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| author | Baolin Wang <baolin.wang@linux.alibaba.com> | 2024-03-29 07:56:45 +0100 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2024-04-26 05:56:30 +0200 |
| commit | 6b0ed7b3c77547d2308983a26db11a0d14a60ace (patch) | |
| tree | 47184176a69633f8bd736ce4cb8f5ac22745696e /mm/memory.c | |
| parent | mm: alloc_anon_folio: avoid doing vma_thp_gfp_mask in fallback cases (diff) | |
| download | linux-6b0ed7b3c77547d2308983a26db11a0d14a60ace.tar.xz linux-6b0ed7b3c77547d2308983a26db11a0d14a60ace.zip | |
mm: factor out the numa mapping rebuilding into a new helper
Patch series "support multi-size THP numa balancing", v2.
This patchset tries to support mTHP numa balancing, as a simple solution
to start, the NUMA balancing algorithm for mTHP will follow the THP
strategy as the basic support. Please find details in each patch.
This patch (of 2):
To support large folio's numa balancing, factor out the numa mapping
rebuilding into a new helper as a preparation.
Link: https://lkml.kernel.org/r/cover.1712132950.git.baolin.wang@linux.alibaba.com
Link: https://lkml.kernel.org/r/cover.1711683069.git.baolin.wang@linux.alibaba.com
Link: https://lkml.kernel.org/r/8bc2586bdd8dbbe6d83c09b77b360ec8fcac3736.1711683069.git.baolin.wang@linux.alibaba.com
Signed-off-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Reviewed-by: "Huang, Ying" <ying.huang@intel.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: Kefeng Wang <wangkefeng.wang@huawei.com>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to '')
| -rw-r--r-- | mm/memory.c | 22 |
1 files changed, 15 insertions, 7 deletions
diff --git a/mm/memory.c b/mm/memory.c index 93eaeaf5ca9d..77c69bf297ee 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -5063,6 +5063,20 @@ int numa_migrate_prep(struct folio *folio, struct vm_fault *vmf, return mpol_misplaced(folio, vmf, addr); } +static void numa_rebuild_single_mapping(struct vm_fault *vmf, struct vm_area_struct *vma, + bool writable) +{ + pte_t pte, old_pte; + + old_pte = ptep_modify_prot_start(vma, vmf->address, vmf->pte); + pte = pte_modify(old_pte, vma->vm_page_prot); + pte = pte_mkyoung(pte); + if (writable) + pte = pte_mkwrite(pte, vma); + ptep_modify_prot_commit(vma, vmf->address, vmf->pte, old_pte, pte); + update_mmu_cache_range(vmf, vma, vmf->address, vmf->pte, 1); +} + static vm_fault_t do_numa_page(struct vm_fault *vmf) { struct vm_area_struct *vma = vmf->vma; @@ -5168,13 +5182,7 @@ out_map: * Make it present again, depending on how arch implements * non-accessible ptes, some can allow access by kernel mode. */ - old_pte = ptep_modify_prot_start(vma, vmf->address, vmf->pte); - pte = pte_modify(old_pte, vma->vm_page_prot); - pte = pte_mkyoung(pte); - if (writable) - pte = pte_mkwrite(pte, vma); - ptep_modify_prot_commit(vma, vmf->address, vmf->pte, old_pte, pte); - update_mmu_cache_range(vmf, vma, vmf->address, vmf->pte, 1); + numa_rebuild_single_mapping(vmf, vma, writable); pte_unmap_unlock(vmf->pte, vmf->ptl); goto out; } |