scftorture: Count single_rpc offline failures in statistics outputgrafted

scf_torture_stats_print() aggregates each invoker thread's counters
into a local scf_statistics structure before printing, but the
n_single_rpc_ofl field is missing from the aggregation loop.  As a
result, the "single_rpc_ofl" value printed in the statistics line is
always zero, even when smp_call_function_single() invocations for the
RPC test have failed due to offline CPUs and been counted by the
invoker threads.

Add the missing accumulation so that the printed value reflects the
actual counts.

Signed-off-by: Joel Fernandes <joelagnelf@nvidia.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>

1 files changed, 202 insertions, 0 deletions

diff --git a/include/trace/events/filemap.h b/include/trace/events/filemap.h
new file mode 100644
index 000000000..4dcf8e9e2
--- /dev/null
+++ b/include/trace/events/filemap.h
@@ -0,0 +1,202 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM filemap
+
+#if !defined(_TRACE_FILEMAP_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_FILEMAP_H
+
+#include <linux/types.h>
+#include <linux/tracepoint.h>
+#include <linux/mm.h>
+#include <linux/memcontrol.h>
+#include <linux/device.h>
+#include <linux/kdev_t.h>
+#include <linux/errseq.h>
+
+DECLARE_EVENT_CLASS(mm_filemap_op_page_cache,
+
+	TP_PROTO(struct folio *folio),
+
+	TP_ARGS(folio),
+
+	TP_STRUCT__entry(
+		__field(u64, i_ino)
+		__field(unsigned long, pfn)
+		__field(unsigned long, index)
+		__field(dev_t, s_dev)
+		__field(unsigned char, order)
+	),
+
+	TP_fast_assign(
+		__entry->pfn = folio_pfn(folio);
+		__entry->i_ino = folio->mapping->host->i_ino;
+		__entry->index = folio->index;
+		if (folio->mapping->host->i_sb)
+			__entry->s_dev = folio->mapping->host->i_sb->s_dev;
+		else
+			__entry->s_dev = folio->mapping->host->i_rdev;
+		__entry->order = folio_order(folio);
+	),
+
+	TP_printk("dev %d:%d ino %llx pfn=0x%lx ofs=%lu order=%u",
+		MAJOR(__entry->s_dev), MINOR(__entry->s_dev),
+		__entry->i_ino,
+		__entry->pfn,
+		__entry->index << PAGE_SHIFT,
+		__entry->order)
+);
+
+DEFINE_EVENT(mm_filemap_op_page_cache, mm_filemap_delete_from_page_cache,
+	TP_PROTO(struct folio *folio),
+	TP_ARGS(folio)
+	);
+
+DEFINE_EVENT(mm_filemap_op_page_cache, mm_filemap_add_to_page_cache,
+	TP_PROTO(struct folio *folio),
+	TP_ARGS(folio)
+	);
+
+DECLARE_EVENT_CLASS(mm_filemap_op_page_cache_range,
+
+	TP_PROTO(
+		struct address_space *mapping,
+		pgoff_t index,
+		pgoff_t last_index
+	),
+
+	TP_ARGS(mapping, index, last_index),
+
+	TP_STRUCT__entry(
+		__field(u64, i_ino)
+		__field(dev_t, s_dev)
+		__field(unsigned long, index)
+		__field(unsigned long, last_index)
+	),
+
+	TP_fast_assign(
+		__entry->i_ino = mapping->host->i_ino;
+		if (mapping->host->i_sb)
+			__entry->s_dev =
+				mapping->host->i_sb->s_dev;
+		else
+			__entry->s_dev = mapping->host->i_rdev;
