xfs: add AIL pushing tracepoints

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Alex Elder <aelder@sgi.com>

2 files changed, 45 insertions, 0 deletions

diff --git a/fs/xfs/xfs_trace.h b/fs/xfs/xfs_trace.h
index b78f2c65438b..f1d2802b2f07 100644
--- a/fs/xfs/xfs_trace.h
+++ b/fs/xfs/xfs_trace.h
@@ -30,6 +30,7 @@ struct xfs_buf_log_item;
 struct xfs_da_args;
 struct xfs_da_node_entry;
 struct xfs_dquot;
+struct xfs_log_item;
 struct xlog_ticket;
 struct log;
 struct xlog_recover;
@@ -853,6 +854,42 @@ DEFINE_LOGGRANT_EVENT(xfs_log_ungrant_enter);
 DEFINE_LOGGRANT_EVENT(xfs_log_ungrant_exit);
 DEFINE_LOGGRANT_EVENT(xfs_log_ungrant_sub);
 
+DECLARE_EVENT_CLASS(xfs_log_item_class,
+        TP_PROTO(struct xfs_log_item *lip),
+        TP_ARGS(lip),
+        TP_STRUCT__entry(
+                __field(dev_t, dev)
+                __field(void *, lip)
+                __field(uint, type)
+                __field(uint, flags)
+                __field(xfs_lsn_t, lsn)
+        ),
+        TP_fast_assign(
+                __entry->dev = lip->li_mountp->m_super->s_dev;
+                __entry->lip = lip;
+                __entry->type = lip->li_type;
+                __entry->flags = lip->li_flags;
+                __entry->lsn = lip->li_lsn;
+        ),
+        TP_printk("dev %d:%d lip 0x%p lsn %d/%d type %s flags %s",
+                  MAJOR(__entry->dev), MINOR(__entry->dev),
+                  __entry->lip,
+                  CYCLE_LSN(__entry->lsn), BLOCK_LSN(__entry->lsn),
+                  __print_symbolic(__entry->type, XFS_LI_TYPE_DESC),
+                  __print_flags(__entry->flags, "|", XFS_LI_FLAGS))
+)
+
+#define DEFINE_LOG_ITEM_EVENT(name) \
+DEFINE_EVENT(xfs_log_item_class, name, \
+        TP_PROTO(struct xfs_log_item *lip), \
+        TP_ARGS(lip))
+DEFINE_LOG_ITEM_EVENT(xfs_ail_push);
+DEFINE_LOG_ITEM_EVENT(xfs_ail_pushbuf);
+DEFINE_LOG_ITEM_EVENT(xfs_ail_pushbuf_pinned);
+DEFINE_LOG_ITEM_EVENT(xfs_ail_pinned);
+DEFINE_LOG_ITEM_EVENT(xfs_ail_locked);
+
+
 DECLARE_EVENT_CLASS(xfs_file_class,
         TP_PROTO(struct xfs_inode *ip, size_t count, loff_t offset, int flags),
         TP_ARGS(ip, count, offset, flags),
diff --git a/fs/xfs/xfs_trans_ail.c b/fs/xfs/xfs_trans_ail.c
index 4e3f9bbe0141..ed9252bcdac9 100644
--- a/fs/xfs/xfs_trans_ail.c
+++ b/fs/xfs/xfs_trans_ail.c
@@ -26,6 +26,7 @@
 #include "xfs_ag.h"
 #include "xfs_mount.h"
 #include "xfs_trans_priv.h"
+#include "xfs_trace.h"
 #include "xfs_error.h"
 
 #ifdef DEBUG
@@ -425,14 +426,18 @@ xfsaild_push(
                 switch (lock_result) {
                 case XFS_ITEM_SUCCESS:
                         XFS_STATS_INC(xs_push_ail_success);
+                        trace_xfs_ail_push(lip);
+
                         IOP_PUSH(lip);
                         ailp->xa_last_pushed_lsn = lsn;
                         break;
 
                 case XFS_ITEM_PUSHBUF:
                         XFS_STATS_INC(xs_push_ail_pushbuf);
+                        trace_xfs_ail_pushbuf(lip);
 
                         if (!IOP_PUSHBUF(lip)) {
+                                trace_xfs_ail_pushbuf_pinned(lip);
                                 stuck++;
                                 ailp->xa_log_flush++;
                         } else {
@@ -443,12 +448,15 @@ xfsaild_push(
 
                 case XFS_ITEM_PINNED:
                         XFS_STATS_INC(xs_push_ail_pinned);
+                        trace_xfs_ail_pinned(lip);
+
                         stuck++;
                         ailp->xa_log_flush++;
                         break;
 
                 case XFS_ITEM_LOCKED:
                         XFS_STATS_INC(xs_push_ail_locked);
+                        trace_xfs_ail_locked(lip);
                         stuck++;
                         break;