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| author | Yang Shi <yang.shi@linux.alibaba.com> | 2020-08-12 04:31:48 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-08-12 20:57:57 +0300 |
| commit | 4958e4d86ecb011a81f5d80ce2023ef9f10692d8 (patch) | |
| tree | 1c962608c56d83ce1d58188cfe1091f303565182 | |
| parent | b0fc0f3fca80cf8ea8631eaec6b922bca4c4c2dd (diff) | |
| download | linux-4958e4d86ecb011a81f5d80ce2023ef9f10692d8.tar.xz | |
mm: thp: remove debug_cow switch
Since commit 3917c80280c93a7123f ("thp: change CoW semantics for
anon-THP"), the CoW page fault of THP has been rewritten, debug_cow is not
used anymore. So, just remove it.
Signed-off-by: Yang Shi <yang.shi@linux.alibaba.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Zi Yan <ziy@nvidia.com>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Link: http://lkml.kernel.org/r/1592270980-116062-1-git-send-email-yang.shi@linux.alibaba.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | include/linux/huge_mm.h | 7 | ||||
| -rw-r--r-- | mm/huge_memory.c | 21 |
2 files changed, 0 insertions, 28 deletions
diff --git a/include/linux/huge_mm.h b/include/linux/huge_mm.h index 17c4c4975145..467302056e17 100644 --- a/include/linux/huge_mm.h +++ b/include/linux/huge_mm.h @@ -181,13 +181,6 @@ static inline bool transhuge_vma_suitable(struct vm_area_struct *vma, #define transparent_hugepage_use_zero_page() \ (transparent_hugepage_flags & \ (1<<TRANSPARENT_HUGEPAGE_USE_ZERO_PAGE_FLAG)) -#ifdef CONFIG_DEBUG_VM -#define transparent_hugepage_debug_cow() \ - (transparent_hugepage_flags & \ - (1<<TRANSPARENT_HUGEPAGE_DEBUG_COW_FLAG)) -#else /* CONFIG_DEBUG_VM */ -#define transparent_hugepage_debug_cow() 0 -#endif /* CONFIG_DEBUG_VM */ extern unsigned long thp_get_unmapped_area(struct file *filp, unsigned long addr, unsigned long len, unsigned long pgoff, diff --git a/mm/huge_memory.c b/mm/huge_memory.c index 863c495776d7..2ccff8472cd4 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -303,24 +303,6 @@ static ssize_t hpage_pmd_size_show(struct kobject *kobj, static struct kobj_attribute hpage_pmd_size_attr = __ATTR_RO(hpage_pmd_size); -#ifdef CONFIG_DEBUG_VM -static ssize_t debug_cow_show(struct kobject *kobj, - struct kobj_attribute *attr, char *buf) -{ - return single_hugepage_flag_show(kobj, attr, buf, - TRANSPARENT_HUGEPAGE_DEBUG_COW_FLAG); -} -static ssize_t debug_cow_store(struct kobject *kobj, - struct kobj_attribute *attr, - const char *buf, size_t count) -{ - return single_hugepage_flag_store(kobj, attr, buf, count, - TRANSPARENT_HUGEPAGE_DEBUG_COW_FLAG); -} -static struct kobj_attribute debug_cow_attr = - __ATTR(debug_cow, 0644, debug_cow_show, debug_cow_store); -#endif /* CONFIG_DEBUG_VM */ - static struct attribute *hugepage_attr[] = { &enabled_attr.attr, &defrag_attr.attr, @@ -329,9 +311,6 @@ static struct attribute *hugepage_attr[] = { #ifdef CONFIG_SHMEM &shmem_enabled_attr.attr, #endif -#ifdef CONFIG_DEBUG_VM - &debug_cow_attr.attr, -#endif NULL, }; |