mod(void){
free_irq(CAN0_IRQ, NULL);
}
module_init(init_mod);
module_exit(end_mod);
-------------------------------------------------
I insert the module and start some user space action with following
script:
-------------------------------------------------
#!/bin/sh
modprobe sdr
top -d 1 | grep CPU &
while true; do
uptime
sleep 1
done
-------------------------------------------------
...after a while I get following oops messages
------------------------------------------------------
.
.
.
PID PPID USER STAT VSZ %MEM %CPU COMMAND
261 256 root S 2576 2% 0% grep CPU
16:15:49 up 2 min, load average: 0.08, 0.02, 0.00
CPU: 0% usr 1% sys 0% nice 95% idle 0% io 1% irq 0% softirq
PID PPID USER STAT VSZ %MEM %CPU COMMAND
261 256 root S 2576 2% 0% grep CPU
16:15:50 up 2 min, load average: 0.08, 0.02, 0.00
CPU: 0% usr 1% sys 0% nice 93% idle 0% io 2% irq 0% softirq
PID PPID USER STAT VSZ %MEM %CPU COMMAND
261 256 root S 2576 2% 0% grep CPU
Unable to handle kernel paging request at virtual address dffef000
pc = 881063c0
*pde = 88350000
Oops: 0000 [#1]
Modules linked in: sdr
Pid : 474, Comm: uptime
PC is at copy_page+0x10/0x4c
PC : 881063c0 SP : 8fd9be48 SR : 40008001 TEA : dffef000 Not
tainted
R0 : 00001000 R1 : 881063b0 R2 : 40008001 R3 : dffef054
R4 : 8f38e000 R5 : dffef000 R6 : 00000000 R7 : ff000000
R8 : dfff0000 R9 : 8f38e000 R10 : 8f38e000 R11 : dffef000
R12 : 88351000 R13 : 2960e094 R14 : 8fd9be54
MACH: 0000002c MACL: 00000000 GBR : 2975c450 PR : 880109d0
Call trace:
[<8805472a>] __do_fault+0x26a/0x4c0
[<88058056>] unmap_region+0xb6/0x100
[<8805603e>] handle_mm_fault+0x9e/0x360
[<8800fdca>] do_page_fault+0x8a/0x3e0
[<88059eae>] do_mmap_pgoff+0x20e/0x320
[<88247fec>] __down_write+0xc/0x20
[<880326aa>] up_write+0xa/0x20
[<880063d2>] old_mmap+0x72/0xe0
[<880080e0>] ret_from_exception+0x0/0xc
[<880080e0>] ret_from_exception+0x0/0xc
Process: uptime (pid: 474, stack limit = 8fd9a001)
Stack: (0x8fd9be48 to 0x8fd9c000)
be40: dffef000 0848c000 00000000 8805472a 8fd9be74
2960e094
be60: 8fd9be8c 00000001 8fdd080c 884381c0 00000001 8fdd084c 8fdd6294
8fdcda60
be80: 88058056 8fd9bea0 2960d000 00000001 0000007a 2960e000 8835a180
00000200
bea0: 8805603e 8fd9becc 2960e094 8fdd6294 00000838 8fdd080c 8fdcda60
000003ff
bec0: 0000007a 00000001 00000000 8fdd080c 00000001 8fd9beec 8800fdca
8fd9bef8
bee0: 8fd9bfa0 8fdcda94 8fc56820 2960e094 8fdcda60 8fdd080c 8fd9befc
00000001
bf00: 8fdd084c 00000012 8fdb8520 00000000 8f808150 8fd6077c 8fd60784
8fdd0860
bf20: 88059eae 8fd9bf4c 8fdb8520 00000002 00002000 00002000 00000003
00000073
bf40: 08100073 00000079 00000001 88247fec 8fdcdaa0 880326aa 8fd9bf74
00002000
bf60: 2960d000 8fdb8520 00000012 2960d000 00000079 880063d2 8fd9bf7c
00000003
bf80: 880080e0 7babf450 29574000 29583004 2960e094 880080e0 2960e094
00000001
bfa0: 0000000c 00010d26 00000003 0000005a 2960e094 00000000 00000008
2960e094
bfc0: 2960e09c 7babf3a4 2960e09c 2960e094 29583004 29574000 7babf450
7babf38c
bfe0: 2956de68 2955d0fa 00008000 2975c450 0000002c 00000030 ffffffff
00000060
---[ end trace ccfba5b32180435e ]---
note: uptime[474] exited with preempt_count 2
Segmentation fault
---------------------------------------------------------
If I compile above module statically to the kernel the system runs
stable.
Do you have any idea what might cause this or how/where I could start to
debug this? Any help is appreciated.
Regards,
Martin
^ permalink raw reply [flat|nested] 6+ messages in thread
* AW: kernel oopses on 7780 target with 2.6.25 kernel
2009-08-11 13:00 kernel oopses on 7780 target with 2.6.25 kernel Nylund, Martin
@ 2009-08-11 13:24 ` Nylund, Martin
2009-08-11 15:33 ` SUGIOKA Toshinobu
` (3 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: Nylund, Martin @ 2009-08-11 13:24 UTC (permalink / raw)
To: linux-sh
Here is better copy of my test session (PC seems to be always pointing
to copy_page or memcpy):
BusyBox v1.12.4 (2009-08-11 14:02:42 CEST) built-in shell (ash)
Enter 'help' for a list of built-in commands.
