Commit 2916ecc0f9d4 ("mm/migrate: new migrate mode MIGRATE_SYNC_NO_COPY")
introduce a new MIGRATE_SYNC_NO_COPY mode to allow to offload the copy to
a device DMA engine, which is only used __migrate_device_pages() to decide
whether or not copy the old page, and the MIGRATE_SYNC_NO_COPY mode only
used in hmm, a easy way is just to call the folio_migrate_mapping() and
folio_migrate_flags(), which help to remove the MIGRATE_SYNC_NO_COPY
mode.
---
This is splitted from "mm: migrate: support poison recover from migrate
folio"[1] to make it easier review and hope it merged firstly since no
more comment for a long time, rebase on next-20240523 and only patch2
changed a bit due to commit e18a9faf06c2.
[1] https://lore.kernel.org/linux-mm/20240424135929.2847185-9-wangkefeng.wang@xxxxxxxxxx/
Kefeng Wang (5):
mm: migrate: simplify __buffer_migrate_folio()
mm: migrate_device: use a newfolio in __migrate_device_pages()
mm: migrate_device: unify migrate folio for MIGRATE_SYNC_NO_COPY
mm: migrate: remove migrate_folio_extra()
mm: remove MIGRATE_SYNC_NO_COPY mode
fs/aio.c | 12 +--------
fs/hugetlbfs/inode.c | 5 +---
include/linux/migrate.h | 2 --
include/linux/migrate_mode.h | 5 ----
mm/balloon_compaction.c | 8 ------
mm/migrate.c | 51 +++++++++---------------------------
mm/migrate_device.c | 22 +++++++++-------
mm/zsmalloc.c | 8 ------
8 files changed, 27 insertions(+), 86 deletions(-)
--
2.27.0
