Changelog:
v1 - v2
- Addressed comments from Oscar Salvador
In sparse_init() we allocate two large buffers to temporary hold usemap and
memmap for the whole machine. However, we can avoid doing that if we
changed sparse_init() to operated on per-node bases instead of doing it on
the whole machine beforehand.
As shown by Baoquan
http://lkml.kernel.org/r/20180628062857.29658-1-...@redhat.com
The buffers are large enough to cause machine stop to boot on small memory
systems.
These patches should be applied on top of Baoquan's work, as
CONFIG_SPARSEMEM_ALLOC_MEM_MAP_TOGETHER is removed in that work.
For the ease of review, I split this work so the first patch only adds new
interfaces, the second patch enables them, and removes the old ones.
Pavel Tatashin (2):
mm/sparse: add sparse_init_nid()
mm/sparse: start using sparse_init_nid(), and remove old code
include/linux/mm.h | 9 +-
mm/sparse-vmemmap.c | 44 ++++---
mm/sparse.c | 282 +++++++++++++++-----------------------------
3 files changed, 125 insertions(+), 210 deletions(-)
--
2.18.0
