[v2,00/14] transfer page to folio in KSM

Message

[e-mail] March 22, 2024, 8:36 a.m. UTC

From: "Alex Shi (tencent)" <[e-mail]>

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 81kbytes from 2570760 bytes on latest
akpm/mm-stable branch with CONFIG_DEBUG_VM enabled.

Alex Shi (tencent) (14):
  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 folio
  mm/ksm: Convert stable_tree_insert to use folio
  mm/ksm: Convert stable_tree_search to use folio
  mm/ksm: return folio for chain series funcs
  mm/ksm: remove get_ksm_page and related info
  mm/ksm: use folio_set_stable_node in try_to_merge_one_page
  mm/ksm: remove set_page_stable_node

 mm/ksm.c     | 259 ++++++++++++++++++++++++++-------------------------
 mm/migrate.c |   2 +-
 2 files changed, 131 insertions(+), 130 deletions(-)