The patch titled
Subject: mm/madvise: add huge_memory:mm_madvise_collapse tracepoint
has been added to the -mm mm-unstable branch. Its filename is
mm-madvise-add-huge_memory-mm_madvise_collapse-tracepoint.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-madvise-add-huge_memory-mm_madvise_collapse-tracepoint.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: "Zach O'Keefe" <zokeefe@xxxxxxxxxx>
Subject: mm/madvise: add huge_memory:mm_madvise_collapse tracepoint
Date: Wed, 6 Jul 2022 16:59:29 -0700
Add a tracepoint to expose mm, address, and enum scan_result of each
hugepage attempted to be collapsed by call to madvise(MADV_COLLAPSE).
Link: https://lkml.kernel.org/r/20220706235936.2197195-12-zokeefe@xxxxxxxxxx
Signed-off-by: Zach O'Keefe <zokeefe@xxxxxxxxxx>
Cc: Alex Shi <alex.shi@xxxxxxxxxxxxxxxxx>
Cc: Andrea Arcangeli <aarcange@xxxxxxxxxx>
Cc: Arnd Bergmann <arnd@xxxxxxxx>
Cc: Axel Rasmussen <axelrasmussen@xxxxxxxxxx>
Cc: Chris Kennelly <ckennelly@xxxxxxxxxx>
Cc: Chris Zankel <chris@xxxxxxxxxx>
Cc: David Hildenbrand <david@xxxxxxxxxx>
Cc: David Rientjes <rientjes@xxxxxxxxxx>
Cc: Helge Deller <deller@xxxxxx>
Cc: Hugh Dickins <hughd@xxxxxxxxxx>
Cc: Ivan Kokshaysky <ink@xxxxxxxxxxxxxxxxxxxx>
Cc: James Bottomley <James.Bottomley@xxxxxxxxxxxxxxxxxxxxx>
Cc: Jens Axboe <axboe@xxxxxxxxx>
Cc: "Kirill A. Shutemov" <kirill.shutemov@xxxxxxxxxxxxxxx>
Cc: Matthew Wilcox <willy@xxxxxxxxxxxxx>
Cc: Matt Turner <mattst88@xxxxxxxxx>
Cc: Max Filippov <jcmvbkbc@xxxxxxxxx>
Cc: Miaohe Lin <linmiaohe@xxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxx>
Cc: Minchan Kim <minchan@xxxxxxxxxx>
Cc: Pasha Tatashin <pasha.tatashin@xxxxxxxxxx>
Cc: Pavel Begunkov <asml.silence@xxxxxxxxx>
Cc: Peter Xu <peterx@xxxxxxxxxx>
Cc: Rongwei Wang <rongwei.wang@xxxxxxxxxxxxxxxxx>
Cc: SeongJae Park <sj@xxxxxxxxxx>
Cc: Song Liu <songliubraving@xxxxxx>
Cc: Thomas Bogendoerfer <tsbogend@xxxxxxxxxxxxxxxx>
Cc: Vlastimil Babka <vbabka@xxxxxxx>
Cc: Yang Shi <shy828301@xxxxxxxxx>
Cc: Zi Yan <ziy@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/trace/events/huge_memory.h | 22 ++++++++++++++++++++++
mm/khugepaged.c | 2 ++
2 files changed, 24 insertions(+)
--- a/include/trace/events/huge_memory.h~mm-madvise-add-huge_memory-mm_madvise_collapse-tracepoint
+++ a/include/trace/events/huge_memory.h
@@ -167,5 +167,27 @@ TRACE_EVENT(mm_collapse_huge_page_swapin
__entry->ret)
);
+TRACE_EVENT(mm_madvise_collapse,
+
+ TP_PROTO(struct mm_struct *mm, unsigned long addr, int result),
+
+ TP_ARGS(mm, addr, result),
+
+ TP_STRUCT__entry(__field(struct mm_struct *, mm)
+ __field(unsigned long, addr)
+ __field(int, result)
+ ),
+
+ TP_fast_assign(__entry->mm = mm;
+ __entry->addr = addr;
+ __entry->result = result;
+ ),
+
+ TP_printk("mm=%p addr=%#lx result=%s",
+ __entry->mm,
+ __entry->addr,
+ __print_symbolic(__entry->result, SCAN_STATUS))
+);
+
#endif /* __HUGE_MEMORY_H */
#include <trace/define_trace.h>
--- a/mm/khugepaged.c~mm-madvise-add-huge_memory-mm_madvise_collapse-tracepoint
+++ a/mm/khugepaged.c
@@ -2438,6 +2438,8 @@ int madvise_collapse(struct vm_area_stru
if (!mmap_locked)
*prev = NULL; /* Tell caller we dropped mmap_lock */
+ trace_mm_madvise_collapse(mm, addr, result);
+
switch (result) {
case SCAN_SUCCEED:
case SCAN_PMD_MAPPED:
_
Patches currently in -mm which might be from zokeefe@xxxxxxxxxx are
mm-khugepaged-remove-redundant-transhuge_vma_suitable-check.patch
mm-khugepaged-add-struct-collapse_control.patch
mm-khugepaged-dedup-and-simplify-hugepage-alloc-and-charging.patch
mm-khugepaged-pipe-enum-scan_result-codes-back-to-callers.patch
mm-khugepaged-add-flag-to-predicate-khugepaged-only-behavior.patch
mm-thp-add-flag-to-enforce-sysfs-thp-in-hugepage_vma_check.patch
mm-khugepaged-record-scan_pmd_mapped-when-scan_pmd-finds-hugepage.patch
mm-madvise-introduce-madv_collapse-sync-hugepage-collapse.patch
mm-khugepaged-rename-prefix-of-shared-collapse-functions.patch
mm-madvise-add-huge_memory-mm_madvise_collapse-tracepoint.patch
mm-madvise-add-madv_collapse-to-process_madvise.patch
proc-smaps-add-pmdmappable-field-to-smaps.patch
selftests-vm-modularize-collapse-selftests.patch
selftests-vm-dedup-hugepage-allocation-logic.patch
selftests-vm-add-madv_collapse-collapse-context-to-selftests.patch
selftests-vm-add-selftest-to-verify-recollapse-of-thps.patch
selftests-vm-add-selftest-to-verify-multi-thp-collapse.patch
