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[67.174.241.145]) by smtp.gmail.com with ESMTPSA id v17-20020a1709028d9100b0015e8d4eb1d4sm58898plo.30.2022.05.10.13.32.45 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 10 May 2022 13:32:46 -0700 (PDT) From: Yang Shi To: vbabka@suse.cz, kirill.shutemov@linux.intel.com, linmiaohe@huawei.com, songliubraving@fb.com, riel@surriel.com, willy@infradead.org, ziy@nvidia.com, tytso@mit.edu, akpm@linux-foundation.org Cc: shy828301@gmail.com, linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [v4 PATCH 6/8] mm: khugepaged: make hugepage_vma_check() non-static Date: Tue, 10 May 2022 13:32:20 -0700 Message-Id: <20220510203222.24246-7-shy828301@gmail.com> X-Mailer: git-send-email 2.26.3 In-Reply-To: <20220510203222.24246-1-shy828301@gmail.com> References: <20220510203222.24246-1-shy828301@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org The hugepage_vma_check() could be reused by khugepaged_enter() and khugepaged_enter_vma_merge(), but it is static in khugepaged.c. Make it non-static and declare it in khugepaged.h. Suggested-by: Vlastimil Babka Signed-off-by: Yang Shi --- include/linux/khugepaged.h | 14 ++++++-------- mm/khugepaged.c | 25 +++++++++---------------- 2 files changed, 15 insertions(+), 24 deletions(-) diff --git a/include/linux/khugepaged.h b/include/linux/khugepaged.h index 0423d3619f26..c340f6bb39d6 100644 --- a/include/linux/khugepaged.h +++ b/include/linux/khugepaged.h @@ -3,8 +3,6 @@ #define _LINUX_KHUGEPAGED_H #include /* MMF_VM_HUGEPAGE */ -#include - #ifdef CONFIG_TRANSPARENT_HUGEPAGE extern struct attribute_group khugepaged_attr_group; @@ -12,6 +10,8 @@ extern struct attribute_group khugepaged_attr_group; extern int khugepaged_init(void); extern void khugepaged_destroy(void); extern int start_stop_khugepaged(void); +extern bool hugepage_vma_check(struct vm_area_struct *vma, + unsigned long vm_flags); extern void __khugepaged_enter(struct mm_struct *mm); extern void __khugepaged_exit(struct mm_struct *mm); extern void khugepaged_enter_vma_merge(struct vm_area_struct *vma, @@ -55,13 +55,11 @@ static inline void khugepaged_exit(struct mm_struct *mm) static inline void khugepaged_enter(struct vm_area_struct *vma, unsigned long vm_flags) { - if (!test_bit(MMF_VM_HUGEPAGE, &vma->vm_mm->flags)) - if ((khugepaged_always() || - (shmem_file(vma->vm_file) && shmem_huge_enabled(vma)) || - (khugepaged_req_madv() && (vm_flags & VM_HUGEPAGE))) && - !(vm_flags & VM_NOHUGEPAGE) && - !test_bit(MMF_DISABLE_THP, &vma->vm_mm->flags)) + if (!test_bit(MMF_VM_HUGEPAGE, &vma->vm_mm->flags) && + khugepaged_enabled()) { + if (hugepage_vma_check(vma, vm_flags)) __khugepaged_enter(vma->vm_mm); + } } #else /* CONFIG_TRANSPARENT_HUGEPAGE */ static inline void khugepaged_fork(struct mm_struct *mm, struct mm_struct *oldmm) diff --git a/mm/khugepaged.c b/mm/khugepaged.c index 7815218ab960..dec449339964 100644 --- a/mm/khugepaged.c +++ b/mm/khugepaged.c @@ -437,8 +437,8 @@ static inline int khugepaged_test_exit(struct mm_struct *mm) return atomic_read(&mm->mm_users) == 0; } -static bool hugepage_vma_check(struct vm_area_struct *vma, - unsigned long vm_flags) +bool hugepage_vma_check(struct vm_area_struct *vma, + unsigned long vm_flags) { if (!transhuge_vma_enabled(vma, vm_flags)) return false; @@ -508,20 +508,13 @@ void __khugepaged_enter(struct mm_struct *mm) void khugepaged_enter_vma_merge(struct vm_area_struct *vma, unsigned long vm_flags) { - unsigned long hstart, hend; - - /* - * khugepaged only supports read-only files for non-shmem files. - * khugepaged does not yet work on special mappings. And - * file-private shmem THP is not supported. - */ - if (!hugepage_vma_check(vma, vm_flags)) - return; - - hstart = (vma->vm_start + ~HPAGE_PMD_MASK) & HPAGE_PMD_MASK; - hend = vma->vm_end & HPAGE_PMD_MASK; - if (hstart < hend) - khugepaged_enter(vma, vm_flags); + if (!test_bit(MMF_VM_HUGEPAGE, &vma->vm_mm->flags) && + khugepaged_enabled() && + (((vma->vm_start + ~HPAGE_PMD_MASK) & HPAGE_PMD_MASK) < + (vma->vm_end & HPAGE_PMD_MASK))) { + if (hugepage_vma_check(vma, vm_flags)) + __khugepaged_enter(vma->vm_mm); + } } void __khugepaged_exit(struct mm_struct *mm) -- 2.26.3