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authorEric Sandeen <sandeen@redhat.com>2010-10-27 21:30:07 -0400
committerTheodore Ts'o <tytso@mit.edu>2010-10-27 21:30:07 -0400
commit3e1e5f501632460184a98237d5460c521510535e (patch)
tree9bb5006c9bcb1651f9c447869f4e90deb116e6e8 /include
parent4d5476164a052e80d4ef430e368e76dbde96801f (diff)
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ext4: don't use ext4_allocation_contexts for tracing
Many tracepoints were populating an ext4_allocation_context to pass in, but this requires a slab allocation even when tracepoints are off. In fact, 4 of 5 of these allocations were only for tracing. In addition, we were only using a small fraction of the 144 bytes of this structure for this purpose. We can do away with all these alloc/frees of the ac and simply pass in the bits we care about, instead. I tested this by turning on tracing and running through xfstests on x86_64. I did not actually do anything with the trace output, however. Signed-off-by: Eric Sandeen <sandeen@redhat.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'include')
-rw-r--r--include/trace/events/ext4.h51
1 files changed, 29 insertions, 22 deletions
diff --git a/include/trace/events/ext4.h b/include/trace/events/ext4.h
index fbdfa3a6bbd..b5f4938d612 100644
--- a/include/trace/events/ext4.h
+++ b/include/trace/events/ext4.h
@@ -396,11 +396,11 @@ DEFINE_EVENT(ext4__mb_new_pa, ext4_mb_new_group_pa,
TRACE_EVENT(ext4_mb_release_inode_pa,
TP_PROTO(struct super_block *sb,
- struct ext4_allocation_context *ac,
+ struct inode *inode,
struct ext4_prealloc_space *pa,
unsigned long long block, unsigned int count),
- TP_ARGS(sb, ac, pa, block, count),
+ TP_ARGS(sb, inode, pa, block, count),
TP_STRUCT__entry(
__field( dev_t, dev )
@@ -412,8 +412,7 @@ TRACE_EVENT(ext4_mb_release_inode_pa,
TP_fast_assign(
__entry->dev = sb->s_dev;
- __entry->ino = (ac && ac->ac_inode) ?
- ac->ac_inode->i_ino : 0;
+ __entry->ino = inode->i_ino;
__entry->block = block;
__entry->count = count;
),
@@ -425,10 +424,9 @@ TRACE_EVENT(ext4_mb_release_inode_pa,
TRACE_EVENT(ext4_mb_release_group_pa,
TP_PROTO(struct super_block *sb,
- struct ext4_allocation_context *ac,
struct ext4_prealloc_space *pa),
- TP_ARGS(sb, ac, pa),
+ TP_ARGS(sb, pa),
TP_STRUCT__entry(
__field( dev_t, dev )
@@ -779,47 +777,56 @@ TRACE_EVENT(ext4_mballoc_prealloc,
);
DECLARE_EVENT_CLASS(ext4__mballoc,
- TP_PROTO(struct ext4_allocation_context *ac),
+ TP_PROTO(struct super_block *sb,
+ struct inode *inode,
+ ext4_group_t group,
+ ext4_grpblk_t start,
+ ext4_grpblk_t len),
- TP_ARGS(ac),
+ TP_ARGS(sb, inode, group, start, len),
TP_STRUCT__entry(
__field( dev_t, dev )
__field( ino_t, ino )
- __field( __u32, result_logical )
__field( int, result_start )
__field( __u32, result_group )
__field( int, result_len )
),
TP_fast_assign(
- __entry->dev = ac->ac_sb->s_dev;
- __entry->ino = ac->ac_inode ?
- ac->ac_inode->i_ino : 0;
- __entry->result_logical = ac->ac_b_ex.fe_logical;
- __entry->result_start = ac->ac_b_ex.fe_start;
- __entry->result_group = ac->ac_b_ex.fe_group;
- __entry->result_len = ac->ac_b_ex.fe_len;
+ __entry->dev = sb->s_dev;
+ __entry->ino = inode ? inode->i_ino : 0;
+ __entry->result_start = start;
+ __entry->result_group = group;
+ __entry->result_len = len;
),
- TP_printk("dev %s inode %lu extent %u/%d/%u@%u ",
+ TP_printk("dev %s inode %lu extent %u/%d/%u ",
jbd2_dev_to_name(__entry->dev), (unsigned long) __entry->ino,
__entry->result_group, __entry->result_start,
- __entry->result_len, __entry->result_logical)
+ __entry->result_len)
);
DEFINE_EVENT(ext4__mballoc, ext4_mballoc_discard,
- TP_PROTO(struct ext4_allocation_context *ac),
+ TP_PROTO(struct super_block *sb,
+ struct inode *inode,
+ ext4_group_t group,
+ ext4_grpblk_t start,
+ ext4_grpblk_t len),
- TP_ARGS(ac)
+ TP_ARGS(sb, inode, group, start, len)
);
DEFINE_EVENT(ext4__mballoc, ext4_mballoc_free,
- TP_PROTO(struct ext4_allocation_context *ac),
+ TP_PROTO(struct super_block *sb,
+ struct inode *inode,
+ ext4_group_t group,
+ ext4_grpblk_t start,
+ ext4_grpblk_t len),
- TP_ARGS(ac)
+ TP_ARGS(sb, inode, group, start, len)
);
TRACE_EVENT(ext4_forget,