Mailinglist Archive: packet-writing (124 mails)

[Jens Axboe <axboe@xxxxxxx>]

Hi,

I think most of the hard hangs people are seeing are actually induced on
purpose. The BUG() will hard hang a machine at times, usually because
interrupts are disabled or just because we are holding a spin lock.
Because of that, to debug a hard hang without a serial console you can
do something like... :

#undef BUG
#define BUG() do { \
	printk("kernel BUG at %s:%d!\n", __FILE__, __LINE__); \
} while (0);

right before the SCSI_IOCTL_SEND_COMMAND define in
drivers/block/pktcdvd.c and recompile the kernel/module. _If_ you choose
to do so, look for these messages in your logs repeatedly -- I
definitely don't want to miss one of them, that's why they are BUG's
now.

-- 
Jens Axboe