diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c
index 00fc38d..a99ed47 100644
--- a/kernel/trace/ring_buffer.c
+++ b/kernel/trace/ring_buffer.c
@@ -1358,6 +1358,13 @@ static inline void rb_inc_page(struct buffer_page **bpage)
 	*bpage = list_entry(p, struct buffer_page, list);
 }
 
+static inline void rb_dec_page(struct buffer_page **bpage)
+{
+	struct list_head *p = rb_list_head((*bpage)->list.prev);
+
+	*bpage = list_entry(p, struct buffer_page, list);
+}
+
 static struct buffer_page *
 rb_set_head_page(struct ring_buffer_per_cpu *cpu_buffer)
 {
@@ -1866,10 +1873,11 @@ static int rb_validate_buffer(struct buffer_data_page *dpage, int cpu)
 static void rb_meta_validate_events(struct ring_buffer_per_cpu *cpu_buffer)
 {
 	struct ring_buffer_cpu_meta *meta = cpu_buffer->ring_meta;
-	struct buffer_page *head_page;
+	struct buffer_page *head_page, *orig_head;
 	unsigned long entry_bytes = 0;
 	unsigned long entries = 0;
 	int ret;
+	u64 ts;
 	int i;
 
 	if (!meta || !meta->head_buffer)
@@ -1885,8 +1893,98 @@ static void rb_meta_validate_events(struct ring_buffer_per_cpu *cpu_buffer)
 	entry_bytes += local_read(&cpu_buffer->reader_page->page->commit);
 	local_set(&cpu_buffer->reader_page->entries, ret);
 
-	head_page = cpu_buffer->head_page;
+	orig_head = head_page = cpu_buffer->head_page;
+	ts = head_page->page->time_stamp;
 
+	/*
+	 * Try to rewind the head so that we can read the pages which already
+	 * read in the previous boot.
+	 */
+	if (head_page == cpu_buffer->tail_page)
+		goto skip_rewind;
+
+	rb_dec_page(&head_page);
+	for (i = 0; i < meta->nr_subbufs + 1; i++, rb_dec_page(&head_page)) {
+
+		/* Rewind until tail (writer) page. */
+		if (head_page == cpu_buffer->tail_page)
+			break;
+
+		/* Ensure the page has older data than head. */
+		if (ts < head_page->page->time_stamp)
+			break;
+
+		ts = head_page->page->time_stamp;
+		/* Ensure the page has correct timestamp and some data. */
+		if (!ts || rb_page_commit(head_page) == 0)
+			break;
+
+		/* Stop rewind if the page is invalid. */
+		ret = rb_validate_buffer(head_page->page, cpu_buffer->cpu);
+		if (ret < 0)
+			break;
+
+		/* Recover the number of entries and update stats. */
+		local_set(&head_page->entries, ret);
+		if (ret)
+			local_inc(&cpu_buffer->pages_touched);
+		entries += ret;
+		entry_bytes += rb_page_commit(head_page);
+	}
+	if (i)
+		pr_info("Ring buffer [%d] rewound %d pages\n", cpu_buffer->cpu, i);
+
+	/* The last rewound page must be skipped. */
+	if (head_page != orig_head)
+		rb_inc_page(&head_page);
+
+	/*
+	 * If the ring buffer was rewound, then inject the reader page
+	 * into the location just before the original head page.
+	 */
+	if (head_page != orig_head) {
+		struct buffer_page *bpage = orig_head;
+
+		rb_dec_page(&bpage);
+		/*
+		 * Insert the reader_page before the original head page.
+		 * Since the list encode RB_PAGE flags, general list
+		 * operations should be avoided.
+		 */
+		cpu_buffer->reader_page->list.next = &orig_head->list;
+		cpu_buffer->reader_page->list.prev = orig_head->list.prev;
+		orig_head->list.prev = &cpu_buffer->reader_page->list;
+		bpage->list.next = &cpu_buffer->reader_page->list;
+
+		/* Make the head_page the reader page */
+		cpu_buffer->reader_page = head_page;
+		bpage = head_page;
+		rb_inc_page(&head_page);
+		head_page->list.prev = bpage->list.prev;
+		rb_dec_page(&bpage);
+		bpage->list.next = &head_page->list;
+		rb_set_list_to_head(&bpage->list);
+		cpu_buffer->pages = &head_page->list;
+
+		cpu_buffer->head_page = head_page;
+		meta->head_buffer = (unsigned long)head_page->page;
+
+		/* Reset all the indexes */
+		bpage = cpu_buffer->reader_page;
+		meta->buffers[0] = rb_meta_subbuf_idx(meta, bpage->page);
+		bpage->id = 0;
+
+		for (i = 1, bpage = head_page; i < meta->nr_subbufs;
+		     i++, rb_inc_page(&bpage)) {
+			meta->buffers[i] = rb_meta_subbuf_idx(meta, bpage->page);
+			bpage->id = i;
+		}
+
+		/* We'll restart verifying from orig_head */
+		head_page = orig_head;
+	}
+
+ skip_rewind:
 	/* If the commit_buffer is the reader page, update the commit page */
 	if (meta->commit_buffer == (unsigned long)cpu_buffer->reader_page->page) {
 		cpu_buffer->commit_page = cpu_buffer->reader_page;
@@ -5342,7 +5440,6 @@ rb_get_reader_page(struct ring_buffer_per_cpu *cpu_buffer)
 	 */
 	local_set(&cpu_buffer->reader_page->write, 0);
 	local_set(&cpu_buffer->reader_page->entries, 0);
-	local_set(&cpu_buffer->reader_page->page->commit, 0);
 	cpu_buffer->reader_page->real_end = 0;
 
  spin: