From 283fd6fe0528ae2fe0222a35ecfdfcbbaeee8159 Mon Sep 17 00:00:00 2001 From: Anshuman Khandual Date: Thu, 24 Mar 2022 18:09:58 -0700 Subject: mm/migration: add trace events for THP migrations 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. Link: https://lkml.kernel.org/r/1643368182-9588-1-git-send-email-anshuman.khandual@arm.com Link: https://lkml.kernel.org/r/1643368182-9588-2-git-send-email-anshuman.khandual@arm.com Signed-off-by: Anshuman Khandual Cc: Steven Rostedt Cc: Ingo Molnar Cc: Zi Yan Cc: Naoya Horiguchi Cc: John Hubbard Cc: Matthew Wilcox Cc: Michael Ellerman Cc: Paul Mackerras Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/huge_memory.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'mm/huge_memory.c') diff --git a/mm/huge_memory.c b/mm/huge_memory.c index 005fab2f3b73..035aa204ab8d 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -40,6 +40,9 @@ #include #include "internal.h" +#define CREATE_TRACE_POINTS +#include + /* * By default, transparent hugepage support is disabled in order to avoid * 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, set_pmd_at(mm, address, pvmw->pmd, pmdswp); page_remove_rmap(page, vma, true); put_page(page); + trace_set_migration_pmd(address, pmd_val(pmdswp)); } 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) /* No need to invalidate - it was non-present before */ update_mmu_cache_pmd(vma, address, pvmw->pmd); + trace_remove_migration_pmd(address, pmd_val(pmde)); } #endif -- cgit v1.2.3-70-g09d2