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| author | Theodore Ts'o <tytso@mit.edu> | 2008-10-06 02:50:06 +0200 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2008-10-06 02:50:06 +0200 |
| commit | ede86cc473defab74d778aeac14b19f43129d4d1 (patch) | |
| tree | 19da8009accf1737171f5949413e46a9086d5fdc /fs/ext4 | |
| parent | jbd2: abort instead of waiting for nonexistent transaction (diff) | |
| download | linux-ede86cc473defab74d778aeac14b19f43129d4d1.tar.xz linux-ede86cc473defab74d778aeac14b19f43129d4d1.zip | |
ext4: Add debugging markers that can be used by systemtap
This debugging markers are designed to debug problems such as the
random filesystem latency problems reported by Arjan.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'fs/ext4')
| -rw-r--r-- | fs/ext4/fsync.c | 5 | ||||
| -rw-r--r-- | fs/ext4/super.c | 2 |
2 files changed, 7 insertions, 0 deletions
diff --git a/fs/ext4/fsync.c b/fs/ext4/fsync.c index c37d1e86f51a..5afe4370840b 100644 --- a/fs/ext4/fsync.c +++ b/fs/ext4/fsync.c @@ -28,6 +28,7 @@ #include <linux/writeback.h> #include <linux/jbd2.h> #include <linux/blkdev.h> +#include <linux/marker.h> #include "ext4.h" #include "ext4_jbd2.h" @@ -51,6 +52,10 @@ int ext4_sync_file(struct file *file, struct dentry *dentry, int datasync) J_ASSERT(ext4_journal_current_handle() == NULL); + trace_mark(ext4_sync_file, "dev %s datasync %d ino %ld parent %ld", + inode->i_sb->s_id, datasync, inode->i_ino, + dentry->d_parent->d_inode->i_ino); + /* * data=writeback: * The caller's filemap_fdatawrite()/wait will sync the data. diff --git a/fs/ext4/super.c b/fs/ext4/super.c index dfcd41fafb9f..9c0214689de0 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -35,6 +35,7 @@ #include <linux/quotaops.h> #include <linux/seq_file.h> #include <linux/proc_fs.h> +#include <linux/marker.h> #include <linux/log2.h> #include <linux/crc16.h> #include <asm/uaccess.h> @@ -2951,6 +2952,7 @@ static int ext4_sync_fs(struct super_block *sb, int wait) { tid_t target; + trace_mark(ext4_sync_fs, "dev %s wait %d", sb->s_id, wait); sb->s_dirt = 0; if (jbd2_journal_start_commit(EXT4_SB(sb)->s_journal, &target)) { if (wait) |