From 045634ff1e8615714546d9dca92fcdbe0fd898ef Mon Sep 17 00:00:00 2001
From: Gautam Menghani <gautammenghani201@gmail.com>
Date: Wed, 26 Oct 2022 10:15:24 +0530
Subject: [PATCH] mm/khugepaged: refactor mm_khugepaged_scan_file tracepoint to
remove filename from function call
Refactor the mm_khugepaged_scan_file tracepoint to move filename
dereference to the tracepoint definition, to maintain consistency with
other tracepoints[1].
[1]:lore.kernel.org/lkml/20221024111621.3ba17e2c@gandalf.local.home/
Link: https://lkml.kernel.org/r/20221026044524.54793-1-gautammenghani201@gmail.com
Fixes: d41fd2016ed07 ("mm/khugepaged: add tracepoint to hpage_collapse_scan_file()")
Signed-off-by: Gautam Menghani <gautammenghani201@gmail.com>
Reviewed-by: Yang Shi <shy828301@gmail.com>
Reviewed-by: Zach O'Keefe <zokeefe@google.com>
Reviewed-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Cc: David Hildenbrand <david@redhat.com>
Cc: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
include/trace/events/huge_memory.h | 8 ++++----
mm/khugepaged.c | 3 +--
2 files changed, 5 insertions(+), 6 deletions(-)
diff --git a/include/trace/events/huge_memory.h b/include/trace/events/huge_memory.h
index 935af49479173..760455dfa8600 100644
--- a/include/trace/events/huge_memory.h
+++ b/include/trace/events/huge_memory.h
@@ -171,15 +171,15 @@ TRACE_EVENT(mm_collapse_huge_page_swapin,
TRACE_EVENT(mm_khugepaged_scan_file,
- TP_PROTO(struct mm_struct *mm, struct page *page, const char *filename,
+ TP_PROTO(struct mm_struct *mm, struct page *page, struct file *file,
int present, int swap, int result),
- TP_ARGS(mm, page, filename, present, swap, result),
+ TP_ARGS(mm, page, file, present, swap, result),
TP_STRUCT__entry(
__field(struct mm_struct *, mm)
__field(unsigned long, pfn)
- __string(filename, filename)
+ __string(filename, file->f_path.dentry->d_iname)
__field(int, present)
__field(int, swap)
__field(int, result)
@@ -188,7 +188,7 @@ TRACE_EVENT(mm_khugepaged_scan_file,
TP_fast_assign(
__entry->mm = mm;
__entry->pfn = page ? page_to_pfn(page) : -1;
- __assign_str(filename, filename);
+ __assign_str(filename, file->f_path.dentry->d_iname);
__entry->present = present;
__entry->swap = swap;
__entry->result = result;
diff --git a/mm/khugepaged.c b/mm/khugepaged.c
index 52b9cae2412d7..a8d5ef2a77d24 100644
--- a/mm/khugepaged.c
+++ b/mm/khugepaged.c
@@ -2153,8 +2153,7 @@ static int hpage_collapse_scan_file(struct mm_struct *mm, unsigned long addr,
}
}
- trace_mm_khugepaged_scan_file(mm, page, file->f_path.dentry->d_iname,
- present, swap, result);
+ trace_mm_khugepaged_scan_file(mm, page, file, present, swap, result);
return result;
}
#else
--
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