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Wed, 19 Aug 2020 13:01:42 +0000 (GMT) From: "Aneesh Kumar K.V" To: linux-mm@kvack.org, akpm@linux-foundation.org Cc: mpe@ellerman.id.au, linuxppc-dev@lists.ozlabs.org, Anshuman Khandual , "Aneesh Kumar K.V" Subject: [PATCH v2 08/13] mm/debug_vm_pgtable/thp: Use page table depost/withdraw with THP Date: Wed, 19 Aug 2020 18:31:02 +0530 Message-Id: <20200819130107.478414-9-aneesh.kumar@linux.ibm.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200819130107.478414-1-aneesh.kumar@linux.ibm.com> References: <20200819130107.478414-1-aneesh.kumar@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.235,18.0.687 definitions=2020-08-19_04:2020-08-19,2020-08-19 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxscore=0 mlxlogscore=999 suspectscore=0 impostorscore=0 lowpriorityscore=0 spamscore=0 malwarescore=0 clxscore=1015 phishscore=0 priorityscore=1501 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2006250000 definitions=main-2008190110 X-Rspamd-Queue-Id: 81133180ACEEC X-Spamd-Result: default: False [0.00 / 100.00] X-Rspamd-Server: rspam03 Content-Transfer-Encoding: quoted-printable X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Architectures like ppc64 use deposited page table while updating the huge= pte entries. Signed-off-by: Aneesh Kumar K.V --- mm/debug_vm_pgtable.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/mm/debug_vm_pgtable.c b/mm/debug_vm_pgtable.c index 9c7e2c9cfc76..6dcac2b40fef 100644 --- a/mm/debug_vm_pgtable.c +++ b/mm/debug_vm_pgtable.c @@ -149,7 +149,7 @@ static void __init pmd_basic_tests(unsigned long pfn,= pgprot_t prot) static void __init pmd_advanced_tests(struct mm_struct *mm, struct vm_area_struct *vma, pmd_t *pmdp, unsigned long pfn, unsigned long vaddr, - pgprot_t prot) + pgprot_t prot, pgtable_t pgtable) { pmd_t pmd; =20 @@ -160,6 +160,8 @@ static void __init pmd_advanced_tests(struct mm_struc= t *mm, /* Align the address wrt HPAGE_PMD_SIZE */ vaddr =3D (vaddr & HPAGE_PMD_MASK) + HPAGE_PMD_SIZE; =20 + pgtable_trans_huge_deposit(mm, pmdp, pgtable); + pmd =3D pmd_mkhuge(pfn_pmd(pfn, prot)); set_pmd_at(mm, vaddr, pmdp, pmd); pmdp_set_wrprotect(mm, vaddr, pmdp); @@ -188,6 +190,8 @@ static void __init pmd_advanced_tests(struct mm_struc= t *mm, pmdp_test_and_clear_young(vma, vaddr, pmdp); pmd =3D READ_ONCE(*pmdp); WARN_ON(pmd_young(pmd)); + + pgtable =3D pgtable_trans_huge_withdraw(mm, pmdp); } =20 static void __init pmd_leaf_tests(unsigned long pfn, pgprot_t prot) @@ -1000,7 +1004,7 @@ static int __init debug_vm_pgtable(void) pgd_clear_tests(mm, pgdp); =20 pte_advanced_tests(mm, vma, ptep, pte_aligned, vaddr, prot); - pmd_advanced_tests(mm, vma, pmdp, pmd_aligned, vaddr, prot); + pmd_advanced_tests(mm, vma, pmdp, pmd_aligned, vaddr, prot, saved_ptep)= ; pud_advanced_tests(mm, vma, pudp, pud_aligned, vaddr, prot); hugetlb_advanced_tests(mm, vma, ptep, pte_aligned, vaddr, prot); =20 --=20 2.26.2