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authorChristoph Hellwig <hch@infradead.org>2010-06-24 11:50:22 +1000
committerAlex Elder <aelder@sgi.com>2010-07-26 13:16:43 -0500
commitd2e078c33c24f97411b0fdd7cd2173e68125e7e3 (patch)
tree596dafaa5f9f6336a62350a889926184a93a3850 /fs/xfs
parent807cbbdb438d172b87b380eebc1f1c1a5a3549b2 (diff)
xfs: some iget tracing cleanups / fixes
The xfs_iget_alloc/found tracepoints are a bit misnamed and misplaced. Rename them to xfs_iget_hit/xfs_iget_miss and move them to the beggining of the xfs_iget_cache_hit/miss functions. Add a new xfs_iget_reclaim_fail tracepoint for the case where we fail to re-initialize a VFS inode, and add a second instance of the xfs_iget_skip tracepoint for the case of a failed igrab() call. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Dave Chinner <dchinner@redhat.com>
Diffstat (limited to 'fs/xfs')
-rw-r--r--fs/xfs/linux-2.6/xfs_trace.h5
-rw-r--r--fs/xfs/xfs_iget.c8
2 files changed, 7 insertions, 6 deletions
diff --git a/fs/xfs/linux-2.6/xfs_trace.h b/fs/xfs/linux-2.6/xfs_trace.h
index 3f2eec28c70d..9efe368d38c7 100644
--- a/fs/xfs/linux-2.6/xfs_trace.h
+++ b/fs/xfs/linux-2.6/xfs_trace.h
@@ -561,8 +561,9 @@ DEFINE_EVENT(xfs_iget_class, name, \
TP_ARGS(ip))
DEFINE_IGET_EVENT(xfs_iget_skip);
DEFINE_IGET_EVENT(xfs_iget_reclaim);
-DEFINE_IGET_EVENT(xfs_iget_found);
-DEFINE_IGET_EVENT(xfs_iget_alloc);
+DEFINE_IGET_EVENT(xfs_iget_reclaim_fail);
+DEFINE_IGET_EVENT(xfs_iget_hit);
+DEFINE_IGET_EVENT(xfs_iget_miss);
DECLARE_EVENT_CLASS(xfs_inode_class,
TP_PROTO(struct xfs_inode *ip, unsigned long caller_ip),
diff --git a/fs/xfs/xfs_iget.c b/fs/xfs/xfs_iget.c
index 633cb331b9e9..75664d1b9f59 100644
--- a/fs/xfs/xfs_iget.c
+++ b/fs/xfs/xfs_iget.c
@@ -208,7 +208,7 @@ xfs_iget_cache_hit(
ip->i_flags &= ~XFS_INEW;
ip->i_flags |= XFS_IRECLAIMABLE;
__xfs_inode_set_reclaim_tag(pag, ip);
- trace_xfs_iget_reclaim(ip);
+ trace_xfs_iget_reclaim_fail(ip);
goto out_error;
}
@@ -223,6 +223,7 @@ xfs_iget_cache_hit(
} else {
/* If the VFS inode is being torn down, pause and try again. */
if (!igrab(inode)) {
+ trace_xfs_iget_skip(ip);
error = EAGAIN;
goto out_error;
}
@@ -230,6 +231,7 @@ xfs_iget_cache_hit(
/* We've got a live one. */
spin_unlock(&ip->i_flags_lock);
read_unlock(&pag->pag_ici_lock);
+ trace_xfs_iget_hit(ip);
}
if (lock_flags != 0)
@@ -238,7 +240,6 @@ xfs_iget_cache_hit(
xfs_iflags_clear(ip, XFS_ISTALE);
XFS_STATS_INC(xs_ig_found);
- trace_xfs_iget_found(ip);
return 0;
out_error:
@@ -271,7 +272,7 @@ xfs_iget_cache_miss(
if (error)
goto out_destroy;
- xfs_itrace_entry(ip);
+ trace_xfs_iget_miss(ip);
if ((ip->i_d.di_mode == 0) && !(flags & XFS_IGET_CREATE)) {
error = ENOENT;
@@ -317,7 +318,6 @@ xfs_iget_cache_miss(
write_unlock(&pag->pag_ici_lock);
radix_tree_preload_end();
- trace_xfs_iget_alloc(ip);
*ipp = ip;
return 0;