[asterisk-dev] zttranscode - bad page state

[Michael L. Young]

Hi everyone,

I have been waiting to see if anyone else has come across this yet or not.
It seems that the last few changes made to zttranscode in trunk is causing a
bad page state and the kernel then produces a bt.  I have tried clean check
outs and updated to the latest kernel 2.6.17-1.2142_FC4.

I receive this message in my logs and also at the console when I have
verbose on.

I only load ztdummy and then I start asterisk.  After getting the message
about a bad page state, I stop asterisk and try to unload ztdummy and then
zaptel.  It tells me that zttranscode is running so I unload that as well
and then zaptel.  If I start asterisk without the zaptel drivers loaded,
there is no message produced.  Also, if I compile the zaptel drivers without
zttranscode, everything runs fine.  So, I think I have narrowed it down to
zttranscode. (Also, reboots do not solve this.)

Here is the bt from my logs:
Jul 26 22:58:23 ns1 kernel: Zapata Telephony Interface Registered on major
196
Jul 26 22:58:23 ns1 kernel: Zaptel Version: SVN-trunk-r1247 Echo Canceller:
MG2
Jul 26 22:58:23 ns1 kernel: ztdummy: RTC rate is 1024
Jul 26 22:58:23 ns1 kernel: Registered tone zone 0 (United States / North
America)
Jul 26 22:58:29 ns1 kernel: Zaptel Transcoder support loaded
Jul 26 22:58:29 ns1 kernel: Registered tone zone 0 (United States / North
America)
Jul 26 22:58:37 ns1 kernel: Bad page state in process 'events/0'
Jul 26 22:58:37 ns1 kernel: page:c1007500 flags:0x00000400 mapping:00000000
mapcount:0 count:0 (Not tainted)
Jul 26 22:58:37 ns1 kernel: Trying to fix it up, but a reboot is needed
Jul 26 22:58:37 ns1 kernel: Backtrace:
Jul 26 22:58:37 ns1 kernel:  <c044069f> bad_page+0x4a/0x71  <c0440a44>
__free_pages_ok+0x87/0x12a
Jul 26 22:58:37 ns1 kernel:  <c04cfacd> memmove+0xe/0x22  <c0454510>
kmem_freepages+0x6e/0x88
Jul 26 22:58:37 ns1 kernel:  <c045464a> slab_destroy+0x53/0x6c  <c04549e2>
cache_reap+0x14e/0x19f
Jul 26 22:58:37 ns1 kernel:  <c0427729> run_workqueue+0x76/0xb3  <c0454894>
cache_reap+0x0/0x19f
Jul 26 22:58:37 ns1 kernel:  <c04277f3> worker_thread+0x0/0x10b  <c04278ce>
worker_thread+0xdb/0x10b
Jul 26 22:58:37 ns1 kernel:  <c04177bc> default_wake_function+0x0/0xc
<c042a0b4> kthread+0x90/0xbc
Jul 26 22:58:37 ns1 kernel:  <c042a024> kthread+0x0/0xbc  <c0401005>
kernel_thread_helper+0x5/0xb
Jul 26 22:58:37 ns1 kernel: Bad page state in process 'events/0'
Jul 26 22:58:37 ns1 kernel: page:c1007520 flags:0x00000400 mapping:00000000
mapcount:0 count:0 (Tainted: G    B)
Jul 26 22:58:37 ns1 kernel: Trying to fix it up, but a reboot is needed
Jul 26 22:58:37 ns1 kernel: Backtrace:
