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Date: Tue, 2 Mar 2010 13:18:22 -0500
From: Theodore Ts'o <tytso@....edu>
To: Ext4 Developers List <linux-ext4@...r.kernel.org>
Cc: Theodore Ts'o <tytso@....edu>
Subject: [PATCH 05/28] ext4: Add new tracepoints to debug delayed allocation space functions
Add tracepoints for ext4_da_reserve_space(),
ext4_da_update_reserve_space(), and ext4_da_release_space().
Signed-off-by: "Theodore Ts'o" <tytso@....edu>
---
fs/ext4/inode.c | 2 +
include/trace/events/ext4.h | 101 +++++++++++++++++++++++++++++++++++++++++++
2 files changed, 103 insertions(+), 0 deletions(-)
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 3e8afd9..1a3d7b2 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -1061,6 +1061,7 @@ void ext4_da_update_reserve_space(struct inode *inode,
int mdb_free = 0, allocated_meta_blocks = 0;
spin_lock(&ei->i_block_reservation_lock);
+ trace_ext4_da_update_reserve_space(inode, used);
if (unlikely(used > ei->i_reserved_data_blocks)) {
ext4_msg(inode->i_sb, KERN_NOTICE, "%s: ino %lu, used %d "
"with only %d reserved data blocks\n",
@@ -1846,6 +1847,7 @@ repeat:
spin_lock(&ei->i_block_reservation_lock);
md_reserved = ei->i_reserved_meta_blocks;
md_needed = ext4_calc_metadata_amount(inode, lblock);
+ trace_ext4_da_reserve_space(inode, md_needed);
spin_unlock(&ei->i_block_reservation_lock);
/*
diff --git a/include/trace/events/ext4.h b/include/trace/events/ext4.h
index d0b6cd3..2aa6aa3 100644
--- a/include/trace/events/ext4.h
+++ b/include/trace/events/ext4.h
@@ -874,6 +874,107 @@ TRACE_EVENT(ext4_forget,
__entry->mode, __entry->is_metadata, __entry->block)
);
+TRACE_EVENT(ext4_da_update_reserve_space,
+ TP_PROTO(struct inode *inode, int used_blocks),
+
+ TP_ARGS(inode, used_blocks),
+
+ TP_STRUCT__entry(
+ __field( dev_t, dev )
+ __field( ino_t, ino )
+ __field( umode_t, mode )
+ __field( __u64, i_blocks )
+ __field( int, used_blocks )
+ __field( int, reserved_data_blocks )
+ __field( int, reserved_meta_blocks )
+ __field( int, allocated_meta_blocks )
+ ),
+
+ TP_fast_assign(
+ __entry->dev = inode->i_sb->s_dev;
+ __entry->ino = inode->i_ino;
+ __entry->mode = inode->i_mode;
+ __entry->i_blocks = inode->i_blocks;
+ __entry->used_blocks = used_blocks;
+ __entry->reserved_data_blocks = EXT4_I(inode)->i_reserved_data_blocks;
+ __entry->reserved_meta_blocks = EXT4_I(inode)->i_reserved_meta_blocks;
+ __entry->allocated_meta_blocks = EXT4_I(inode)->i_allocated_meta_blocks;
+ ),
+
+ TP_printk("dev %s ino %lu mode 0%o i_blocks %llu used_blocks %d reserved_data_blocks %d reserved_meta_blocks %d allocated_meta_blocks %d",
+ jbd2_dev_to_name(__entry->dev), (unsigned long) __entry->ino,
+ __entry->mode, (unsigned long long) __entry->i_blocks,
+ __entry->used_blocks, __entry->reserved_data_blocks,
+ __entry->reserved_meta_blocks, __entry->allocated_meta_blocks)
+);
+
+TRACE_EVENT(ext4_da_reserve_space,
+ TP_PROTO(struct inode *inode, int md_needed),
+
+ TP_ARGS(inode, md_needed),
+
+ TP_STRUCT__entry(
+ __field( dev_t, dev )
+ __field( ino_t, ino )
+ __field( umode_t, mode )
+ __field( __u64, i_blocks )
+ __field( int, md_needed )
+ __field( int, reserved_data_blocks )
+ __field( int, reserved_meta_blocks )
+ ),
+
+ TP_fast_assign(
+ __entry->dev = inode->i_sb->s_dev;
+ __entry->ino = inode->i_ino;
+ __entry->mode = inode->i_mode;
+ __entry->i_blocks = inode->i_blocks;
+ __entry->md_needed = md_needed;
+ __entry->reserved_data_blocks = EXT4_I(inode)->i_reserved_data_blocks;
+ __entry->reserved_meta_blocks = EXT4_I(inode)->i_reserved_meta_blocks;
+ ),
+
+ TP_printk("dev %s ino %lu mode 0%o i_blocks %llu md_needed %d reserved_data_blocks %d reserved_meta_blocks %d",
+ jbd2_dev_to_name(__entry->dev), (unsigned long) __entry->ino,
+ __entry->mode, (unsigned long long) __entry->i_blocks,
+ __entry->md_needed, __entry->reserved_data_blocks,
+ __entry->reserved_meta_blocks)
+);
+
+TRACE_EVENT(ext4_da_release_space,
+ TP_PROTO(struct inode *inode, int freed_blocks),
+
+ TP_ARGS(inode, freed_blocks),
+
+ TP_STRUCT__entry(
+ __field( dev_t, dev )
+ __field( ino_t, ino )
+ __field( umode_t, mode )
+ __field( __u64, i_blocks )
+ __field( int, freed_blocks )
+ __field( int, reserved_data_blocks )
+ __field( int, reserved_meta_blocks )
+ __field( int, allocated_meta_blocks )
+ ),
+
+ TP_fast_assign(
+ __entry->dev = inode->i_sb->s_dev;
+ __entry->ino = inode->i_ino;
+ __entry->mode = inode->i_mode;
+ __entry->i_blocks = inode->i_blocks;
+ __entry->freed_blocks = freed_blocks;
+ __entry->reserved_data_blocks = EXT4_I(inode)->i_reserved_data_blocks;
+ __entry->reserved_meta_blocks = EXT4_I(inode)->i_reserved_meta_blocks;
+ __entry->allocated_meta_blocks = EXT4_I(inode)->i_allocated_meta_blocks;
+ ),
+
+ TP_printk("dev %s ino %lu mode 0%o i_blocks %llu freed_blocks %d reserved_data_blocks %d reserved_meta_blocks %d allocated_meta_blocks %d",
+ jbd2_dev_to_name(__entry->dev), (unsigned long) __entry->ino,
+ __entry->mode, (unsigned long long) __entry->i_blocks,
+ __entry->freed_blocks, __entry->reserved_data_blocks,
+ __entry->reserved_meta_blocks, __entry->allocated_meta_blocks)
+);
+
+
#endif /* _TRACE_EXT4_H */
/* This part must be outside protection */
--
1.6.6.1.1.g974db.dirty
--
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