~ #
~ #
~ # cat mtest.sh
#!/bin/sh
modprobe sdr
top -d 1 | grep 'CPU:' &
while true; do
grep -i sdr /proc/interrupts
uptime
sleep 1
done
~ # ./mtest.sh
Modulo start
6: 282 sh7780-irq-level SDR
16:47:44 up 0 min, load average: 0.07, 0.01, 0.00
CPU: 30% usr 50% sys 0% nice 0% idle 0% io 20% irq 0% softirq
258 253 root S 2572 2% 0% grep CPU:
CPU: 33% usr 66% sys 0% nice 0% idle 0% io 0% irq 0% softirq
258 253 root S 2576 2% 0% grep CPU:
6: 3603 sh7780-irq-level SDR
16:47:46 up 0 min, load average: 0.06, 0.01, 0.00
CPU: 2% usr 7% sys 0% nice 82% idle 0% io 5% irq 0% softirq
258 253 root S 2576 2% 0% grep CPU:
CPU: 0% usr 0% sys 0% nice 97% idle 0% io 0% irq 0% softirq
258 253 root S 2576 2% 0% grep CPU:
6: 6847 sh7780-irq-level SDR
16:47:47 up 0 min, load average: 0.06, 0.01, 0.00
CPU: 0% usr 2% sys 0% nice 94% idle 0% io 1% irq 0% softirq
258 253 root S 2576 2% 0% grep CPU:
6: 10021 sh7780-irq-level SDR
16:47:48 up 0 min, load average: 0.06, 0.01, 0.00
CPU: 0% usr 4% sys 0% nice 90% idle 0% io 2% irq 0% softirq
258 253 root S 2576 2% 0% grep CPU:
6: 13199 sh7780-irq-level SDR
16:47:49 up 0 min, load average: 0.06, 0.01, 0.00
CPU: 1% usr 2% sys 0% nice 94% idle 0% io 0% irq 0% softirq
258 253 root S 2576 2% 2% grep CPU:
6: 16376 sh7780-irq-level SDR
Unable to handle kernel paging request at virtual address dfff0b00
pc = 881063c0
*pde = 88350000
Oops: 0000 [#1]
Modules linked in: sdr
Pid : 282, Comm: mtest.sh
PC is at copy_page+0x10/0x4c
PC : 881063c0 SP : 8fdf5e70 SR : 40008000 TEA : dfff0b00 Not
tainted
R0 : 8f3b3ae0 R1 : 7b80bd54 R2 : 0000020a R3 : 00000002
R4 : 848abcd0 R5 : 848abacc R6 : ff4bb4c4 R7 : 2975c450
R8 : dfff1000 R9 : 8f3b3000 R10 : 8f3b3b00 R11 : dfff0b00
R12 : 88351000 R13 : 7b80b5f4 R14 : 8fdf5e7c
MACH: 00000051 MACL: 00000000 GBR : 2975c450 PR : 880109d0
Call trace:
[<88054b38>] do_wp_page+0xb8/0x580
[<88056230>] handle_mm_fault+0x290/0x360
[<8800fdca>] do_page_fault+0x8a/0x3e0
[<880080e0>] ret_from_exception+0x0/0xc
[<880080e0>] ret_from_exception+0x0/0xc
[<88013e2a>] schedule_tail+0x4a/0x80
[<88013e2a>] schedule_tail+0x4a/0x80
[<8800fce8>] __do_page_fault+0xc8/0x120
[<880080e0>] ret_from_exception+0x0/0xc
[<880080e0>] ret_from_exception+0x0/0xc
Process: mtest.sh (pid: 282, stack limit = 8fdf4001)
Stack: (0x8fdf5e70 to 0x8fdf6000)
5e60: dfff0000 0f30a000 00000000
88054b38
5e80: 8fdf5e9c 7b80b5f4 00000000 88438660 8fdd66bc 88437140 00000001
8fdc7200
5ea0: 88056230 8fdf5ecc 7b80b5f4 8fde17b8 0000002c 8fdd66bc 8fdc7200
000003ff
5ec0: 8fde17b8 8fdc7240 0f30a15c 00000000 00000001 8fdf5eec 8800fdca
8fdf5ef8
5ee0: 8fdf5fa0 8fdc7234 8fc30080 7b80b5f4 8fdc7200 8fdd66bc 8fca7908
00000001
5f00: 8fdf5f0c 00000000 8fdf5f2c 8fc300fc 880080e0 8fdf5f90 8fca795c
ffffff0f
5f20: 8fca78e0 880080e0 2975c048 00000001 0000011a 882f828c 00000000
000000fc
5f40: 8fc15ce0 882f828c 8fc3028c 2975c04c 2975c048 00000000 8fc3027c
8fca78e0
5f60: ffffff0f 8fca795c 8fdf5f90 8fdf5f90 88013e2a 88013e2a 8800fce8
8fdf5f8c
5f80: 880080e0 7b80b604 00000000 297587b8 000000fd 880080e0 7b80b5f4
00000001
5fa0: 00002740 fffff000 00000000 0000011a 01200011 fffd2b3c 00000000
2975c048
5fc0: 2975c040 7b80b5f8 00000000 000000fd 297587b8 00000000 7b80b604
7b80b5f8
