On Thu, Aug 02, 2018 at 10:44:42AM -0700, Bart Van Assche wrote: > Surround scsi_execute() calls with scsi_autopm_get_device() and > scsi_autopm_put_device(). Note: removing sr_mutex protection from > the scsi_cd_get() and scsi_cd_put() calls is safe because the > purpose of sr_mutex is to serialize cdrom_*() calls. > [...] Hi Bart, With this patch I still have the hang on next-20180801: [ 247.875657] INFO: task swapper/0:1 blocked for more than 120 seconds. [ 247.877560] Not tainted 4.18.0-rc7-next-20180801+ #131 [ 247.878703] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 247.880497] swapper/0 D13496 1 0 0x80000000 [ 247.881542] Call Trace: [ 247.882638] ? __schedule+0x253/0x700 [ 247.882898] schedule+0x23/0x80 [ 247.883149] async_synchronize_cookie_domain+0x89/0xd0 [ 247.883509] ? wait_woken+0x80/0x80 [ 247.883712] ? rest_init+0xb0/0xb0 [ 247.883907] kernel_init+0xa/0x100 [ 247.884096] ret_from_fork+0x35/0x40 [ 370.755258] INFO: task swapper/0:1 blocked for more than 120 seconds. [ 370.756735] Not tainted 4.18.0-rc7-next-20180801+ #131 [ 370.757931] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 370.759417] swapper/0 D13496 1 0 0x80000000 [ 370.760567] Call Trace: [ 370.761141] ? __schedule+0x253/0x700 [ 370.761982] schedule+0x23/0x80 [ 370.762534] async_synchronize_cookie_domain+0x89/0xd0 [ 370.762818] ? wait_woken+0x80/0x80 [ 370.763020] ? rest_init+0xb0/0xb0 [ 370.763279] kernel_init+0xa/0x100 [ 370.763478] ret_from_fork+0x35/0x40 [ 493.635108] INFO: task swapper/0:1 blocked for more than 120 seconds. [ 493.636403] Not tainted 4.18.0-rc7-next-20180801+ #131 [ 493.637449] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 493.638803] swapper/0 D13496 1 0 0x80000000 [ 493.639963] Call Trace: [ 493.640669] ? __schedule+0x253/0x700 [ 493.641446] schedule+0x23/0x80 [ 493.642023] async_synchronize_cookie_domain+0x89/0xd0 [ 493.643114] ? wait_woken+0x80/0x80 [ 493.643923] ? rest_init+0xb0/0xb0 [ 493.644411] kernel_init+0xa/0x100 [ 493.644680] ret_from_fork+0x35/0x40 [ 616.515472] INFO: task swapper/0:1 blocked for more than 120 seconds. [ 616.516773] Not tainted 4.18.0-rc7-next-20180801+ #131 [ 616.517790] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 616.519260] swapper/0 D13496 1 0 0x80000000 [ 616.520322] Call Trace: [ 616.520854] ? __schedule+0x253/0x700 [ 616.521662] schedule+0x23/0x80 [ 616.522249] async_synchronize_cookie_domain+0x89/0xd0 [ 616.523402] ? wait_woken+0x80/0x80 [ 616.524002] ? rest_init+0xb0/0xb0 [ 616.524779] kernel_init+0xa/0x100 [ 616.525054] ret_from_fork+0x35/0x40 [ 739.394997] INFO: task swapper/0:1 blocked for more than 120 seconds. [ 739.396351] Not tainted 4.18.0-rc7-next-20180801+ #131 [ 739.397411] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 739.398751] swapper/0 D13496 1 0 0x80000000 [ 739.399841] Call Trace: [ 739.400506] ? __schedule+0x253/0x700 [ 739.401152] schedule+0x23/0x80 [ 739.401856] async_synchronize_cookie_domain+0x89/0xd0 [ 739.402527] ? wait_woken+0x80/0x80 [ 739.402773] ? rest_init+0xb0/0xb0 [ 739.402997] kernel_init+0xa/0x100 [ 739.403311] ret_from_fork+0x35/0x40 [ 862.275229] INFO: task swapper/0:1 blocked for more than 120 seconds. [ 862.276636] Not tainted 4.18.0-rc7-next-20180801+ #131 [ 862.277882] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 862.279358] swapper/0 D13496 1 0 0x80000000 [ 862.280492] Call Trace: [ 862.281074] ? __schedule+0x253/0x700 [ 862.281958] schedule+0x23/0x80 [ 862.282765] async_synchronize_cookie_domain+0x89/0xd0 [ 862.283921] ? wait_woken+0x80/0x80 [ 862.284836] ? rest_init+0xb0/0xb0 [ 862.285327] kernel_init+0xa/0x100 [ 862.285520] ret_from_fork+0x35/0x40 [ 985.155031] INFO: task swapper/0:1 blocked for more than 120 seconds. [ 985.156626] Not tainted 4.18.0-rc7-next-20180801+ #131 [ 985.157699] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 985.159032] swapper/0 D13496 1 0 0x80000000 [ 985.160313] Call Trace: [ 985.160819] ? __schedule+0x253/0x700 [ 985.161303] schedule+0x23/0x80 [ 985.161480] async_synchronize_cookie_domain+0x89/0xd0 [ 985.161734] ? wait_woken+0x80/0x80 [ 985.161914] ? rest_init+0xb0/0xb0 [ 985.162080] kernel_init+0xa/0x100 [ 985.162334] ret_from_fork+0x35/0x40 -- Johannes Thumshirn Storage jthumshirn@xxxxxxx +49 911 74053 689 SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg GF: Felix Imendörffer, Jane Smithard, Graham Norton HRB 21284 (AG Nürnberg) Key fingerprint = EC38 9CAB C2C4 F25D 8600 D0D0 0393 969D 2D76 0850
