Patch series "mm/migration: Add trace events", v3. This adds trace events for all migration scenarios including base page, THP and HugeTLB. This patch (of 3): This adds two trace events for PMD based THP migration without split. These events closely follow the implementation details like setting and removing of PMD migration entries, which are essential operations for THP migration. This moves CREATE_TRACE_POINTS into generic THP from powerpc for these new trace events to be available on other platforms as well.
Unified · Split
| @@ -3,6 +3,5 @@ · 2 unmodified lines | |||
| 3 | * This file is for defining trace points and trace related helpers. | 3 | * This file is for defining trace points and trace related helpers. |
| 4 | */ | 4 | */ |
| 5 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE | 5 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
| 6 | #define CREATE_TRACE_POINTS | ||
| 7 | #include <trace/events/thp.h> | 6 | #include <trace/events/thp.h> |
| 8 | #endif | 7 | #endif |
| @@ -48,6 +48,33 @@ TRACE_EVENT(hugepage_update, · 47 unmodified lines | |||
| 48 | TP_printk("hugepage update at addr 0x%lx and pte = 0x%lx clr = 0x%lx, set = 0x%lx", __entry->addr, __entry->pte, __entry->clr, __entry->set) | 48 | TP_printk("hugepage update at addr 0x%lx and pte = 0x%lx clr = 0x%lx, set = 0x%lx", __entry->addr, __entry->pte, __entry->clr, __entry->set) |
| 49 | ); | 49 | ); |
| 50 | 50 | ||
| 51 | DECLARE_EVENT_CLASS(migration_pmd, | ||
| 52 | |||
| 53 | TP_PROTO(unsigned long addr, unsigned long pmd), | ||
| 54 | |||
| 55 | TP_ARGS(addr, pmd), | ||
| 56 | |||
| 57 | TP_STRUCT__entry( | ||
| 58 | __field(unsigned long, addr) | ||
| 59 | __field(unsigned long, pmd) | ||
| 60 | ), | ||
| 61 | |||
| 62 | TP_fast_assign( | ||
| 63 | __entry->addr = addr; | ||
| 64 | __entry->pmd = pmd; | ||
| 65 | ), | ||
| 66 | TP_printk("addr=%lx, pmd=%lx", __entry->addr, __entry->pmd) | ||
| 67 | ); | ||
| 68 | |||
| 69 | DEFINE_EVENT(migration_pmd, set_migration_pmd, | ||
| 70 | TP_PROTO(unsigned long addr, unsigned long pmd), | ||
| 71 | TP_ARGS(addr, pmd) | ||
| 72 | ); | ||
| 73 | |||
| 74 | DEFINE_EVENT(migration_pmd, remove_migration_pmd, | ||
| 75 | TP_PROTO(unsigned long addr, unsigned long pmd), | ||
| 76 | TP_ARGS(addr, pmd) | ||
| 77 | ); | ||
| 51 | #endif /* _TRACE_THP_H */ | 78 | #endif /* _TRACE_THP_H */ |
| 52 | 79 | ||
| 53 | /* This part must be outside protection */ | 80 | /* This part must be outside protection */ |
| @@ -40,6 +40,9 @@ · 39 unmodified lines | |||
| 40 | #include <asm/pgalloc.h> | 40 | #include <asm/pgalloc.h> |
| 41 | #include "internal.h" | 41 | #include "internal.h" |
| 42 | 42 | ||
| 43 | #define CREATE_TRACE_POINTS | ||
| 44 | #include <trace/events/thp.h> | ||
| 45 | |||
| 43 | /* | 46 | /* |
| 44 | * By default, transparent hugepage support is disabled in order to avoid | 47 | * By default, transparent hugepage support is disabled in order to avoid |
| 45 | * risking an increased memory footprint for applications that are not | 48 | * risking an increased memory footprint for applications that are not |
| @@ -3131,6 +3134,7 @@ void set_pmd_migration_entry(struct page_vma_mapped_walk *pvmw, · 3085 unmodified lines | |||
| 3131 | set_pmd_at(mm, address, pvmw->pmd, pmdswp); | 3134 | set_pmd_at(mm, address, pvmw->pmd, pmdswp); |
| 3132 | page_remove_rmap(page, vma, true); | 3135 | page_remove_rmap(page, vma, true); |
| 3133 | put_page(page); | 3136 | put_page(page); |
| 3137 | trace_set_migration_pmd(address, pmd_val(pmdswp)); | ||
| 3134 | } | 3138 | } |
| 3135 | 3139 | ||
| 3136 | void remove_migration_pmd(struct page_vma_mapped_walk *pvmw, struct page *new) | 3140 | void remove_migration_pmd(struct page_vma_mapped_walk *pvmw, struct page *new) |
| @@ -3163,5 +3167,6 @@ void remove_migration_pmd(struct page_vma_mapped_walk *pvmw, struct page *new) · 26 unmodified lines | |||
| 3163 | 3167 | ||
| 3164 | /* No need to invalidate - it was non-present before */ | 3168 | /* No need to invalidate - it was non-present before */ |
| 3165 | update_mmu_cache_pmd(vma, address, pvmw->pmd); | 3169 | update_mmu_cache_pmd(vma, address, pvmw->pmd); |
| 3170 | trace_remove_migration_pmd(address, pmd_val(pmde)); | ||
| 3166 | } | 3171 | } |
| 3167 | #endif | 3172 | #endif |