5fe0: 2967dba0 296ab064 00008001 2975c450 00000051 ad6b6374 ffffffff
00000060
---[ end trace 006900a3068ee60e ]---
note: mtest.sh[282] exited with preempt_count 2
BUG: scheduling while atomic: mtest.sh/282/0x10000002
Stack: (0x8fdf5c84 to 0x8fdf6000)
5c80: 88006a0e 8fdf5c94 88246260 00000000 88013d06 8fdf5c9c
8824656e
5ca0: 8fdf5ca8 8fc301d8 88013d60 880581b0 88013d60 8fdf5cd0 00000000
8fca4540
5cc0: 8fca4548 00000000 88246260 10000000 8824687a 8fdf5ce0 00000000
00000407
5ce0: 88019d02 8fdf5ce8 ffffff0f 88019d5a 8fdf5d0c 8fdf5e10 881105e0
882af930
5d00: 0000000b 8fc30080 8fc302fc 8801b2ee 8fdf5d14 8fdf5e10 881105e0
8fc300fc
5d20: 00000001 8fdf5e10 88018540 88006bec 8fdf5d4c 8fdf5e10 881105e0
882af930
5d40: 00000000 8fdf5e10 88018540 8800ffa4 8fdf5d68 88351000 8fc30080
dfff0b00
5d60: 88018540 88350000 c0071080 00000000 40008001 00000000 00000006
00000000
5d80: 20000000 00000000 8fcb1bc0 00000000 00000000 00000006 88351000
7b80b5f4
5da0: 8fdf5dd0 8fdf5dc8 c0071084 88040e50 40008001 2975c450 00000001
00000006
5dc0: ffffffff 00000040 88042c20 8fdf5de8 8fdf5dd4 8800d34c 8fdf5ddc
88042c3a
5de0: 8fdf5de8 882f8900 880037ca 8fdf5df8 880080e0 8fdf5e7c 7b80b5f4
88351000
5e00: dfff0b00 880080e0 dfff0b00 00000000 8f3b3ae0 7b80bd54 0000020a
00000002
5e20: 848abcd0 848abacc ff4bb4c4 2975c450 dfff1000 8f3b3000 8f3b3b00
dfff0b00
5e40: 88351000 7b80b5f4 8fdf5e7c 8fdf5e70 881063c0 880109d0 40008000
2975c450
5e60: 00000051 00000000 ffffffff 00000040 dfff0000 0f30a000 00000000
88054b38
5e80: 8fdf5e9c 7b80b5f4 00000000 88438660 8fdd66bc 88437140 00000001
8fdc7200
5ea0: 88056230 8fdf5ecc 7b80b5f4 8fde17b8 0000002c 8fdd66bc 8fdc7200
000003ff
5ec0: 8fde17b8 8fdc7240 0f30a15c 00000000 00000001 8fdf5eec 8800fdca
8fdf5ef8
5ee0: 8fdf5fa0 8fdc7234 8fc30080 7b80b5f4 8fdc7200 8fdd66bc 8fca7908
00000001
5f00: 8fdf5f0c 00000000 8fdf5f2c 8fc300fc 880080e0 8fdf5f90 8fca795c
ffffff0f
5f20: 8fca78e0 880080e0 2975c048 00000001 0000011a 882f828c 00000000
000000fc
5f40: 8fc15ce0 882f828c 8fc3028c 2975c04c 2975c048 00000000 8fc3027c
8fca78e0
5f60: ffffff0f 8fca795c 8fdf5f90 8fdf5f90 88013e2a 88013e2a 8800fce8
8fdf5f8c
5f80: 880080e0 7b80b604 00000000 297587b8 000000fd 880080e0 7b80b5f4
00000001
5fa0: 00002740 fffff000 00000000 0000011a 01200011 fffd2b3c 00000000
2975c048
5fc0: 2975c040 7b80b5f8 00000000 000000fd 297587b8 00000000 7b80b604
7b80b5f8
5fe0: 2967dba0 296ab064 00008001 2975c450 00000051 ad6b6374 ffffffff
00000060
Call trace:
[<88006a0e>] dump_stack+0xe/0x20
[<88246260>] schedule+0x0/0x480
[<88013d06>] __schedule_bug+0x46/0x80
[<8824656e>] schedule+0x30e/0x480
[<88013d60>] __cond_resched+0x20/0x60
[<880581b0>] exit_mmap+0x90/0x120
[<88013d60>] __cond_resched+0x20/0x60
[<88246260>] schedule+0x0/0x480
[<8824687a>] _cond_resched+0x3a/0x60
[<88019d02>] put_files_struct+0xe2/0x120
[<88019d5a>] __exit_files+0x1a/0x40
[<881105e0>] bust_spinlocks+0x0/0x60
[<8801b2ee>] do_exit+0x10e/0x7e0
[<881105e0>] bust_spinlocks+0x0/0x60
[<88018540>] printk+0x0/0x40
[<88006bec>] die+0x10c/0x180
[<881105e0>] bust_spinlocks+0x0/0x60
[<88018540>] printk+0x0/0x40
[<8800ffa4>] do_page_fault+0x264/0x3e0
[<88018540>] printk+0x0/0x40
[<c0071080>] interrupt_handler+0x0/0x60 [sdr]
[<c0071084>] interrupt_handler+0x4/0x60 [sdr]
[<88040e50>] handle_IRQ_event+0x50/0xa0
