On Thu, 2015-05-03 at 02:25:38 UTC, Tyrel Datwyler wrote: > The /sys/kernel/mobility/migration interface was added all the way back > in 2.6.37. However, the drmgr userspace tool was never augmented to use > this interface to perfrom migrations. Instead it has continued using a > faux rtas call coupled with performing the device tree update processing > in userspace and communicating it back to the kernel via the ugly > /proc/ppc64/ofdt interface. > > Up until 3.12 the device tree update code in the kernel was badly broken > and bit rotting. This code was fixed in 3.12 and is now utilized by the > kernel suspend code as of 3.15. The kernel is now better suited to > handle the post-mobility fixup of the device tree and drmgr should be > transitioned to using the sysfs migration interface. > > This patch introduces the api_version sysfs file to /sys/kernel/mobility > as a means for drmgr to query the current implementation level of the > kernel migration code. This initial versioning indicates it is capable > of perfroming all current PAPR requirements for migration including the > post-mobility firmware activation and device tree update.
I've put this in next. Please send a follow-up patch that adds documentation for this and the other sysfs files in Documentation/ABI. cheers _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
