diff options
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/huge_memory.c | 101 | ||||
| -rw-r--r-- | mm/page_alloc.c | 8 | ||||
| -rw-r--r-- | mm/slab.c | 8 | ||||
| -rw-r--r-- | mm/slub.c | 2 |
4 files changed, 71 insertions, 48 deletions
diff --git a/mm/huge_memory.c b/mm/huge_memory.c index 1dddfb2..e08b165 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -78,7 +78,7 @@ unsigned long transparent_hugepage_flags __read_mostly = #ifdef CONFIG_TRANSPARENT_HUGEPAGE_MADVISE (1<<TRANSPARENT_HUGEPAGE_REQ_MADV_FLAG)| #endif - (1<<TRANSPARENT_HUGEPAGE_DEFRAG_FLAG)| + (1<<TRANSPARENT_HUGEPAGE_DEFRAG_REQ_MADV_FLAG)| (1<<TRANSPARENT_HUGEPAGE_DEFRAG_KHUGEPAGED_FLAG)| (1<<TRANSPARENT_HUGEPAGE_USE_ZERO_PAGE_FLAG); @@ -270,37 +270,35 @@ static struct shrinker huge_zero_page_shrinker = { #ifdef CONFIG_SYSFS -static ssize_t double_flag_show(struct kobject *kobj, - struct kobj_attribute *attr, char *buf, - enum transparent_hugepage_flag enabled, - enum transparent_hugepage_flag req_madv) -{ - if (test_bit(enabled, &transparent_hugepage_flags)) { - VM_BUG_ON(test_bit(req_madv, &transparent_hugepage_flags)); - return sprintf(buf, "[always] madvise never\n"); - } else if (test_bit(req_madv, &transparent_hugepage_flags)) - return sprintf(buf, "always [madvise] never\n"); - else - return sprintf(buf, "always madvise [never]\n"); -} -static ssize_t double_flag_store(struct kobject *kobj, +static ssize_t triple_flag_store(struct kobject *kobj, struct kobj_attribute *attr, const char *buf, size_t count, enum transparent_hugepage_flag enabled, + enum transparent_hugepage_flag deferred, enum transparent_hugepage_flag req_madv) { - if (!memcmp("always", buf, + if (!memcmp("defer", buf, + min(sizeof("defer")-1, count))) { + if (enabled == deferred) + return -EINVAL; + clear_bit(enabled, &transparent_hugepage_flags); + clear_bit(req_madv, &transparent_hugepage_flags); + set_bit(deferred, &transparent_hugepage_flags); + } else if (!memcmp("always", buf, min(sizeof("always")-1, count))) { - set_bit(enabled, &transparent_hugepage_flags); + clear_bit(deferred, &transparent_hugepage_flags); clear_bit(req_madv, &transparent_hugepage_flags); + set_bit(enabled, &transparent_hugepage_flags); } else if (!memcmp("madvise", buf, min(sizeof("madvise")-1, count))) { clear_bit(enabled, &transparent_hugepage_flags); + clear_bit(deferred, &transparent_hugepage_flags); set_bit(req_madv, &transparent_hugepage_flags); } else if (!memcmp("never", buf, min(sizeof("never")-1, count))) { clear_bit(enabled, &transparent_hugepage_flags); clear_bit(req_madv, &transparent_hugepage_flags); + clear_bit(deferred, &transparent_hugepage_flags); } else return -EINVAL; @@ -310,17 +308,22 @@ static ssize_t double_flag_store(struct kobject *kobj, static ssize_t enabled_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf) { - return double_flag_show(kobj, attr, buf, - TRANSPARENT_HUGEPAGE_FLAG, - TRANSPARENT_HUGEPAGE_REQ_MADV_FLAG); + if (test_bit(TRANSPARENT_HUGEPAGE_FLAG, &transparent_hugepage_flags)) + return sprintf(buf, "[always] madvise never\n"); + else if (test_bit(TRANSPARENT_HUGEPAGE_REQ_MADV_FLAG, &transparent_hugepage_flags)) + return sprintf(buf, "always [madvise] never\n"); + else + return sprintf(buf, "always madvise [never]\n"); } + static ssize_t