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KVM: guest_memfd: Don't set FGP_ACCESSED when getting folios

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guest_memfd folios don't care about accessed flags since the memory is
unevictable and there is no storage to write back to, hence, cleanup the
allocation path by not setting FGP_ACCESSED.

Signed-off-by: Ackerley Tng <ackerleytng@google.com>
[sean: split to separate patch]
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: David Hildenbrand (arm) <david@kernel.org>
Link: https://patch.msgid.link/20260129172646.2361462-1-ackerleytng@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
This commit is contained in:
Ackerley Tng
2026-01-29 09:26:46 -08:00
committed by Sean Christopherson
parent 11439c4635
commit 6dad5447c7
1 changed files with 2 additions and 3 deletions
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5
virt/kvm/guest_memfd.c
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@@ -126,14 +126,13 @@ static struct folio *kvm_gmem_get_folio(struct inode *inode, pgoff_t index)
* Fast-path: See if folio is already present in mapping to avoid
* policy_lookup.
*/
folio = __filemap_get_folio(inode->i_mapping, index,
FGP_LOCK | FGP_ACCESSED, 0);
folio = filemap_lock_folio(inode->i_mapping, index);
if (!IS_ERR(folio))
return folio;
policy = mpol_shared_policy_lookup(&GMEM_I(inode)->policy, index);
folio = __filemap_get_folio_mpol(inode->i_mapping, index,
FGP_LOCK | FGP_ACCESSED | FGP_CREAT,
FGP_LOCK | FGP_CREAT,
mapping_gfp_mask(inode->i_mapping), policy);
mpol_cond_put(policy);