[<88042c20>] handle_level_irq+0x60/0xe0
[<8800d34c>] intc_enable+0x4c/0x80
[<88042c3a>] handle_level_irq+0x7a/0xe0
[<880037ca>] do_IRQ+0x4a/0xe0
[<880080e0>] ret_from_exception+0x0/0xc
[<880080e0>] ret_from_exception+0x0/0xc
[<881063c0>] copy_page+0x10/0x4c
[<880109d0>] copy_user_highpage+0xb0/0x120
[<88054b38>] do_wp_page+0xb8/0x580
[<88056230>] handle_mm_fault+0x290/0x360
[<8800fdca>] do_page_fault+0x8a/0x3e0
[<880080e0>] ret_from_exception+0x0/0xc
[<880080e0>] ret_from_exception+0x0/0xc
[<88013e2a>] schedule_tail+0x4a/0x80
[<88013e2a>] schedule_tail+0x4a/0x80
[<8800fce8>] __do_page_fault+0xc8/0x120
[<880080e0>] ret_from_exception+0x0/0xc
[<880080e0>] ret_from_exception+0x0/0xc
Segmentation fault
CPU: 2% usr 3% sys 0% nice 50% idle 0% io 44% irq 0% softirq
258 253 root S 2576 2% 0% grep CPU:
6: 19878 sh7780-irq-level SDR
16:47:51 up 0 min, load average: 0.06, 0.01, 0.00
CPU: 1% usr 2% sys 0% nice 93% idle 0% io 1% irq 0% softirq
258 253 root S 2576 2% 0% grep CPU:
6: 23058 sh7780-irq-level SDR
16:47:52 up 0 min, load average: 0.06, 0.01, 0.00
CPU: 0% usr 2% sys 0% nice 93% idle 0% io 2% irq 0% softirq
258 253 root S 2576 2% 0% grep CPU:
6: 26235 sh7780-irq-level SDR
16:47:53 up 0 min, load average: 0.06, 0.01, 0.00
CPU: 1% usr 2% sys 0% nice 94% idle 0% io 0% irq 0% softirq
258 253 root S 2576 2% 0% grep CPU:
6: 29417 sh7780-irq-level SDR
16:47:55 up 0 min, load average: 0.06, 0.01, 0.00
CPU: 0% usr 4% sys 0% nice 93% idle 0% io 0% irq 0% softirq
258 253 root S 2576 2% 0% grep CPU:
6: 32595 sh7780-irq-level SDR
16:47:56 up 0 min, load average: 0.06, 0.01, 0.00
CPU: 0% usr 2% sys 0% nice 94% idle 0% io 1% irq 0% softirq
258 253 root S 2576 2% 0% grep CPU:
6: 35778 sh7780-irq-level SDR
16:47:57 up 0 min, load average: 0.05, 0.01, 0.00
CPU: 0% usr 4% sys 0% nice 92% idle 0% io 1% irq 0% softirq
258 253 root S 2576 2% 0% grep CPU:
6: 38951 sh7780-irq-level SDR
16:47:58 up 0 min, load average: 0.05, 0.01, 0.00
CPU: 1% usr 1% sys 0% nice 94% idle 0% io 1% irq 0% softirq
258 253 root S 2576 2% 0% grep CPU:
6: 42131 sh7780-irq-level SDR
16:47:59 up 0 min, load average: 0.05, 0.01, 0.00
CPU: 1% usr 1% sys 0% nice 95% idle 0% io 0% irq 0% softirq
258 253 root S 2576 2% 0% grep CPU:
6: 45299 sh7780-irq-level SDR
16:48:00 up 0 min, load average: 0.05, 0.01, 0.00
CPU: 1% usr 3% sys 0% nice 91% idle 0% io 2% irq 0% softirq
258 253 root S 2576 2% 0% grep CPU:
6: 48476 sh7780-irq-level SDR
CPU: 1% usr 0% sys 0% nice 95% idle 0% io 1% irq 0% softirq
258 253 root S 2576 2% 0% grep CPU:
16:48:01 up 0 min, load average: 0.05, 0.01, 0.00
CPU: 0% usr 2% sys 0% nice 96% idle 0% io 0% irq 0% softirq
258 253 root S 2576 2% 0% grep CPU:
6: 51691 sh7780-irq-level SDR
16:48:02 up 0 min, load average: 0.05, 0.01, 0.00
CPU: 1% usr 2% sys 0% nice 92% idle 0% io 2% irq 0% softirq
258 253 root S 2576 2% 2% grep CPU:
6: 54869 sh7780-irq-level SDR
16:48:03 up 0 min, load average: 0.05, 0.01, 0.00
CPU: 1% usr 2% sys 0% nice 93% idle 0% io 1% irq 0% softirq
258 253 root S 2576 2% 0% grep CPU:
6: 58048 sh7780-irq-level SDR
16:48:04 up 0 min, load average: 0.05, 0.01, 0.00
CPU: 1% usr 2% sys 0% nice 93% idle 0% io 1% irq 0% softirq
258 253 root S 2576 2% 0% grep CPU:
6: 61233 sh7780-irq-level SDR
16:48:05 up 0 min, load average: 0.05, 0.01, 0.00
CPU: 1% usr 3% sys 0% nice 93% idle 0% io 0% irq 0% softirq
258 253 root S 2576 2% 0% grep CPU:
6: 64409 sh7780-irq-level SDR
16:48:06 up 0 min, load average: 0.04, 0.01, 0.00
CPU: 1% usr 2% sys 0% nice 93% idle 0% io 1% irq 0% softirq
258 253 root S 2576 2% 0% grep CPU:
6: 67590 sh7780-irq-level SDR
16:48:07 up 0 min, load average: 0.04, 0.01, 0.00
CPU: 0% usr 3% sys 0% nice 94% idle 0% io 0% irq 0% softirq
258 253 root S 2576 2% 0% grep CPU:
6: 70767 sh7780-irq-level SDR
16:48:08 up 0 min, load average: 0.04, 0.01, 0.00
CPU: 0% usr 2% sys 0% nice 93% idle 0% io 2% irq 0% softirq
258 253 root S 2576 2% 0% grep CPU:
6: 73947 sh7780-irq-level SDR
16:48:09 up 0 min, load average: 0.04, 0.01, 0.00
CPU: 1% usr 3% sys 0% nice 94% idle 0% io 0% irq 0% softirq
258 253 root S 2576 2% 0% grep CPU:
6: 77124 sh7780-irq-level SDR
16:48:10 up 0 min, load average: 0.04, 0.01, 0.00
CPU: 1% usr 2% sys 0% nice 93% idle 0% io 1% irq 0% softirq
258 253 root S 2576 2% 0% grep CPU:
6: 80302 sh7780-irq-level SDR
16:48:11 up 0 min, load average: 0.04, 0.01, 0.00
CPU: 1% usr 1% sys 0% nice 94% idle 0% io 1% irq 0% softirq
258 253 root S 2576 2% 0% grep CPU:
6: 83480 sh7780-irq-level SDR
16:48:12 up 0 min, load average: 0.04, 0.01, 0.00
CPU: 1% usr 3% sys 0% nice 92% idle 0% io 1% irq 0% softirq
258 253 root S 2576 2% 0% grep CPU:
6: 86662 sh7780-irq-level SDR
16:48:13 up 0 min, load average: 0.04, 0.01, 0.00
CPU: 0% usr 2% sys 0% nice 93% idle 0% io 1% irq 0% softirq
258 253 root S 2576 2% 0% grep CPU:
6: 89839 sh7780-irq-level SDR
16:48:15 up 0 min, load average: 0.04, 0.01, 0.00
CPU: 0% usr 3% sys 0% nice 93% idle 0% io 1% irq 0% softirq
258 253 root S 2576 2% 0% grep CPU:
6: 93016 sh7780-irq-level SDR
16:48:16 up 0 min, load average: 0.03, 0.01, 0.00
CPU: 1% usr 2% sys 0% nice 94% idle 0% io 0% irq 0% softirq
258 253 root S 2576 2% 2% grep CPU:
6: 96198 sh7780-irq-level SDR
16:48:17 up 0 min, load average: 0.03, 0.01, 0.00
CPU: 1% usr 3% sys 0% nice 93% idle 0% io 0% irq 0% softirq
258 253 root S 2576 2% 0% grep CPU:
6: 99375 sh7780-irq-level SDR
16:48:18 up 0 min, load average: 0.03, 0.01, 0.00
CPU: 1% usr 2% sys 0% nice 93% idle 0% io 0% irq 0% softirq
258 253 root S 2576 2% 0% grep CPU:
6: 102555 sh7780-irq-level SDR
16:48:19 up 0 min, load average: 0.03, 0.01, 0.00
CPU: 0% usr 3% sys 0% nice 93% idle 0% io 1% irq 0% softirq
258 253 root S 2576 2% 0% grep CPU:
6: 105733 sh7780-irq-level SDR
16:48:20 up 0 min, load average: 0.03, 0.01, 0.00
CPU: 1% usr 2% sys 0% nice 93% idle 0% io 1% irq 0% softirq
258 253 root S 2576 2% 0% grep CPU:
6: 108916 sh7780-irq-level SDR
16:48:21 up 0 min, load average: 0.03, 0.01, 0.00
CPU: 0% usr 3% sys 0% nice 94% idle 0% io 0% irq 0% softirq
258 253 root S 2576 2% 0% grep CPU:
6: 112092 sh7780-irq-level SDR
16:48:22 up 0 min, load average: 0.03, 0.01, 0.00
CPU: 1% usr 2% sys 0% nice 94% idle 0% io 0% irq 0% softirq
258 253 root S 2576 2% 0% grep CPU:
6: 115272 sh7780-irq-level SDR
16:48:23 up 0 min, load average: 0.03, 0.01, 0.00
CPU: 0% usr 3% sys 0% nice 94% idle 0% io 0% irq 0% softirq
258 253 root S 2576 2% 0% grep CPU:
6: 118451 sh7780-irq-level SDR
16:48:24 up 0 min, load average: 0.03, 0.01, 0.00
Unable to handle kernel paging request at virtual address dfff0e6a
pc = 88106854
*pde = 88350000
Oops: 0000 [#2]
Modules linked in: sdr
Pid : 257, Comm: top
PC is at memcpy+0x20/0x28c
PC : 88106854 SP : 8fdcfeac SR : 40008100 TEA : dfff0e6a Tainted:
G D
R0 : 8f88c00e R1 : 00000010 R2 : 40008101 R3 : 50764e5c
R4 : 8f88c000 R5 : 50764e5c R6 : 00000007 R7 : ff000000
R8 : 086a7000 R9 : 00000000 R10 : dfff0000 R11 : 88351000
R12 : 7b93fe5d R13 : 8f88c000 R14 : 8fdcfeac
MACH: 00000001 MACL: 00000000 GBR : 2975c450 PR : 88010c60
Call trace:
[<88056832>] access_process_vm+0x132/0x1c0
[<8809fa5c>] proc_pid_cmdline+0x7c/0x120
[<880a18c8>] proc_info_read+0xa8/0x100
[<880667c6>] vfs_read+0x86/0x160
[<88066dde>] sys_read+0x3e/0xa0
[<880081e8>] syscall_call+0xc/0x10
[<88066da0>] sys_read+0x0/0xa0
Process: top (pid: 257, stack limit = 8fdce001)
Stack: (0x8fdcfeac to 0x8fdd0000)
fea0: 88056832 8fdcfed4 8f88c000 7b93fe6b
8fdcfeb4
fec0: 00000e5d 0000000e 886a7000 886a7e5d 0000000e 00000000 8f88c000
8fd49040
fee0: 8fd333b4 8fd33380 0000000e 8835e4e0 8fd9da58 8809fa5c 8fdcff18
8f88c000
ff00: 00000000 8fd49040 0000000e 8fd333fc 8fd33380 00000000 8fdcff34
880a18c8
ff20: 8fdcff3c 8fdcff78 00000018 fffffff4 8fd49040 8f88c000 8f88966c
0045fe75
ff40: 880667c6 8fdcff60 0000000c fffffff7 8fdcff78 00000018 0045fe75
8fdc5f60
ff60: 88066dde 8fdcff78 00000018 0045fe75 8fdc5f60 8fdcff44 0000000e
00000000
ff80: 00000000 880081e8 00000052 004054c8 00000000 00000021 8fdcfff8
88066da0
ffa0: 00000000 00000450 0000000e 00000003 00000003 0045fe75 00000018
000005b0
ffc0: 00000018 0045fe75 00000003 00461d4c 004054c8 0000000c 00000052
7bfb4aa8
ffe0: 296d1954 004082aa 00000101 2975c450 00000001 9999999a 0000004c
00000160
---[ end trace 006900a3068ee60e ]---
note: top[257] exited with preempt_count 1
BUG: scheduling while atomic: top/257/0x10000001
Stack: (0x8fdcfcc0 to 0x8fdd0000)
fcc0: 88006a0e 8fdcfcd0 88246260 00000000 88013d06 8fdcfcd8 8824656e
8fdcfce4
fce0: 8fc56278 88013d60 88067620 88013d60 8fdcfd0c 00000004 8fca4240
8fca4248
fd00: 00000000 88246260 10000000 8824687a 8fdcfd1c 00000000 00000007
88019d02
fd20: 8fdcfd24 ffffff0f 88019d5a 8fdcfd48 8fdcfe4c 881105e0 882af930
0000000b
fd40: 8fc56120 8fc5639c 8801b2ee 8fdcfd50 8fdcfe4c 881105e0 8fc5619c
00000001
fd60: 8fdcfe4c 88018540 88006bec 8fdcfd88 8fdcfe4c 881105e0 882af930
00000000
fd80: 8fdcfe4c 88018540 8800ffa4 8fdcfda4 7b93fe5d 8fc56120 dfff0e6a
88018540
fda0: 88350000 c0071080 00000000 c0071080 00000000 40008101 00000000
00000006
fdc0: 00000000 20000000 00000000 8fcb1bc0 00000000 00000000 00000006
7b93fe5d
fde0: 8f88c000 8fdcfe0c 8fdcfe0c c0071080 88040e50 00000001 00000006
00000001
fe00: 00000150 88042c20 8fdcfe24 8fdcfe10 8800d34c 8fdcfe18 88042c3a
8fdcfe24
fe20: 882f8900 880037ca 8fdcfe34 880080e0 8fdcfeac 8f88c000 7b93fe5d
88351000
fe40: 880080e0 dfff0e6a 00000000 8f88c00e 00000010 40008101 50764e5c
8f88c000
fe60: 50764e5c 00000007 ff000000 086a7000 00000000 dfff0000 88351000
7b93fe5d
fe80: 8f88c000 8fdcfeac 8fdcfeac 88106854 88010c60 40008100 2975c450
00000001
fea0: 00000000 ffffffff 00000040 88056832 8fdcfed4 8f88c000 7b93fe6b
8fdcfeb4
fec0: 00000e5d 0000000e 886a7000 886a7e5d 0000000e 00000000 8f88c000