enabled_store(struct kobject *kobj, struct kobj_attribute *attr, const char *buf, size_t count) { ssize_t ret; - ret = double_flag_store(kobj, attr, buf, count, + ret = triple_flag_store(kobj, attr, buf, count, + TRANSPARENT_HUGEPAGE_FLAG, TRANSPARENT_HUGEPAGE_FLAG, TRANSPARENT_HUGEPAGE_REQ_MADV_FLAG); @@ -378,16 +381,23 @@ static ssize_t single_flag_store(struct kobject *kobj, static ssize_t defrag_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf) { - return double_flag_show(kobj, attr, buf, - TRANSPARENT_HUGEPAGE_DEFRAG_FLAG, - TRANSPARENT_HUGEPAGE_DEFRAG_REQ_MADV_FLAG); + if (test_bit(TRANSPARENT_HUGEPAGE_DEFRAG_DIRECT_FLAG, &transparent_hugepage_flags)) + return sprintf(buf, "[always] defer madvise never\n"); + if (test_bit(TRANSPARENT_HUGEPAGE_DEFRAG_KSWAPD_FLAG, &transparent_hugepage_flags)) + return sprintf(buf, "always [defer] madvise never\n"); + else if (test_bit(TRANSPARENT_HUGEPAGE_DEFRAG_REQ_MADV_FLAG, &transparent_hugepage_flags)) + return sprintf(buf, "always defer [madvise] never\n"); + else + return sprintf(buf, "always defer madvise [never]\n"); + } static ssize_t defrag_store(struct kobject *kobj, struct kobj_attribute *attr, const char *buf, size_t count) { - return double_flag_store(kobj, attr, buf, count, - TRANSPARENT_HUGEPAGE_DEFRAG_FLAG, + return triple_flag_store(kobj, attr, buf, count, + TRANSPARENT_HUGEPAGE_DEFRAG_DIRECT_FLAG, + TRANSPARENT_HUGEPAGE_DEFRAG_KSWAPD_FLAG, TRANSPARENT_HUGEPAGE_DEFRAG_REQ_MADV_FLAG); } static struct kobj_attribute defrag_attr = @@ -843,9 +853,30 @@ static int __do_huge_pmd_anonymous_page(struct mm_struct *mm, return 0; } -static inline gfp_t alloc_hugepage_gfpmask(int defrag, gfp_t extra_gfp) +/* + * If THP is set to always then directly reclaim/compact as necessary + * If set to defer then do no reclaim and defer to khugepaged + * If set to madvise and the VMA is flagged then directly reclaim/compact + */ +static inline gfp_t alloc_hugepage_direct_gfpmask(struct vm_area_struct *vma) +{ + gfp_t reclaim_flags = 0; + + if (test_bit(TRANSPARENT_HUGEPAGE_DEFRAG_REQ_MADV_FLAG, &transparent_hugepage_flags) && + (vma->vm_flags & VM_HUGEPAGE)) + reclaim_flags = __GFP_DIRECT_RECLAIM; + else if (test_bit(TRANSPARENT_HUGEPAGE_DEFRAG_KSWAPD_FLAG, &transparent_hugepage_flags)) + reclaim_flags = __GFP_KSWAPD_RECLAIM; + else if (test_bit(TRANSPARENT_HUGEPAGE_DEFRAG_DIRECT_FLAG, &transparent_hugepage_flags)) + reclaim_flags = __GFP_DIRECT_RECLAIM; + + return GFP_TRANSHUGE | reclaim_flags; +} + +/* Defrag for khugepaged will enter direct reclaim/compaction if necessary */ +static inline gfp_t alloc_hugepage_khugepaged_gfpmask(void) { - return (GFP_TRANSHUGE & ~(defrag ? 0 : __GFP_RECLAIM)) | extra_gfp; + return GFP_TRANSHUGE | (khugepaged_defrag() ? __GFP_DIRECT_RECLAIM : 0); } /* Caller must hold page table lock. */ @@ -919,7 +950,7 @@ int do_huge_pmd_anonymous_page(struct mm_struct *mm, struct vm_area_struct *vma, } return ret; } - gfp = alloc_hugepage_gfpmask(transparent_hugepage_defrag(vma), 0); + gfp = alloc_hugepage_direct_gfpmask(vma); page = alloc_hugepage_vma(gfp, vma, haddr, HPAGE_PMD_ORDER); if (unlikely(!page)) { count_vm_event(THP_FAULT_FALLBACK); @@ -1279,7 +1310,7 @@ int do_huge_pmd_wp_page(struct mm_struct *mm, struct vm_area_struct *vma, alloc: if (transparent_hugepage_enabled(vma) && !transparent_hugepage_debug_cow()) { - huge_gfp = alloc_hugepage_gfpmask(transparent_hugepage_defrag(vma), 0); + huge_gfp = alloc_hugepage_direct_gfpmask(vma); new_page = alloc_hugepage_vma(huge_gfp, vma, haddr, HPAGE_PMD_ORDER); } else new_page = NULL; @@ -2249,11 +2280,12 @@ static int khugepaged_find_target_node(void) return 0; } -static inline struct page *alloc_hugepage(int defrag) +static inline struct page *alloc_khugepaged_hugepage(void) { struct page *page; - page = alloc_pages(alloc_hugepage_gfpmask(defrag, 0), HPAGE_PMD_ORDER); + page = alloc_pages(alloc_hugepage_khugepaged_gfpmask(), + HPAGE_PMD_ORDER); if (page) prep_transhuge_page(page); return page; @@ -2264,7 +2296,7 @@ static struct page *khugepaged_alloc_hugepage(bool *wait) struct page *hpage; do { - hpage = alloc_hugepage(khugepaged_defrag()); + hpage = alloc_khugepaged_hugepage(); if (!hpage) { count_vm_event(THP_COLLAPSE_ALLOC_FAILED); if (!*wait) @@ -2335,8 +2367,7 @@ static void collapse_huge_page(struct mm_struct *mm, VM_BUG_ON(address & ~HPAGE_PMD_MASK); /* Only allocate from the target node */ - gfp = alloc_hugepage_gfpmask(khugepaged_defrag(), __GFP_OTHER_NODE) | - __GFP_THISNODE; + gfp = alloc_hugepage_khugepaged_gfpmask() | __GFP_OTHER_NODE | __GFP_THISNODE; /* release the mmap_sem read lock. */ new_page = khugepaged_alloc_page(hpage, gfp, mm, address, node); diff --git a/mm/page_alloc.c b/mm/page_alloc.c index d156310..096a00d 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -3119,14 +3119,6 @@ __alloc_pages_slowpath(gfp_t gfp_mask, unsigned int order, (__GFP_ATOMIC|__GFP_DIRECT_RECLAIM))) gfp_mask &= ~__GFP_ATOMIC; - /* - * If this allocation cannot block and it is for a specific node, then - * fail early. There's no need to wakeup kswapd or retry for a - * speculative node-specific allocation. - */ - if (IS_ENABLED(CONFIG_NUMA) && (gfp_mask & __GFP_THISNODE) && !can_direct_reclaim) - goto nopage; - retry: if (gfp_mask & __GFP_KSWAPD_RECLAIM) wake_all_kswapds(order, ac); @@ -670,7 +670,7 @@ static inline void *____cache_alloc_node(struct kmem_cache *cachep, static inline gfp_t gfp_exact_node(gfp_t flags) { - return flags; + return flags & ~__GFP_NOFAIL; } #else /* CONFIG_NUMA */ @@ -841,12 +841,12 @@ static inline int cache_free_alien(struct kmem_cache *cachep, void *objp) } /* - * Construct gfp mask to allocate from a specific node but do not direct reclaim - * or warn about failures. kswapd may still wake to reclaim in the background. + * Construct gfp mask to allocate from a specific node but do not reclaim or + * warn about failures. */ static inline gfp_t gfp_exact_node(gfp_t flags) { - return (flags | __GFP_THISNODE | __GFP_NOWARN) & ~__GFP_DIRECT_RECLAIM; + return (flags | __GFP_THISNODE | __GFP_NOWARN) & ~(__GFP_RECLAIM|__GFP_NOFAIL); } #endif @@ -1426,7 +1426,7 @@ static struct page *allocate_slab(struct kmem_cache *s, gfp_t flags, int node) */ alloc_gfp = (flags | __GFP_NOWARN | __GFP_NORETRY) & ~__GFP_NOFAIL; if ((alloc_gfp & __GFP_DIRECT_RECLAIM) && oo_order(oo) > oo_order(s->min)) - alloc_gfp = (alloc_gfp | __GFP_NOMEMALLOC) & ~__GFP_DIRECT_RECLAIM; + alloc_gfp = (alloc_gfp | __GFP_NOMEMALLOC) & ~(__GFP_RECLAIM|__GFP_NOFAIL); page = alloc_slab_page(s, alloc_gfp, node, oo); if (unlikely(!page)) { |
