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mm: factor out the numa mapping rebuilding into a new helper

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BugLink: https://bugs.launchpad.net/bugs/2076866

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>

(cherry picked from commit 6b0ed7b3c77547d2308983a26db11a0d14a60ace)
Signed-off-by: Frank Heimes <frank.heimes@canonical.com>
Acked-by: Stefan Bader <stefan.bader@canonical.com>
Acked-by: Mehmet Basaran <mehmet.basaran@canonical.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>
This commit is contained in:
Baolin Wang
2024-03-29 14:56:45 +08:00
committed by Stefan Bader
parent 397b754db9
commit edaf2229fd
1 changed files with 15 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files
mm/memory.c
+15 -7
View File
@@ -4920,6 +4920,20 @@ 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;
@@ -5025,13 +5039,7 @@ 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;
}