On Tue, 15 Sep 2020 14:46:47 -0500, Scott Cheloha wrote:
> During memory hot-add, dlpar_add_lmb() calls memory_add_physaddr_to_nid()
> to determine which node id (nid) to use when later calling __add_memory().
>
> This is wasteful. On pseries, memory_add_physaddr_to_nid() finds an
> appropriate nid for a given address by looking up the LMB containing the
> address and then passing that LMB to of_drconf_to_nid_single() to get the
> nid. In dlpar_add_lmb() we get this address from the LMB itself.
>
> [...]
Applied to powerpc/next.
[1/1] pseries/hotplug-memory: hot-add: skip redundant LMB lookup
https://git.kernel.org/powerpc/c/72cdd117c449896c707fc6cfe5b90978160697d0
cheers
