| Message ID | d3d60680508486ecb48ae639cfd3911009275710.1652411252.git.baolin.wang@linux.alibaba.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | Implement arm64 specific huge_ptep_get() | expand |
On 5/13/22 09:07, Baolin Wang wrote: > The original huge_ptep_get() on ARM64 is just a wrapper of ptep_get(), Right, as arm64 does not enable __HAVE_ARCH_HUGE_PTEP_GET. > which will not take into account any contig-PTEs dirty and access bits. As expected being operating on a single table entry. > Meanwhile we will implement a new ARM64-specific huge_ptep_get() > interface in following patch, which will take into account any contig-PTEs > dirty and access bits. To keep the same efficient logics to get the pte s/logics/logic > value, change to use ptep_get() as a preparation. > > Signed-off-by: Baolin Wang <baolin.wang@linux.alibaba.com> > Reviewed-by: Muchun Song <songmuchun@bytedance.com> LGTM Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com> > --- > arch/arm64/mm/hugetlbpage.c | 8 ++++---- > 1 file changed, 4 insertions(+), 4 deletions(-) > > diff --git a/arch/arm64/mm/hugetlbpage.c b/arch/arm64/mm/hugetlbpage.c > index 30f5b76..9553851 100644 > --- a/arch/arm64/mm/hugetlbpage.c > +++ b/arch/arm64/mm/hugetlbpage.c > @@ -172,7 +172,7 @@ static pte_t get_clear_contig(struct mm_struct *mm, > unsigned long pgsize, > unsigned long ncontig) > { > - pte_t orig_pte = huge_ptep_get(ptep); > + pte_t orig_pte = ptep_get(ptep); > unsigned long i; > > for (i = 0; i < ncontig; i++, addr += pgsize, ptep++) { > @@ -379,7 +379,7 @@ pte_t huge_ptep_get_and_clear(struct mm_struct *mm, > { > int ncontig; > size_t pgsize; > - pte_t orig_pte = huge_ptep_get(ptep); > + pte_t orig_pte = ptep_get(ptep); > > if (!pte_cont(orig_pte)) > return ptep_get_and_clear(mm, addr, ptep); > @@ -402,11 +402,11 @@ static int __cont_access_flags_changed(pte_t *ptep, pte_t pte, int ncontig) > { > int i; > > - if (pte_write(pte) != pte_write(huge_ptep_get(ptep))) > + if (pte_write(pte) != pte_write(ptep_get(ptep))) > return 1; > > for (i = 0; i < ncontig; i++) { > - pte_t orig_pte = huge_ptep_get(ptep + i); > + pte_t orig_pte = ptep_get(ptep + i); > > if (pte_dirty(pte) != pte_dirty(orig_pte)) > return 1;
On 5/13/2022 6:50 PM, Anshuman Khandual wrote: > > > On 5/13/22 09:07, Baolin Wang wrote: >> The original huge_ptep_get() on ARM64 is just a wrapper of ptep_get(), > > Right, as arm64 does not enable __HAVE_ARCH_HUGE_PTEP_GET. > >> which will not take into account any contig-PTEs dirty and access bits. > > As expected being operating on a single table entry. > >> Meanwhile we will implement a new ARM64-specific huge_ptep_get() >> interface in following patch, which will take into account any contig-PTEs >> dirty and access bits. To keep the same efficient logics to get the pte > > s/logics/logic Will fix. > >> value, change to use ptep_get() as a preparation. >> >> Signed-off-by: Baolin Wang <baolin.wang@linux.alibaba.com> >> Reviewed-by: Muchun Song <songmuchun@bytedance.com> > > LGTM > > Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com> Thanks.
diff --git a/arch/arm64/mm/hugetlbpage.c b/arch/arm64/mm/hugetlbpage.c index 30f5b76..9553851 100644 --- a/arch/arm64/mm/hugetlbpage.c +++ b/arch/arm64/mm/hugetlbpage.c @@ -172,7 +172,7 @@ static pte_t get_clear_contig(struct mm_struct *mm, unsigned long pgsize, unsigned long ncontig) { - pte_t orig_pte = huge_ptep_get(ptep); + pte_t orig_pte = ptep_get(ptep); unsigned long i; for (i = 0; i < ncontig; i++, addr += pgsize, ptep++) { @@ -379,7 +379,7 @@ pte_t huge_ptep_get_and_clear(struct mm_struct *mm, { int ncontig; size_t pgsize; - pte_t orig_pte = huge_ptep_get(ptep); + pte_t orig_pte = ptep_get(ptep); if (!pte_cont(orig_pte)) return ptep_get_and_clear(mm, addr, ptep); @@ -402,11 +402,11 @@ static int __cont_access_flags_changed(pte_t *ptep, pte_t pte, int ncontig) { int i; - if (pte_write(pte) != pte_write(huge_ptep_get(ptep))) + if (pte_write(pte) != pte_write(ptep_get(ptep))) return 1; for (i = 0; i < ncontig; i++) { - pte_t orig_pte = huge_ptep_get(ptep + i); + pte_t orig_pte = ptep_get(ptep + i); if (pte_dirty(pte) != pte_dirty(orig_pte)) return 1;