Dump page order to trace to be able to distinguish between small page
and huge page in page cache.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
Acked-by: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
---
include/trace/events/filemap.h | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/include/trace/events/filemap.h b/include/trace/events/filemap.h
index 0421f49a20..7e14b13470 100644
--- a/include/trace/events/filemap.h
+++ b/include/trace/events/filemap.h
@@ -21,6 +21,7 @@ DECLARE_EVENT_CLASS(mm_filemap_op_page_cache,
__field(struct page *, page)
__field(unsigned long, i_ino)
__field(unsigned long, index)
+ __field(int, order)
__field(dev_t, s_dev)
),
@@ -28,18 +29,20 @@ DECLARE_EVENT_CLASS(mm_filemap_op_page_cache,
__entry->page = page;
__entry->i_ino = page->mapping->host->i_ino;
__entry->index = page->index;
+ __entry->order = compound_order(page);
if (page->mapping->host->i_sb)
__entry->s_dev = page->mapping->host->i_sb->s_dev;
else
__entry->s_dev = page->mapping->host->i_rdev;
),
- TP_printk("dev %d:%d ino %lx page=%p pfn=%lu ofs=%lu",
+ TP_printk("dev %d:%d ino %lx page=%p pfn=%lu ofs=%lu order=%d",
MAJOR(__entry->s_dev), MINOR(__entry->s_dev),
__entry->i_ino,
__entry->page,
page_to_pfn(__entry->page),
- __entry->index << PAGE_SHIFT)
+ __entry->index << PAGE_SHIFT,
+ __entry->order)
);
DEFINE_EVENT(mm_filemap_op_page_cache, mm_filemap_delete_from_page_cache,
--
1.8.4.rc3
--
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