Re: [PATCH v4 20/25] mm/mlock: Skip ZONE_DEVICE PMDs during mlock
From: David Hildenbrand <hidden>
Date: 2024-12-17 22:28:14
Also in:
linux-arm-kernel, linux-cxl, linux-doc, linux-ext4, linux-fsdevel, linux-mm, linux-xfs, lkml, nvdimm
On 17.12.24 06:13, Alistair Popple wrote:
quoted hunk ↗ jump to hunk
At present mlock skips ptes mapping ZONE_DEVICE pages. A future change to remove pmd_devmap will allow pmd_trans_huge_lock() to return ZONE_DEVICE folios so make sure we continue to skip those. Signed-off-by: Alistair Popple <apopple@nvidia.com> --- mm/mlock.c | 2 ++ 1 file changed, 2 insertions(+)diff --git a/mm/mlock.c b/mm/mlock.c index cde076f..3cb72b5 100644 --- a/mm/mlock.c +++ b/mm/mlock.c@@ -368,6 +368,8 @@ static int mlock_pte_range(pmd_t *pmd, unsigned long addr, if (is_huge_zero_pmd(*pmd)) goto out; folio = pmd_folio(*pmd); + if (folio_is_zone_device(folio)) + goto out; if (vma->vm_flags & VM_LOCKED) mlock_folio(folio); else
Acked-by: David Hildenbrand <redacted> -- Cheers, David / dhildenb