On 09/03/2017 06:19 PM, Stewart Smith wrote: > Michael Ellerman <m...@ellerman.id.au> writes: >>> 2. On a bare metal machine, if you set ipr.fast_reboot=1 on the skiboot >>> kernel, then we should also avoid resetting the ipr adapter, so ipr >>> init on the kernel being kexec booted from skiboot should be extremely >>> fast. >> >> OK, I didn't know that was an option, so that might help. >> >>> ... >>> If you've got cases where ipr init is taking a long time, I'd be >>> interested to know what scenarios are the most annoying to see if there >>> is any opportunity to improve. >> >> Yeah booting bare metal is where I see it (not using ipr.fast_reboot). > > Hrm... We should probably enable that by default for petitboot then. > > It'd at least cut some time off booting straight through to OS.
Agreed. I'd be interested to hear if that helps address the issue Michael is seeing. You can easily test this by exiting to a petitboot shell: echo 1 > /sys/module/ipr/parameters/fast_reboot Then go back to petitboot and boot the OS. Thanks, Brian -- Brian King Power Linux I/O IBM Linux Technology Center
