[PATCH-v4 4/7] vfs: add lazytime tracepoints for better debugging

Theodore Ts'o
2014-11-26T10:24:08Z

Signed-off-by: Theodore Ts'o <tytso@mit.edu>
---
fs/fs-writeback.c | 1 +
fs/inode.c | 5 +++++
2 files changed, 6 insertions(+)

diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c
index 529480a..3d87174 100644
--- a/fs/fs-writeback.c
+++ b/fs/fs-writeback.c
@@ -27,6 +27,7 @@
#include <linux/backing-dev.h>
#include <linux/tracepoint.h>
#include <linux/device.h>
+#include <trace/events/fs.h>
#include "internal.h"

/*
diff --git a/fs/inode.c b/fs/inode.c
index 37c0429..b2fea60 100644
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -20,6 +20,9 @@
#include <linux/list_lru.h>
#include "internal.h"

+#define CREATE_TRACE_POINTS
+#include <trace/events/fs.h>
+
/*
* Inode locking rules:
*
@@ -1443,6 +1446,7 @@ retry:
inode->i_op->write_time(inode);
else if (inode->i_sb->s_op->write_inode)
mark_inode_dirty_sync(inode);
+ trace_fs_lazytime_iput(inode);
goto retry;
}
iput_final(inode);
@@ -1561,6 +1565,7 @@ static int update_time(struct inode *inode, struct timespec *time, int flags)
inode->i_ts_dirty_day = days_since_boot;
spin_unlock(&inode->i_lock);
inode_requeue_dirtytime(inode);
+ trace_fs_lazytime_defer(inode);
return 0;
}
force_dirty:
--
2.1.0