On 25.07.2017 21:55, Helge Deller wrote: > On 25.07.2017 21:47, Rolf Eike Beer wrote: >> Helge Deller wrote: >>> Some machines can't power off the machine, so disable the lockup detectors >>> to avoid this watchdog BUG to show up every few seconds: >>> watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [systemd-shutdow:1] >> >> I don't think HPPA is the only architecture that has this problem, > > Maybe. > I haven't heard of others yet, probably because most other architectures > do power off themselves, so they won't see this problem. > >> so isn't there a generic solution? Or: is it time to add one? > > Sure, you are welcome to test, post and discuss patches upstream if you like. By the way, I still see another lockup once (workqueue lockup) even after this patch. In general it seems most lockup detectors don't unregister themselves in the poweroff/shutdown phase (which might be intentional): [ 123.664431] BUG: workqueue lockup - pool cpus=0 node=0 flags=0x0 nice=0 stuck for 36s! [ 123.857429] Showing busy workqueues and worker pools: [ 123.917919] workqueue events: flags=0x0 [ 123.963830] pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=1/256 [ 123.967817] pending: vmstat_shepherd [ 124.082949] workqueue events_freezable: flags=0x4 [ 124.139364] pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=1/256 [ 124.143350] pending: pci_pme_list_scan [ 124.260448] workqueue events_power_efficient: flags=0x80 [ 124.324059] pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=1/256 [ 124.328045] pending: neigh_periodic_work [ 124.447237] workqueue mm_percpu_wq: flags=0x8 [ 124.499488] pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=1/256 [ 124.510543] pending: vmstat_update [ 124.616432] workqueue mpt_poll_1: flags=0x8 [ 124.666595] pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=1/256 [ 124.673079] pending: mpt_fault_reset_work Helge -- To unsubscribe from this list: send the line "unsubscribe linux-parisc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
