cdrom_ioctl() hanging in 2.6.3

cdrom_ioctl() hanging in 2.6.3

[Andrew Morton]

Gents,

apparently KDE's `k3b' command is consistently hanging when accessing a
SCSI CDROM.  See http://bugs.kde.org/show_bug.cgi?id=75553

Frank has generated a stack backtrace, below.

Is this an adaptec driver problem, or a generic thing?

Thanks.


k3b           D 000000000eb40f2f     0  1848   1811                     (NOTLB)
000001007889db78 0000000000000006 000001000268c080 ffffffff8027bb57
       000001003cc14100 0000000000000073 000001003ff9abf0 000001003cc14438
       0000010002705c00 0000000000000000
Call Trace:<ffffffff8027bb57>{ahc_linux_run_device_queue+1703}
       <ffffffff80133715>{wait_for_completion+213} <ffffffff801333a0>{default_wake_function+0}
       <ffffffff802617da>{scsi_request_fn+1034} <ffffffff801333a0>{default_wake_function+0}
       <ffffffff80241c03>{blk_do_rq+179} <ffffffff80135f00>{autoremove_wake_function+0}
       <ffffffff80242068>{sg_io+600} <ffffffff80242842>{scsi_cmd_ioctl+914}
       <ffffffff8016879d>{do_no_page+1069} <ffffffffa004b036>{:sr_mod:sr_media_change+54}
       <ffffffffa004154c>{:cdrom:media_changed+76} <ffffffff801813c6>{check_disk_change+38}
       <ffffffffa00426cd>{:cdrom:cdrom_ioctl+77} <ffffffff80181aef>{blkdev_open+47}
       <ffffffff802409f4>{blkdev_ioctl+900} <ffffffff8018d78c>{sys_ioctl+604}
       <ffffffff8010ff40>{system_call+124}

I hope this helps,
Frank

Re: cdrom_ioctl() hanging in 2.6.3

[Joachim Geiler]

Andrew Morton wrote:

> 
> Gents,
> 
> apparently KDE's `k3b' command is consistently hanging when accessing a
> SCSI CDROM.  See http://bugs.kde.org/show_bug.cgi?id=75553
> 
> Frank has generated a stack backtrace, below.
> 
> Is this an adaptec driver problem, or a generic thing?
> 
> Thanks.
Hello,

I have the same problems with k3b and a symbios scsi controller (sym53c875).
Hangs with 2.6.3rc3, 2.6.3mm1, 2.6.3mm2, but not with 2.6.1mm3 (tried only
these kernels).

Joachim
 

Re: cdrom_ioctl() hanging in 2.6.3

[Joachim Geiler]

Joachim Geiler wrote:

> Andrew Morton wrote:
> 
>> 
>> Gents,
>> 
>> apparently KDE's `k3b' command is consistently hanging when accessing a
>> SCSI CDROM.  See http://bugs.kde.org/show_bug.cgi?id=75553
>> 
>> Frank has generated a stack backtrace, below.
>> 
>> Is this an adaptec driver problem, or a generic thing?
>> 
>> Thanks.

Hello again,

I did a strace of the syscalls of k3b before it hangs (kernel 2.6.3mm2). I
think the following tail of the trace may be of interest:


lstat64("/dev/sr0", {st_mode=S_IFBLK|0660, st_rdev=makedev(11, 0), ...}) = 0
open("/dev/sr0", O_RDONLY|O_NONBLOCK)   = 12
fstat64(12, {st_mode=S_IFBLK|0660, st_rdev=makedev(11, 0), ...}) = 0
ioctl(12, 0x5321, 0x1)                  = 12
close(12)                               = 0
open("/dev/sr0", O_RDONLY|O_NONBLOCK)   = 12
fstat64(12, {st_mode=S_IFBLK|0660, st_rdev=makedev(11, 0), ...}) = 0
ioctl(12, 0x5382, 0xbfffdc58)           = 0
ioctl(12, 0x5386, 0xbfffdd24)           = 0
close(12)                               = 0
open("/dev/sr0", O_RDONLY|O_NONBLOCK)   = 12
ioctl(12, 0x5393 <unfinished ...>

Here the process hangs in D state....

/dev/sr0 is a yamaha cdrw 6416 at symbios 53c875.


Joachim
 

Re: cdrom_ioctl() hanging in 2.6.3

[Jens Axboe]

On Mon, Feb 23 2004, Joachim Geiler wrote:
> Joachim Geiler wrote:
> 
> > Andrew Morton wrote:
> > 
> >> 
> >> Gents,
> >> 
> >> apparently KDE's `k3b' command is consistently hanging when accessing a
> >> SCSI CDROM.  See http://bugs.kde.org/show_bug.cgi?id=75553
> >> 
> >> Frank has generated a stack backtrace, below.
> >> 
> >> Is this an adaptec driver problem, or a generic thing?
> >> 
> >> Thanks.
> 
> Hello again,
> 
> I did a strace of the syscalls of k3b before it hangs (kernel 2.6.3mm2). I
> think the following tail of the trace may be of interest:

See the other threads on same list about this, problem has been solved.

-- 
Jens Axboe