GFS2: Add an AIL writeback tracepoint
Add a tracepoint for monitoring writeback of the AIL.
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
diff --git a/fs/gfs2/trace_gfs2.h b/fs/gfs2/trace_gfs2.h
index 9133d0a..5d07609 100644
--- a/fs/gfs2/trace_gfs2.h
+++ b/fs/gfs2/trace_gfs2.h
@@ -10,6 +10,7 @@
#include <linux/buffer_head.h>
#include <linux/dlmconstants.h>
#include <linux/gfs2_ondisk.h>
+#include <linux/writeback.h>
#include "incore.h"
#include "glock.h"
@@ -320,6 +321,33 @@
MINOR(__entry->dev), __entry->blocks)
);
+/* Writing back the AIL */
+TRACE_EVENT(gfs2_ail_flush,
+
+ TP_PROTO(const struct gfs2_sbd *sdp, const struct writeback_control *wbc, int start),
+
+ TP_ARGS(sdp, wbc, start),
+
+ TP_STRUCT__entry(
+ __field( dev_t, dev )
+ __field( int, start )
+ __field( int, sync_mode )
+ __field( long, nr_to_write )
+ ),
+
+ TP_fast_assign(
+ __entry->dev = sdp->sd_vfs->s_dev;
+ __entry->start = start;
+ __entry->sync_mode = wbc->sync_mode;
+ __entry->nr_to_write = wbc->nr_to_write;
+ ),
+
+ TP_printk("%u,%u ail flush %s %s %ld", MAJOR(__entry->dev),
+ MINOR(__entry->dev), __entry->start ? "start" : "end",
+ __entry->sync_mode == WB_SYNC_ALL ? "all" : "none",
+ __entry->nr_to_write)
+);
+
/* Section 3 - bmap
*
* Objectives: