Re: [PATCH v2 19/37] mm/gup: remove record_subpages()
From: David Hildenbrand <hidden>
Date: 2025-09-06 07:01:02
Also in:
dri-devel, intel-gfx, io-uring, kvm, linux-arm-kernel, linux-crypto, linux-ide, linux-iommu, linux-kselftest, linux-mips, linux-mm, linux-mmc, linux-riscv, linux-s390, linux-scsi, lkml, virtualization
quoted hunk ↗ jump to hunk
pmdp = pmd_offset_lockless(pudp, pud, addr);@@ -3046,23 +3041,21 @@ static int gup_fast_pmd_range(pud_t *pudp, pud_t pud, unsigned long addr, next = pmd_addr_end(addr, end); if (!pmd_present(pmd)) - return 0; + break; - if (unlikely(pmd_leaf(pmd))) { - /* See gup_fast_pte_range() */ - if (pmd_protnone(pmd)) - return 0; + if (unlikely(pmd_leaf(pmd))) + cur_nr_pages = gup_fast_pmd_leaf(pmd, pmdp, addr, next, flags, pages); + else + cur_nr_pages = gup_fast_pte_range(pmd, pmdp, addr, next, flags, pages); - if (!gup_fast_pmd_leaf(pmd, pmdp, addr, next, flags, - pages, nr)) - return 0; + nr_pages += cur_nr_pages; + pages += cur_nr_pages; - } else if (!gup_fast_pte_range(pmd, pmdp, addr, next, flags, - pages, nr)) - return 0; + if (nr_pages != (next - addr) >> PAGE_SIZE) + break;
^ cur_nr_pages. Open for suggestions on how to make that thing here even better. -- Cheers David / dhildenb