Re: cdrom_ioctl() hanging in 2.6.3

[Joachim Geiler <Joachim.Geiler@t-online.de>]

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