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Wed, 12 Aug 2020 06:34:28 +0000 (GMT) From: "Aneesh Kumar K.V" To: linux-mm@kvack.org, akpm@linux-foundation.org Subject: [PATCH 05/16] debug_vm_pgtable/savedwrite: Enable savedwrite test with CONFIG_NUMA_BALANCING Date: Wed, 12 Aug 2020 12:03:47 +0530 Message-Id: <20200812063358.369514-5-aneesh.kumar@linux.ibm.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200812063358.369514-1-aneesh.kumar@linux.ibm.com> References: <20200812063358.369514-1-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=2020-08-11_19:2020-08-11, 2020-08-11 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxscore=0 adultscore=0 impostorscore=0 phishscore=0 mlxlogscore=862 lowpriorityscore=0 bulkscore=0 spamscore=0 malwarescore=0 suspectscore=0 clxscore=1015 priorityscore=1501 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2006250000 definitions=main-2008120047 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linuxppc-dev@lists.ozlabs.org, "Aneesh Kumar K.V" , Anshuman Khandual Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" Saved write support was added to track the write bit of a pte after marking the pte protnone. This was done so that AUTONUMA can convert a write pte to protnone and still track the old write bit. When converting it back we set the pte write bit correctly thereby avoiding a write fault again. Hence enable the test only when CONFIG_NUMA_BALANCING is enabled. Signed-off-by: Aneesh Kumar K.V --- mm/debug_vm_pgtable.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/mm/debug_vm_pgtable.c b/mm/debug_vm_pgtable.c index 679bb3d289a3..de8a62d0a931 100644 --- a/mm/debug_vm_pgtable.c +++ b/mm/debug_vm_pgtable.c @@ -110,6 +110,7 @@ static void __init pte_advanced_tests(struct mm_struct *mm, WARN_ON(pte_young(pte)); } +#ifdef CONFIG_NUMA_BALANCING static void __init pte_savedwrite_tests(unsigned long pfn, pgprot_t prot) { pte_t pte = pfn_pte(pfn, prot); @@ -118,6 +119,8 @@ static void __init pte_savedwrite_tests(unsigned long pfn, pgprot_t prot) WARN_ON(!pte_savedwrite(pte_mk_savedwrite(pte_clear_savedwrite(pte)))); WARN_ON(pte_savedwrite(pte_clear_savedwrite(pte_mk_savedwrite(pte)))); } +#endif + #ifdef CONFIG_TRANSPARENT_HUGEPAGE static void __init pmd_basic_tests(unsigned long pfn, pgprot_t prot) { @@ -221,6 +224,7 @@ static void __init pmd_huge_tests(pmd_t *pmdp, unsigned long pfn, pgprot_t prot) WARN_ON(!pmd_none(pmd)); } +#ifdef CONFIG_NUMA_BALANCING static void __init pmd_savedwrite_tests(unsigned long pfn, pgprot_t prot) { pmd_t pmd = pfn_pmd(pfn, prot); @@ -229,6 +233,7 @@ static void __init pmd_savedwrite_tests(unsigned long pfn, pgprot_t prot) WARN_ON(!pmd_savedwrite(pmd_mk_savedwrite(pmd_clear_savedwrite(pmd)))); WARN_ON(pmd_savedwrite(pmd_clear_savedwrite(pmd_mk_savedwrite(pmd)))); } +#endif #ifdef CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD static void __init pud_basic_tests(unsigned long pfn, pgprot_t prot) @@ -1005,8 +1010,10 @@ static int __init debug_vm_pgtable(void) pmd_huge_tests(pmdp, pmd_aligned, prot); pud_huge_tests(pudp, pud_aligned, prot); +#ifdef CONFIG_NUMA_BALANCING pte_savedwrite_tests(pte_aligned, prot); pmd_savedwrite_tests(pmd_aligned, prot); +#endif pte_unmap_unlock(ptep, ptl);