Commit 19cb7e38 authored by Brian Foster's avatar Brian Foster Committed by Ben Myers
Browse files

xfs: xfs_iomap_prealloc_size() tracepoint 



Add a tracepoint to provide some feedback on preallocation size
calculation.

Signed-off-by: default avatarBrian Foster <bfoster@redhat.com>
Reviewed-by: default avatarMark Tinguely <tinguely@sgi.com>
Signed-off-by: default avatarBen Myers <bpm@sgi.com>
parent 76a4202a

fs/xfs/xfs_iomap.c

+3 −0
Original line number Diff line number Diff line
@@ -518,6 +518,9 @@ xfs_iomap_prealloc_size( 
	if (alloc_blocks < mp->m_writeio_blocks)

		alloc_blocks = mp->m_writeio_blocks;



	trace_xfs_iomap_prealloc_size(ip, alloc_blocks, shift,

				      mp->m_writeio_blocks);



	return alloc_blocks;

}

fs/xfs/xfs_trace.h

+24 −0
Original line number Diff line number Diff line
@@ -619,6 +619,30 @@ DECLARE_EVENT_CLASS(xfs_iref_class, 
		  (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), \