xfs: xfs_iomap_prealloc_size() tracepoint
Add a tracepoint to provide some feedback on preallocation size
calculation.
Signed-off-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Mark Tinguely <tinguely@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
diff --git a/fs/xfs/xfs_trace.h b/fs/xfs/xfs_trace.h
index 16a8129..aa4db33 100644
--- a/fs/xfs/xfs_trace.h
+++ b/fs/xfs/xfs_trace.h
@@ -619,6 +619,30 @@
(char *)__entry->caller_ip)
)
+TRACE_EVENT(xfs_iomap_prealloc_size,
+ TP_PROTO(struct xfs_inode *ip, xfs_fsblock_t blocks, int shift,
+ unsigned int writeio_blocks),
+ TP_ARGS(ip, blocks, shift, writeio_blocks),
+ TP_STRUCT__entry(
+ __field(dev_t, dev)
+ __field(xfs_ino_t, ino)
+ __field(xfs_fsblock_t, blocks)
+ __field(int, shift)
+ __field(unsigned int, writeio_blocks)
+ ),
+ TP_fast_assign(
+ __entry->dev = VFS_I(ip)->i_sb->s_dev;
+ __entry->ino = ip->i_ino;
+ __entry->blocks = blocks;
+ __entry->shift = shift;
+ __entry->writeio_blocks = writeio_blocks;
+ ),
+ TP_printk("dev %d:%d ino 0x%llx prealloc blocks %llu shift %d "
+ "m_writeio_blocks %u",
+ MAJOR(__entry->dev), MINOR(__entry->dev), __entry->ino,
+ __entry->blocks, __entry->shift, __entry->writeio_blocks)
+)
+
#define DEFINE_IREF_EVENT(name) \
DEFINE_EVENT(xfs_iref_class, name, \
TP_PROTO(struct xfs_inode *ip, unsigned long caller_ip), \