From: Ackerley Tng Date: Thu, 29 Jan 2026 17:26:46 +0000 (-0800) Subject: KVM: guest_memfd: Don't set FGP_ACCESSED when getting folios X-Git-Url: http://git.ipfire.org/index.cgi?a=commitdiff_plain;h=6dad5447c7bfca26b5d72604b5378dca6dc58bbc;p=thirdparty%2Fkernel%2Flinux.git KVM: guest_memfd: Don't set FGP_ACCESSED when getting folios 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 [sean: split to separate patch] Acked-by: Vlastimil Babka Acked-by: David Hildenbrand (arm) Link: https://patch.msgid.link/20260129172646.2361462-1-ackerleytng@google.com Signed-off-by: Sean Christopherson --- diff --git a/virt/kvm/guest_memfd.c b/virt/kvm/guest_memfd.c index 017d84a7adf37..462c5c5cb602a 100644 --- a/virt/kvm/guest_memfd.c +++ b/virt/kvm/guest_memfd.c @@ -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);