Jul 26 22:58:37 ns1 kernel:  <c044069f> bad_page+0x4a/0x71  <c0440a44>
__free_pages_ok+0x87/0x12a
Jul 26 22:58:37 ns1 kernel:  <c04cfacd> memmove+0xe/0x22  <c0454510>
kmem_freepages+0x6e/0x88
Jul 26 22:58:37 ns1 kernel:  <c045464a> slab_destroy+0x53/0x6c  <c04549e2>
cache_reap+0x14e/0x19f
Jul 26 22:58:37 ns1 kernel:  <c0427729> run_workqueue+0x76/0xb3  <c0454894>
cache_reap+0x0/0x19f
Jul 26 22:58:37 ns1 kernel:  <c04277f3> worker_thread+0x0/0x10b  <c04278ce>
worker_thread+0xdb/0x10b
Jul 26 22:58:37 ns1 kernel:  <c04177bc> default_wake_function+0x0/0xc
<c042a0b4> kthread+0x90/0xbc
Jul 26 22:58:37 ns1 kernel:  <c042a024> kthread+0x0/0xbc  <c0401005>
kernel_thread_helper+0x5/0xb
Jul 26 22:58:37 ns1 kernel: Bad page state in process 'events/0'
Jul 26 22:58:37 ns1 kernel: page:c1007540 flags:0x00000400 mapping:00000000
mapcount:0 count:0 (Tainted: G    B)
Jul 26 22:58:37 ns1 kernel: Trying to fix it up, but a reboot is needed
Jul 26 22:58:37 ns1 kernel: Backtrace:
Jul 26 22:58:37 ns1 kernel:  <c044069f> bad_page+0x4a/0x71  <c0440a44>
__free_pages_ok+0x87/0x12a
Jul 26 22:58:37 ns1 kernel:  <c04cfacd> memmove+0xe/0x22  <c0454510>
kmem_freepages+0x6e/0x88
Jul 26 22:58:37 ns1 kernel:  <c045464a> slab_destroy+0x53/0x6c  <c04549e2>
cache_reap+0x14e/0x19f
Jul 26 22:58:37 ns1 kernel:  <c0427729> run_workqueue+0x76/0xb3  <c0454894>
cache_reap+0x0/0x19f
Jul 26 22:58:37 ns1 kernel:  <c04277f3> worker_thread+0x0/0x10b  <c04278ce>
worker_thread+0xdb/0x10b
Jul 26 22:58:37 ns1 kernel:  <c04177bc> default_wake_function+0x0/0xc
<c042a0b4> kthread+0x90/0xbc
Jul 26 22:58:37 ns1 kernel:  <c042a024> kthread+0x0/0xbc  <c0401005>
kernel_thread_helper+0x5/0xb
Jul 26 22:58:37 ns1 kernel: Bad page state in process 'events/0'
Jul 26 22:58:37 ns1 kernel: page:c1007560 flags:0x00000400 mapping:00000000
mapcount:0 count:0 (Tainted: G    B)
Jul 26 22:58:37 ns1 kernel: Trying to fix it up, but a reboot is needed
Jul 26 22:58:37 ns1 kernel: Backtrace:
Jul 26 22:58:37 ns1 kernel:  <c044069f> bad_page+0x4a/0x71  <c0440a44>
__free_pages_ok+0x87/0x12a
Jul 26 22:58:37 ns1 kernel:  <c04cfacd> memmove+0xe/0x22  <c0454510>
kmem_freepages+0x6e/0x88
Jul 26 22:58:37 ns1 kernel:  <c045464a> slab_destroy+0x53/0x6c  <c04549e2>
cache_reap+0x14e/0x19f
Jul 26 22:58:37 ns1 kernel:  <c0427729> run_workqueue+0x76/0xb3  <c0454894>
cache_reap+0x0/0x19f
Jul 26 22:58:37 ns1 kernel:  <c04277f3> worker_thread+0x0/0x10b  <c04278ce>
worker_thread+0xdb/0x10b
Jul 26 22:58:37 ns1 kernel:  <c04177bc> default_wake_function+0x0/0xc
<c042a0b4> kthread+0x90/0xbc
Jul 26 22:58:37 ns1 kernel:  <c042a024> kthread+0x0/0xbc  <c0401005>
kernel_thread_helper+0x5/0xb

Should I open up a bug report with the above information?

Thanks,
Michael L. Young