From 4cc79b3303f224a920f3aff21f3d231749d73384 Mon Sep 17 00:00:00 2001 From: Anshuman Khandual Date: Thu, 24 Mar 2022 18:10:01 -0700 Subject: mm/migration: add trace events for base page and HugeTLB migrations This adds two trace events for base page and HugeTLB page migrations. These events, closely follow the implementation details like setting and removing of PTE migration entries, which are essential operations for migration. The new CREATE_TRACE_POINTS in covers both and based trace events. Hence drop redundant CREATE_TRACE_POINTS from other places which could have otherwise conflicted during build. Link: https://lkml.kernel.org/r/1643368182-9588-3-git-send-email-anshuman.khandual@arm.com Signed-off-by: Anshuman Khandual Reported-by: kernel test robot Cc: Steven Rostedt Cc: Ingo Molnar Cc: Zi Yan Cc: Naoya Horiguchi Cc: John Hubbard Cc: Matthew Wilcox Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/rmap.c | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'mm/rmap.c') diff --git a/mm/rmap.c b/mm/rmap.c index ee1f10df984d..bfcc8e3d412f 100644 --- a/mm/rmap.c +++ b/mm/rmap.c @@ -76,7 +76,9 @@ #include +#define CREATE_TRACE_POINTS #include +#include #include "internal.h" @@ -1849,6 +1851,8 @@ static bool try_to_migrate_one(struct folio *folio, struct vm_area_struct *vma, if (pte_swp_uffd_wp(pteval)) swp_pte = pte_swp_mkuffd_wp(swp_pte); set_pte_at(mm, pvmw.address, pvmw.pte, swp_pte); + trace_set_migration_pte(pvmw.address, pte_val(swp_pte), + compound_order(&folio->page)); /* * No need to invalidate here it will synchronize on * against the special swap migration pte. @@ -1917,6 +1921,8 @@ static bool try_to_migrate_one(struct folio *folio, struct vm_area_struct *vma, if (pte_uffd_wp(pteval)) swp_pte = pte_swp_mkuffd_wp(swp_pte); set_pte_at(mm, address, pvmw.pte, swp_pte); + trace_set_migration_pte(address, pte_val(swp_pte), + compound_order(&folio->page)); /* * No need to invalidate here it will synchronize on * against the special swap migration pte. -- cgit v1.2.3