From: "Zach O'Keefe" <zokeefe@google.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: linux-mm@kvack.org, linux-api@vger.kernel.org,
Axel Rasmussen <axelrasmussen@google.com>,
James Houghton <jthoughton@google.com>,
Hugh Dickins <hughd@google.com>, Yang Shi <shy828301@gmail.com>,
Miaohe Lin <linmiaohe@huawei.com>,
David Hildenbrand <david@redhat.com>,
David Rientjes <rientjes@google.com>,
Matthew Wilcox <willy@infradead.org>,
Pasha Tatashin <pasha.tatashin@soleen.com>,
Peter Xu <peterx@redhat.com>,
Rongwei Wang <rongwei.wang@linux.alibaba.com>,
SeongJae Park <sj@kernel.org>, Song Liu <songliubraving@fb.com>,
Vlastimil Babka <vbabka@suse.cz>,
Chris Kennelly <ckennelly@google.com>,
"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
Minchan Kim <minchan@kernel.org>,
Patrick Xia <patrickx@google.com>
Subject: [PATCH mm-unstable v4 04/10] mm/khugepaged: add tracepoint to hpage_collapse_scan_file()
Date: Thu, 22 Sep 2022 15:40:40 -0700 [thread overview]
Message-ID: <20220922224046.1143204-5-zokeefe@google.com> (raw)
In-Reply-To: <20220922224046.1143204-1-zokeefe@google.com>
Add huge_memory:trace_mm_khugepaged_scan_file tracepoint to
hpage_collapse_scan_file() analogously to hpage_collapse_scan_pmd().
While this change is targeted at debugging MADV_COLLAPSE pathway, the
"mm_khugepaged" prefix is retained for symmetry with
huge_memory:trace_mm_khugepaged_scan_pmd, which retains it's legacy name
to prevent changing kernel ABI as much as possible.
Link: https://lkml.kernel.org/r/20220907144521.3115321-5-zokeefe@google.com
Signed-off-by: Zach O'Keefe <zokeefe@google.com>
Reviewed-by: Yang Shi <shy828301@gmail.com>
Cc: Axel Rasmussen <axelrasmussen@google.com>
Cc: Chris Kennelly <ckennelly@google.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: James Houghton <jthoughton@google.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Miaohe Lin <linmiaohe@huawei.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Pasha Tatashin <pasha.tatashin@soleen.com>
Cc: Peter Xu <peterx@redhat.com>
Cc: Rongwei Wang <rongwei.wang@linux.alibaba.com>
Cc: SeongJae Park <sj@kernel.org>
Cc: Song Liu <songliubraving@fb.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
---
include/trace/events/huge_memory.h | 34 ++++++++++++++++++++++++++++++
mm/khugepaged.c | 3 ++-
2 files changed, 36 insertions(+), 1 deletion(-)
diff --git a/include/trace/events/huge_memory.h b/include/trace/events/huge_memory.h
index df33453b70fc..935af4947917 100644
--- a/include/trace/events/huge_memory.h
+++ b/include/trace/events/huge_memory.h
@@ -169,5 +169,39 @@ TRACE_EVENT(mm_collapse_huge_page_swapin,
__entry->ret)
);
+TRACE_EVENT(mm_khugepaged_scan_file,
+
+ TP_PROTO(struct mm_struct *mm, struct page *page, const char *filename,
+ int present, int swap, int result),
+
+ TP_ARGS(mm, page, filename, present, swap, result),
+
+ TP_STRUCT__entry(
+ __field(struct mm_struct *, mm)
+ __field(unsigned long, pfn)
+ __string(filename, filename)
+ __field(int, present)
+ __field(int, swap)
+ __field(int, result)
+ ),
+
+ TP_fast_assign(
+ __entry->mm = mm;
+ __entry->pfn = page ? page_to_pfn(page) : -1;
+ __assign_str(filename, filename);
+ __entry->present = present;
+ __entry->swap = swap;
+ __entry->result = result;
+ ),
+
+ TP_printk("mm=%p, scan_pfn=0x%lx, filename=%s, present=%d, swap=%d, result=%s",
+ __entry->mm,
+ __entry->pfn,
+ __get_str(filename),
+ __entry->present,
+ __entry->swap,
+ __print_symbolic(__entry->result, SCAN_STATUS))
+);
+
#endif /* __HUGE_MEMORY_H */
#include <trace/define_trace.h>
diff --git a/mm/khugepaged.c b/mm/khugepaged.c
index a272fc065dd7..6d2dfd96608a 100644
--- a/mm/khugepaged.c
+++ b/mm/khugepaged.c
@@ -2159,7 +2159,8 @@ static int hpage_collapse_scan_file(struct mm_struct *mm, unsigned long addr,
}
}
- /* TODO: tracepoints */
+ trace_mm_khugepaged_scan_file(mm, page, file->f_path.dentry->d_iname,
+ present, swap, result);
return result;
}
#else
--
2.37.3.998.g577e59143f-goog
next prev parent reply other threads:[~2022-09-22 22:41 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-22 22:40 [PATCH mm-unstable v4 00/10] mm: add file/shmem support to MADV_COLLAPSE Zach O'Keefe
2022-09-22 22:40 ` [PATCH mm-unstable v4 01/10] mm/shmem: add flag to enforce shmem THP in hugepage_vma_check() Zach O'Keefe
2022-09-22 22:40 ` [PATCH mm-unstable v4 02/10] mm/khugepaged: attempt to map file/shmem-backed pte-mapped THPs by pmds Zach O'Keefe
2022-09-22 22:40 ` [PATCH mm-unstable v4 03/10] mm/madvise: add file and shmem support to MADV_COLLAPSE Zach O'Keefe
2022-09-26 18:39 ` Yang Shi
2022-09-27 1:24 ` Zach O'Keefe
2022-09-22 22:40 ` Zach O'Keefe [this message]
2022-09-22 22:40 ` [PATCH mm-unstable v4 05/10] selftests/vm: dedup THP helpers Zach O'Keefe
2022-09-27 15:34 ` Zi Yan
2022-09-27 16:32 ` Zach O'Keefe
2022-09-22 22:40 ` [PATCH mm-unstable v4 06/10] selftests/vm: modularize thp collapse memory operations Zach O'Keefe
2022-09-22 22:40 ` [PATCH mm-unstable v4 07/10] selftests/vm: add thp collapse file and tmpfs testing Zach O'Keefe
2022-09-22 22:40 ` [PATCH mm-unstable v4 08/10] selftests/vm: add thp collapse shmem testing Zach O'Keefe
2022-09-22 22:40 ` [PATCH mm-unstable v4 09/10] selftests/vm: add file/shmem MADV_COLLAPSE selftest for cleared pmd Zach O'Keefe
2022-09-22 22:40 ` [PATCH mm-unstable v4 10/10] selftests/vm: add selftest for MADV_COLLAPSE of uffd-minor memory Zach O'Keefe
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