On Thu, 2015-05-07 at 15:00 +0530, Vipin K Parashar wrote: > This patch adds support for FSP EPOW (Early Power Off Warning) and > DPO (Delayed Power Off) events support for PowerNV platform. EPOW events > are generated by SPCN/FSP due to various critical system conditions that > need system shutdown. Few examples of these conditions are high ambient > temperature or system running on UPS power with low UPS battery. DPO event > is generated in response to admin initiated system shutdown request. > This patch enables host kernel on PowerNV platform to handle OPAL > notifications for these events and initiate system poweroff. Since EPOW > notifications are sent in advance of impending shutdown event and thus > this patch also adds functionality to wait for EPOW condition to return to > normal. Host allows MAX_POWEROFF_SYS_TIME (600 seconds) as system > poweroff time (time for host + guests shutdown) and waits for remaining > time for EPOW condition to return to normal. If EPOW condition doesn't > return to normal in calculated time it proceeds with graceful system > shutdown. For EPOW events with smaller timeouts values than > MAX_POWEROFF_SYS_TIME it proceeds with system shutdown without any wait > for EPOW condition to return to normal.
Can I suggest an alternative design: - when we recieve a DPO event call orderly_poweroff() - when we recieve an EPOW event call orderly_poweroff() Thoughts? cheers _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
