Kernel/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-12-29 09:16:33 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

mm: migrate: simplify __buffer_migrate_folio()

Browse Source 
Patch series "mm: cleanup MIGRATE_SYNC_NO_COPY mode".

Commit 2916ecc0f9 ("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 patch (of 5):

Use filemap_migrate_folio() helper to simplify __buffer_migrate_folio().

Link: https://lkml.kernel.org/r/20240524052843.182275-1-wangkefeng.wang@huawei.com
Link: https://lkml.kernel.org/r/20240524052843.182275-2-wangkefeng.wang@huawei.com
Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Vishal Moola (Oracle) <vishal.moola@gmail.com>
Reviewed-by: Miaohe Lin <linmiaohe@huawei.com>
Cc: Alistair Popple <apopple@nvidia.com>
Cc: Benjamin LaHaise <bcrl@kvack.org>
Cc: David Hildenbrand <david@redhat.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Jérôme Glisse <jglisse@redhat.com>
Cc: Jiaqi Yan <jiaqiyan@google.com>
Cc: Muchun Song <muchun.song@linux.dev>
Cc: Naoya Horiguchi <nao.horiguchi@gmail.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Zi Yan <ziy@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Kefeng Wang 2024-05-24 13:28:39 +08:00 committed by Andrew Morton
parent 1df0724348
commit 01878f10f8
1 changed files with 1 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
mm/migrate.c
View File

@ -777,24 +777,16 @@ static int __buffer_migrate_folio(struct address_space *mapping,
}
}
rc = folio_migrate_mapping(mapping, dst, src, 0);
rc = filemap_migrate_folio(mapping, dst, src, mode);
if (rc != MIGRATEPAGE_SUCCESS)
goto unlock_buffers;
folio_attach_private(dst, folio_detach_private(src));
bh = head;
do {
folio_set_bh(bh, dst, bh_offset(bh));
bh = bh->b_this_page;
} while (bh != head);
if (mode != MIGRATE_SYNC_NO_COPY)
folio_migrate_copy(dst, src);
else
folio_migrate_flags(dst, src);
rc = MIGRATEPAGE_SUCCESS;
unlock_buffers:
if (check_refs)
spin_unlock(&mapping->i_private_lock);