On Mon, 15 Jun 2020 17:58:46 +0200 Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx> wrote: > On 2020-06-15 17:41:06 [+0200], Stephen Berman wrote: >> > If you do this "t" then there should be a lot of output on your console. >> > If you do this from an xterm then you can see the output after typing >> > "dmesg". The output should appear also in your system log. >> >> Ah, ok, I do see it in the log, it looks basically the same as the call >> trace I posted upthread. I wonder why there was no such output in the >> console, could there be some setting that suppresses it even though >> /proc/sys/kernel/sysrq has `1'? > > You have ignore_loglevel soo everything should appear on your console. > The is true for your tty / ctrl+alt+f1 but your xterm shell. Yet that appears not to be the case here, or I'm still doing something wrong 🤷 >> There were in fact 99 "Start .* acpi_ev_notify_dispatch" messages and 98 >> "End .* acpi_ev_notify_dispatch" messages. Here's the last of them >> before I rebooted: [...] >> acpi_os_execute_deferred_notify(851) Start ffff8d7aa8758a80 >> acpi_ev_notify_dispatch+0x0/0x55(ffff8d7aa84e70a0) >> Jun 15 08:58:26 strobe-jhalfs kernel: [ 194.339017] acpi_os_execute(1109) >> Adding acpi_ev_notify_dispatch+0x0/0x55 ffff8d7aa99a6730 <ffff8d7aabb384c0> >> Jun 15 08:58:27 strobe-jhalfs kernel: [ 195.363005] acpi_os_execute(1109) >> Adding acpi_ev_notify_dispatch+0x0/0x55 ffff8d7aa99a6780 <ffff8d7aabb38500> >> Jun 15 08:58:27 strobe-jhalfs kernel: [ 195.367978] >> acpi_os_execute_deferred_notify(853) End ffff8d7aa8758a80 [...] > Okay. So there is "Adding" of four events/work items in total, each > almost every second. > Processing of one work-item took two seconds, the other one took a > second. These events are "old" so I don't see the "adding" line for the > Start/End. > You could look in the log for ffff8d7aa8758a80 to seen when it was > enqueued but it feels like ACPI enqueues more events then it is capable > of processing. It's there, 196 lines above the Start ffff8d7aa8758a80 line: Jun 15 08:56:58 strobe-jhalfs kernel: [ 106.275356] acpi_os_execute(1109) Adding acpi_ev_notify_dispatch+0x0/0x55 ffff8d7aa84e70a0 <ffff8d7aa8758a80> Steve Berman
