From: "Alex Shi (tencent)" <alexs@xxxxxxxxxx> This is the first part of page to folio transfer on KSM. Since only single page could be stored in KSM, we could safely transfer stable tree pages to folios. This patchset could reduce ksm.o 57kbytes from 2541776 bytes on latest akpm/mm-stable branch with CONFIG_DEBUG_VM enabled. It pass the KSM testing in LTP and kernel selftest. Thanks for Matthew Wilcox and David Hildenbrand's suggestions and comments! Alex Shi (tencent) (9): mm/ksm: add ksm_get_folio mm/ksm: use folio in remove_rmap_item_from_tree mm/ksm: add folio_set_stable_node mm/ksm: use folio in remove_stable_node mm/ksm: use folio in stable_node_dup mm/ksm: use ksm_get_folio in scan_get_next_rmap_item mm/ksm: use folio in write_protect_page mm/ksm: Convert chain series funcs to use and return folios mm/ksm: replace set_page_stable_node by folio_set_stable_node mm/ksm.c | 263 ++++++++++++++++++++++++++------------------------- mm/migrate.c | 2 +- 2 files changed, 134 insertions(+), 131 deletions(-) -- 2.43.0
