Memory hotplug is leading to hash page table calls, even on radix:
...
arch_add_memory
create_section_mapping
htab_bolt_mapping
BUG_ON(!ppc_md.hpte_insert);
Refactor {create,remove}_section_mapping() into hash__ and radix__ variants.
RFC/TODO:
I wasn't sure what to do in radix__remove_section_mapping(). Its vmemmap
counterpart radix__vmemmap_remove_mapping() is stubbed as a FIXME. I left it
empty for now.
v2:
* Do not simply fall through to vmemmap_{create,remove}_mapping(). As Aneesh
and Michael pointed out, they are tied to CONFIG_SPARSEMEM_VMEMMAP and only
did what I needed by luck anyway.
v1:
*
https://lkml.kernel.org/r/1466699962-22412-1-git-send-email-ar...@linux.vnet.ibm.com
Reza Arbab (2):
powerpc/mm: refactor {create,remove}_section_mapping()
powerpc/mm: add radix__{create,remove}_section_mapping()
arch/powerpc/include/asm/book3s/64/hash.h | 5 +++++
arch/powerpc/include/asm/book3s/64/radix.h | 5 +++++
arch/powerpc/include/asm/sparsemem.h | 22 ++++++++++++++++++++--
arch/powerpc/mm/hash_utils_64.c | 4 ++--
arch/powerpc/mm/pgtable-radix.c | 23 +++++++++++++++++++++++
5 files changed, 55 insertions(+), 4 deletions(-)
--
1.8.3.1
*** BLURB HERE ***
Reza Arbab (2):
powerpc/mm: refactor {create,remove}_section_mapping()
powerpc/mm: add radix__{create,remove}_section_mapping()
arch/powerpc/include/asm/book3s/64/hash.h | 5 +++++
arch/powerpc/include/asm/book3s/64/radix.h | 5 +++++
arch/powerpc/include/asm/sparsemem.h | 22 ++++++++++++++++++++--
arch/powerpc/mm/hash_utils_64.c | 4 ++--
arch/powerpc/mm/pgtable-radix.c | 23 +++++++++++++++++++++++
5 files changed, 55 insertions(+), 4 deletions(-)
--
1.8.3.1