8fd49040
fee0: 8fd333b4 8fd33380 0000000e 8835e4e0 8fd9da58 8809fa5c 8fdcff18
8f88c000
ff00: 00000000 8fd49040 0000000e 8fd333fc 8fd33380 00000000 8fdcff34
880a18c8
ff20: 8fdcff3c 8fdcff78 00000018 fffffff4 8fd49040 8f88c000 8f88966c
0045fe75
ff40: 880667c6 8fdcff60 0000000c fffffff7 8fdcff78 00000018 0045fe75
8fdc5f60
ff60: 88066dde 8fdcff78 00000018 0045fe75 8fdc5f60 8fdcff44 0000000e
00000000
ff80: 00000000 880081e8 00000052 004054c8 00000000 00000021 8fdcfff8
88066da0
ffa0: 00000000 00000450 0000000e 00000003 00000003 0045fe75 00000018
000005b0
ffc0: 00000018 0045fe75 00000003 00461d4c 004054c8 0000000c 00000052
7bfb4aa8
ffe0: 296d1954 004082aa 00000101 2975c450 00000001 9999999a 0000004c
00000160
Call trace:
[<88006a0e>] dump_stack+0xe/0x20
[<88246260>] schedule+0x0/0x480
[<88013d06>] __schedule_bug+0x46/0x80
[<8824656e>] schedule+0x30e/0x480
[<88013d60>] __cond_resched+0x20/0x60
[<88067620>] fput+0x20/0x40
[<88013d60>] __cond_resched+0x20/0x60
[<88246260>] schedule+0x0/0x480
[<8824687a>] _cond_resched+0x3a/0x60
[<88019d02>] put_files_struct+0xe2/0x120
[<88019d5a>] __exit_files+0x1a/0x40
[<881105e0>] bust_spinlocks+0x0/0x60
[<8801b2ee>] do_exit+0x10e/0x7e0
[<881105e0>] bust_spinlocks+0x0/0x60
[<88018540>] printk+0x0/0x40
[<88006bec>] die+0x10c/0x180
[<881105e0>] bust_spinlocks+0x0/0x60
[<88018540>] printk+0x0/0x40
[<8800ffa4>] do_page_fault+0x264/0x3e0
[<88018540>] printk+0x0/0x40
[<c0071080>] interrupt_handler+0x0/0x60 [sdr]
[<c0071080>] interrupt_handler+0x0/0x60 [sdr]
[<c0071080>] interrupt_handler+0x0/0x60 [sdr]
[<88040e50>] handle_IRQ_event+0x50/0xa0
[<88042c20>] handle_level_irq+0x60/0xe0
[<8800d34c>] intc_enable+0x4c/0x80
[<88042c3a>] handle_level_irq+0x7a/0xe0
[<880037ca>] do_IRQ+0x4a/0xe0
[<880080e0>] ret_from_exception+0x0/0xc
[<880080e0>] ret_from_exception+0x0/0xc
[<88106854>] memcpy+0x20/0x28c
[<88010c60>] copy_from_user_page+0xa0/0x120
[<88056832>] access_process_vm+0x132/0x1c0
[<8809fa5c>] proc_pid_cmdline+0x7c/0x120
[<880a18c8>] proc_info_read+0xa8/0x100
[<880667c6>] vfs_read+0x86/0x160
[<88066dde>] sys_read+0x3e/0xa0
[<880081e8>] syscall_call+0xc/0x10
[<88066da0>] sys_read+0x0/0xa0
6: 120472 sh7780-irq-level SDR
16:48:25 up 0 min, load average: 0.03, 0.01, 0.00
6: 123653 sh7780-irq-level SDR
16:48:26 up 0 min, load average: 0.03, 0.01, 0.00
6: 126831 sh7780-irq-level SDR
16:48:27 up 0 min, load average: 0.03, 0.01, 0.00
6: 130010 sh7780-irq-level SDR
16:48:28 up 0 min, load average: 0.03, 0.01, 0.00
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: kernel oopses on 7780 target with 2.6.25 kernel
2009-08-11 13:00 kernel oopses on 7780 target with 2.6.25 kernel Nylund, Martin
2009-08-11 13:24 ` AW: " Nylund, Martin
@ 2009-08-11 15:33 ` SUGIOKA Toshinobu
2009-08-12 7:34 ` AW: " Nylund, Martin
` (2 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: SUGIOKA Toshinobu @ 2009-08-11 15:33 UTC (permalink / raw)
To: linux-sh
At 15:00 09/08/11 +0200, "Nylund, Martin" <Martin.Nylund@emtrion.de> wrote:
>I have a SH7780 target with kernel 2.6.25. I get some strange memory
>management related kernel OOPSes when running a simple kernel module
>which just acknowledges a interrupt source. Here's my module:
kmap_coherent in 2.6.25 has a bug.
