On Thu, Mar 10, 2016 at 07:07:02AM +0000, Eric Wheeler wrote: > It would be interesting to add a sysrq that calls all reboot notifiers, or > does an 'o' but reboots instead. It would be interesting to hunt these > down and find out what they do, exactly. hmmm... > > http://lxr.free-electrons.com/source/Documentation/sysrq.txt > 196 * I want to add SysRQ key events to a module, how does it work? > 198 In order to register a basic function with the table, you must first include > 199 the header 'include/linux/sysrq.h' [...] > > Hey, try this and see if it works. Use '.' as the sysrq key for reboot or > `echo . > /proc/sysrq-trigger`. Not sure if that's a valid key from > sysrq, but if it does what you like, I'll post to lmkl and see what they > have to say about it: Eh, talk about extra credit, thanks much for that. I changed the key to 'x' because '.' didn't work, but otherwise it seems to have worked fine, so thanks a bunch for that. I'm surprised that we'd be the first people to notice this need, but it's never too late to make linux better :) so thanks for your patch, and indeed I think it's worth sending upstream for consideration. [ 622.392830] sysrq: SysRq : HELP : loglevel(0-9) reboot(b) crash(c) terminate-all-tasks(e) memory-full-oom-kill(f) kill-all-tasks(i) thaw-filesystems(j) sak(k) show-backtrace-all-active-cpus(l) show-memory-usage(m) nice-all-RT-tasks(n) poweroff(o) show-registers(p) show-all-timers(q) unraw(r) sync(s) show-task-states(t) unmount(u) force-fb(V) show-blocked-tasks(w) kernel_restart(x) dump-ftrace-buffer(z) [ 630.587827] sysrq: SysRq : Gracefullish Restart [ 653.840897] bcache: bcache_reboot() Stopping all devices: [ 653.857210] bcache: bcache_device_free() bcache0 stopped [ 655.841896] bcache: bcache_reboot() Timeout waiting for devices to be closed [ 655.863099] kvm: exiting hardware virtualization [ 655.877707] sd 17:0:0:0: [sdr] Synchronizing SCSI cache [ 655.897948] sd 16:0:0:0: [sdq] Synchronizing SCSI cache [ 655.917940] sd 15:0:0:0: [sdp] Synchronizing SCSI cache [ 655.937941] sd 14:0:0:0: [sdo] Synchronizing SCSI cache [ 655.957938] sd 13:0:0:0: [sdn] Synchronizing SCSI cache [ 655.973718] sd 11:4:0:0: [sdm] Synchronizing SCSI cache [ 655.991024] sd 11:3:0:0: [sdl] Synchronizing SCSI cache [ 656.008218] sd 11:2:0:0: [sdk] Synchronizing SCSI cache [ 656.025367] sd 11:1:0:0: [sdj] Synchronizing SCSI cache [ 656.042531] sd 11:0:0:0: [sdi] Synchronizing SCSI cache [ 656.059546] sd 9:0:0:0: [sdh] Synchronizing SCSI cache [ 656.076342] sd 8:0:0:0: [sdg] Synchronizing SCSI cache [ 656.167161] sd 3:0:0:0: [sdf] Synchronizing SCSI cache [ 656.184725] sd 2:0:0:0: [sde] Synchronizing SCSI cache [ 656.202491] sd 1:0:1:0: [sdd] Synchronizing SCSI cache [ 656.219932] sd 1:0:0:0: [sdc] Synchronizing SCSI cache [ 656.237140] sd 0:0:1:0: [sdb] Synchronizing SCSI cache [ 656.254206] sd 0:0:0:0: [sda] Synchronizing SCSI cache [ 656.271897] reboot: Restarting system [ 656.284158] reboot: machine restart [ 656.296061] ACPI MEMORY or I/O RESET_REG. Thanks, Marc -- "A mouse is a device used to point at the xterm you want to type in" - A.S.R. Microsoft is to operating systems .... .... what McDonalds is to gourmet cooking Home page: http://marc.merlins.org/ | PGP 1024R/763BE901 -- To unsubscribe from this list: send the line "unsubscribe linux-bcache" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
