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| author | Brian Foster <bfoster@redhat.com> | 2013-03-18 10:51:48 -0400 |
|---|---|---|
| committer | Ben Myers <bpm@sgi.com> | 2013-03-22 16:07:56 -0500 |
| commit | 19cb7e3854c9afe2ee968cbdd92293ec09e43bf3 (patch) | |
| tree | ce82d40276e1d19571770f70d30ca49b1dbaa984 | |
| parent | 76a4202a388690e664668c4f668ee12d709100b3 (diff) | |
| download | linux-stable-19cb7e3854c9afe2ee968cbdd92293ec09e43bf3.tar.gz linux-stable-19cb7e3854c9afe2ee968cbdd92293ec09e43bf3.tar.bz2 linux-stable-19cb7e3854c9afe2ee968cbdd92293ec09e43bf3.zip | |
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>
| -rw-r--r-- | fs/xfs/xfs_iomap.c | 3 | ||||
| -rw-r--r-- | fs/xfs/xfs_trace.h | 24 |
2 files changed, 27 insertions, 0 deletions
diff --git a/fs/xfs/xfs_iomap.c b/fs/xfs/xfs_iomap.c index 0a530853b53d..8f8aaee7f379 100644 --- a/fs/xfs/xfs_iomap.c +++ b/fs/xfs/xfs_iomap.c @@ -518,6 +518,9 @@ check_writeio: 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; } diff --git a/fs/xfs/xfs_trace.h b/fs/xfs/xfs_trace.h index 16a812977eab..aa4db3307d36 100644 --- a/fs/xfs/xfs_trace.h +++ b/fs/xfs/xfs_trace.h @@ -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), \ |