+		__entry->index = index;
+		__entry->last_index = last_index;
+	),
+
+	TP_printk(
+		"dev=%d:%d ino=%llx ofs=%lld-%lld",
+		MAJOR(__entry->s_dev),
+		MINOR(__entry->s_dev), __entry->i_ino,
+		((loff_t)__entry->index) << PAGE_SHIFT,
+		((((loff_t)__entry->last_index + 1) << PAGE_SHIFT) - 1)
+	)
+);
+
+DEFINE_EVENT(mm_filemap_op_page_cache_range, mm_filemap_get_pages,
+	TP_PROTO(
+		struct address_space *mapping,
+		pgoff_t index,
+		pgoff_t last_index
+	),
+	TP_ARGS(mapping, index, last_index)
+);
+
+DEFINE_EVENT(mm_filemap_op_page_cache_range, mm_filemap_map_pages,
+	TP_PROTO(
+		struct address_space *mapping,
+		pgoff_t index,
+		pgoff_t last_index
+	),
+	TP_ARGS(mapping, index, last_index)
+);
+
+TRACE_EVENT(mm_filemap_fault,
+	TP_PROTO(struct address_space *mapping, pgoff_t index),
+
+	TP_ARGS(mapping, index),
+
+	TP_STRUCT__entry(
+		__field(u64, i_ino)
+		__field(dev_t, s_dev)
+		__field(unsigned long, index)
+	),
+
+	TP_fast_assign(
+		__entry->i_ino = mapping->host->i_ino;
+		if (mapping->host->i_sb)
+			__entry->s_dev =
+				mapping->host->i_sb->s_dev;
+		else
+			__entry->s_dev = mapping->host->i_rdev;
+		__entry->index = index;
+	),
+
+	TP_printk(
+		"dev=%d:%d ino=%llx ofs=%lld",
+		MAJOR(__entry->s_dev),
+		MINOR(__entry->s_dev), __entry->i_ino,
+		((loff_t)__entry->index) << PAGE_SHIFT
+	)
+);
+
+TRACE_EVENT(filemap_set_wb_err,
+		TP_PROTO(struct address_space *mapping, errseq_t eseq),
+
+		TP_ARGS(mapping, eseq),
+
+		TP_STRUCT__entry(
+			__field(u64, i_ino)
+			__field(dev_t, s_dev)
+			__field(errseq_t, errseq)
+		),
+
+		TP_fast_assign(
+			__entry->i_ino = mapping->host->i_ino;
+			__entry->errseq = eseq;
+			if (mapping->host->i_sb)
+				__entry->s_dev = mapping->host->i_sb->s_dev;
+			else
+				__entry->s_dev = mapping->host->i_rdev;
+		),
+
+		TP_printk("dev=%d:%d ino=0x%llx errseq=0x%x",
+			MAJOR(__entry->s_dev), MINOR(__entry->s_dev),
+			__entry->i_ino, __entry->errseq)
+);
+
+TRACE_EVENT(file_check_and_advance_wb_err,
+		TP_PROTO(struct file *file, errseq_t old),
+
+		TP_ARGS(file, old),
+
+		TP_STRUCT__entry(
+			__field(u64, i_ino)
+			__field(struct file *, file)
+			__field(dev_t, s_dev)
+			__field(errseq_t, old)
+			__field(errseq_t, new)
+		),
+
+		TP_fast_assign(
+			__entry->file = file;
+			__entry->i_ino = file->f_mapping->host->i_ino;
+			if (file->f_mapping->host->i_sb)
+				__entry->s_dev =
+					file->f_mapping->host->i_sb->s_dev;
+			else
+				__entry->s_dev =
+					file->f_mapping->host->i_rdev;
+			__entry->old = old;
+			__entry->new = file->f_wb_err;
+		),
+
+		TP_printk("file=%p dev=%d:%d ino=0x%llx old=0x%x new=0x%x",
+			__entry->file, MAJOR(__entry->s_dev),
+			MINOR(__entry->s_dev), __entry->i_ino, __entry->old,
+			__entry->new)
+);
+#endif /* _TRACE_FILEMAP_H */
+
+/* This part must be outside protection */
+#include <trace/define_trace.h>