diff options
| author | Kefeng Wang <wangkefeng.wang@huawei.com> | 2024-06-26 16:53:24 +0800 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2024-07-06 11:53:19 -0700 |
| commit | 02f4ee5a144cef6b26421cb42cca64bb4138d459 (patch) | |
| tree | 7bc7ee3e5a53bd64167bf3c6a96d3d271a2ae359 /mm/util.c | |
| parent | 28bdacbcb36d093e23734acccecd139f5fc05f67 (diff) | |
mm: add folio_mc_copy()
Add a #MC variant of folio_copy() which uses copy_mc_highpage() to support
#MC handled during folio copy, it will be used in folio migration soon.
Link: https://lkml.kernel.org/r/20240626085328.608006-3-wangkefeng.wang@huawei.com
Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Reviewed-by: Jane Chu <jane.chu@oracle.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: Lance Yang <ioworker0@gmail.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Muchun Song <muchun.song@linux.dev>
Cc: Naoya Horiguchi <nao.horiguchi@gmail.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Vishal Moola (Oracle) <vishal.moola@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/util.c')
| -rw-r--r-- | mm/util.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/mm/util.c b/mm/util.c index fe723241b66f..172213f27c31 100644 --- a/mm/util.c +++ b/mm/util.c @@ -828,6 +828,23 @@ void folio_copy(struct folio *dst, struct folio *src) } EXPORT_SYMBOL(folio_copy); +int folio_mc_copy(struct folio *dst, struct folio *src) +{ + long nr = folio_nr_pages(src); + long i = 0; + + for (;;) { + if (copy_mc_highpage(folio_page(dst, i), folio_page(src, i))) + return -EHWPOISON; + if (++i == nr) + break; + cond_resched(); + } + + return 0; +} +EXPORT_SYMBOL(folio_mc_copy); + int sysctl_overcommit_memory __read_mostly = OVERCOMMIT_GUESS; int sysctl_overcommit_ratio __read_mostly = 50; unsigned long sysctl_overcommit_kbytes __read_mostly; |