diff options
| author | Takaya Saeki <takayas@chromium.org> | 2024-09-03 10:21:00 +0000 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2024-09-09 16:39:12 -0700 |
| commit | fc1b43c422f3deee0cfc221b071c3863dc077646 (patch) | |
| tree | 1cb9891100673bcd84c2f2d6d8a6dcc3cd8cc053 | |
| parent | e1e4cfd01a6e75dd4c810aeac115340805cf63ff (diff) | |
filemap: fix the last_index of mm_filemap_get_pages
In commit b6273b55d885 ("filemap: add trace events for get_pages,
map_pages, and fault"), mm_filemap_get_pages was added to trace page cache
access. However, it tracks an extra page beyond the end of the accessed
range. This patch fixes it by replacing last_index with last_index - 1.
Link: https://lkml.kernel.org/r/20240903102100.70405-1-takayas@chromium.org
Fixes: b6273b55d885 ("filemap: add trace events for get_pages, map_pages, and fault")
Signed-off-by: Takaya Saeki <takayas@chromium.org>
Cc: Junichi Uekawa <uekawa@chromium.org>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Steven Rostedt (Google) <rostedt@goodmis.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| -rw-r--r-- | mm/filemap.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/filemap.c b/mm/filemap.c index 88a2ed008474..7eb4637ea199 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -2567,7 +2567,7 @@ retry: goto err; } - trace_mm_filemap_get_pages(mapping, index, last_index); + trace_mm_filemap_get_pages(mapping, index, last_index - 1); return 0; err: if (err < 0) |