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-rw-r--r--include/trace/events/kmem.h47
1 files changed, 47 insertions, 0 deletions
diff --git a/include/trace/events/kmem.h b/include/trace/events/kmem.h
index 69e8bb8963db..ad7e642bd497 100644
--- a/include/trace/events/kmem.h
+++ b/include/trace/events/kmem.h
@@ -316,6 +316,53 @@ TRACE_EVENT(mm_page_alloc_extfrag,
__entry->change_ownership)
);
+/*
+ * Required for uniquely and securely identifying mm in rss_stat tracepoint.
+ */
+#ifndef __PTR_TO_HASHVAL
+static unsigned int __maybe_unused mm_ptr_to_hash(const void *ptr)
+{
+ int ret;
+ unsigned long hashval;
+
+ ret = ptr_to_hashval(ptr, &hashval);
+ if (ret)
+ return 0;
+
+ /* The hashed value is only 32-bit */
+ return (unsigned int)hashval;
+}
+#define __PTR_TO_HASHVAL
+#endif
+
+TRACE_EVENT(rss_stat,
+
+ TP_PROTO(struct mm_struct *mm,
+ int member,
+ long count),
+
+ TP_ARGS(mm, member, count),
+
+ TP_STRUCT__entry(
+ __field(unsigned int, mm_id)
+ __field(unsigned int, curr)
+ __field(int, member)
+ __field(long, size)
+ ),
+
+ TP_fast_assign(
+ __entry->mm_id = mm_ptr_to_hash(mm);
+ __entry->curr = !!(current->mm == mm);
+ __entry->member = member;
+ __entry->size = (count << PAGE_SHIFT);
+ ),
+
+ TP_printk("mm_id=%u curr=%d member=%d size=%ldB",
+ __entry->mm_id,
+ __entry->curr,
+ __entry->member,
+ __entry->size)
+ );
#endif /* _TRACE_KMEM_H */
/* This part must be outside protection */