[PATCH 3/8] mm: shmem: add an 'order' parameter for shmem_alloc_hugefolio()

From: Baolin Wang
Date: Mon May 06 2024 - 04:47:32 EST


Add a new parameter to specify the huge page order for shmem_alloc_hugefolio(),
as a preparation to supoort mTHP.

Signed-off-by: Baolin Wang <baolin.wang@xxxxxxxxxxxxxxxxx>
---
mm/shmem.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/mm/shmem.c b/mm/shmem.c
index fa2a0ed97507..e4483c4596a8 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -1604,14 +1604,14 @@ static gfp_t limit_gfp_mask(gfp_t huge_gfp, gfp_t limit_gfp)
}

static struct folio *shmem_alloc_hugefolio(gfp_t gfp,
- struct shmem_inode_info *info, pgoff_t index)
+ struct shmem_inode_info *info, pgoff_t index, int order)
{
struct mempolicy *mpol;
pgoff_t ilx;
struct page *page;

- mpol = shmem_get_pgoff_policy(info, index, HPAGE_PMD_ORDER, &ilx);
- page = alloc_pages_mpol(gfp, HPAGE_PMD_ORDER, mpol, ilx, numa_node_id());
+ mpol = shmem_get_pgoff_policy(info, index, order, &ilx);
+ page = alloc_pages_mpol(gfp, order, mpol, ilx, numa_node_id());
mpol_cond_put(mpol);

return page_rmappable_folio(page);
@@ -1660,7 +1660,7 @@ static struct folio *shmem_alloc_and_add_folio(gfp_t gfp,
index + HPAGE_PMD_NR - 1, XA_PRESENT))
return ERR_PTR(-E2BIG);

- folio = shmem_alloc_hugefolio(gfp, info, index);
+ folio = shmem_alloc_hugefolio(gfp, info, index, HPAGE_PMD_ORDER);
if (!folio)
count_vm_event(THP_FILE_FALLBACK);
} else {
--
2.39.3