Temporal TLB entry created in kmap_coherent is not registered to swapper_pg_dir.
So, if that entry is replaced, it can't be reloaded.
The scenario might be,
(1) TLB is loaded in kmap_coherent by "update_mmu_cache".
(2) Interrupt.
(3) Interrupt handler cause TLB miss.
(4) TLB entry which is loaded in step (1) is replaced.
(5) copy_from/to_user_page get TLB miss, but fault handler can't find entry
in the page directory.
in 2.6.30
set_pte(kmap_coherent_pte - (FIX_CMAP_END - idx), pte);
is called after update_mmu_cache.
So, you should better to update to the recent kernel.
Regards,
SUGIOKA Toshinobu.
^ permalink raw reply [flat|nested] 6+ messages in thread
* AW: kernel oopses on 7780 target with 2.6.25 kernel
2009-08-11 13:00 kernel oopses on 7780 target with 2.6.25 kernel Nylund, Martin
2009-08-11 13:24 ` AW: " Nylund, Martin
2009-08-11 15:33 ` SUGIOKA Toshinobu
@ 2009-08-12 7:34 ` Nylund, Martin
2009-08-12 8:39 ` Paul Mundt
2009-08-12 12:33 ` AW: " Nylund, Martin
4 siblings, 0 replies; 6+ messages in thread
From: Nylund, Martin @ 2009-08-12 7:34 UTC (permalink / raw)
To: linux-sh
> in 2.6.30
> set_pte(kmap_coherent_pte - (FIX_CMAP_END - idx), pte);
> is called after update_mmu_cache.
>
> So, you should better to update to the recent kernel.
I was afraid of something like that. Do you happen to remember when or
in which kernel release this bug was fixed? Is it a total no-go to try
to backport this to 2.6.25? Updating the whole kernel takes time which I
currently don't have.
regards,
Martin
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: kernel oopses on 7780 target with 2.6.25 kernel
2009-08-11 13:00 kernel oopses on 7780 target with 2.6.25 kernel Nylund, Martin
` (2 preceding siblings ...)
2009-08-12 7:34 ` AW: " Nylund, Martin
@ 2009-08-12 8:39 ` Paul Mundt
2009-08-12 12:33 ` AW: " Nylund, Martin
4 siblings, 0 replies; 6+ messages in thread
From: Paul Mundt @ 2009-08-12 8:39 UTC (permalink / raw)
To: linux-sh
On Wed, Aug 12, 2009 at 09:34:26AM +0200, Nylund, Martin wrote:
>
> > in 2.6.30
> > set_pte(kmap_coherent_pte - (FIX_CMAP_END - idx), pte);
> > is called after update_mmu_cache.
> >
> > So, you should better to update to the recent kernel.
>
> I was afraid of something like that. Do you happen to remember when or
> in which kernel release this bug was fixed? Is it a total no-go to try
> to backport this to 2.6.25? Updating the whole kernel takes time which I
> currently don't have.
>
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h¬ca4f4d9bd657e8bc7e1665ba5077465138f133
^ permalink raw reply [flat|nested] 6+ messages in thread
* AW: kernel oopses on 7780 target with 2.6.25 kernel
2009-08-11 13:00 kernel oopses on 7780 target with 2.6.25 kernel Nylund, Martin
` (3 preceding siblings ...)
2009-08-12 8:39 ` Paul Mundt
@ 2009-08-12 12:33 ` Nylund, Martin
4 siblings, 0 replies; 6+ messages in thread
From: Nylund, Martin @ 2009-08-12 12:33 UTC (permalink / raw)
To: linux-sh
> On Wed, Aug 12, 2009 at 09:34:26AM +0200, Nylund, Martin wrote:
> >
> > > in 2.6.30
> > > set_pte(kmap_coherent_pte - (FIX_CMAP_END - idx), pte);
> > > is called after update_mmu_cache.
> > >
> > > So, you should better to update to the recent kernel.
> >
> > I was afraid of something like that. Do you happen to
> remember when or
> > in which kernel release this bug was fixed? Is it a total
> no-go to try
> > to backport this to 2.6.25? Updating the whole kernel takes
> time which
> > I currently don't have.
> >
> http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.g
it;a=commitdiff;h¬ca4f4d9bd657e8bc7e1665ba5077465138f133
I applied the changes and now the test runs stable. Thanks!
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2009-08-12 12:33 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz follow: Atom feed
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2009-08-11 13:00 kernel oopses on 7780 target with 2.6.25 kernel Nylund, Martin
2009-08-11 13:24 ` AW: " Nylund, Martin
2009-08-11 15:33 ` SUGIOKA Toshinobu
2009-08-12 7:34 ` AW: " Nylund, Martin
2009-08-12 8:39 ` Paul Mundt
2009-08-12 12:33 ` AW: " Nylund, Martin
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