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authorDave Chinner <dchinner@redhat.com>2010-03-08 11:24:07 +1100
committerAlex Elder <aelder@sgi.com>2010-05-19 09:58:08 -0500
commit4aaf15d1aa9673dd2cc45c48957c946cb4aa2694 (patch)
treeaec24df27ca9cde2d359b77f9ac97f8ad44a1baa /fs
parent43f5efc5b59db1b66e39fe9fdfc4ba6a27152afa (diff)
xfs: Add inode pin counts to traces
We don't record pin counts in inode events right now, and this makes it difficult to track down problems related to pinning inodes. Add the pin count to the inode trace class and add trace events for pinning and unpinning inodes. Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'fs')
-rw-r--r--fs/xfs/linux-2.6/xfs_trace.h9
-rw-r--r--fs/xfs/xfs_inode.c2
-rw-r--r--fs/xfs/xfs_inode_item.c2
3 files changed, 12 insertions, 1 deletions
diff --git a/fs/xfs/linux-2.6/xfs_trace.h b/fs/xfs/linux-2.6/xfs_trace.h
index fcaa62f0799..65371859c75 100644
--- a/fs/xfs/linux-2.6/xfs_trace.h
+++ b/fs/xfs/linux-2.6/xfs_trace.h
@@ -562,18 +562,21 @@ DECLARE_EVENT_CLASS(xfs_inode_class,
__field(dev_t, dev)
__field(xfs_ino_t, ino)
__field(int, count)
+ __field(int, pincount)
__field(unsigned long, caller_ip)
),
TP_fast_assign(
__entry->dev = VFS_I(ip)->i_sb->s_dev;
__entry->ino = ip->i_ino;
__entry->count = atomic_read(&VFS_I(ip)->i_count);
+ __entry->pincount = atomic_read(&ip->i_pincount);
__entry->caller_ip = caller_ip;
),
- TP_printk("dev %d:%d ino 0x%llx count %d caller %pf",
+ TP_printk("dev %d:%d ino 0x%llx count %d pincount %d caller %pf",
MAJOR(__entry->dev), MINOR(__entry->dev),
__entry->ino,
__entry->count,
+ __entry->pincount,
(char *)__entry->caller_ip)
)
@@ -583,6 +586,10 @@ DEFINE_EVENT(xfs_inode_class, name, \
TP_ARGS(ip, caller_ip))
DEFINE_INODE_EVENT(xfs_ihold);
DEFINE_INODE_EVENT(xfs_irele);
+DEFINE_INODE_EVENT(xfs_inode_pin);
+DEFINE_INODE_EVENT(xfs_inode_unpin);
+DEFINE_INODE_EVENT(xfs_inode_unpin_nowait);
+
/* the old xfs_itrace_entry tracer - to be replaced by s.th. in the VFS */
DEFINE_INODE_EVENT(xfs_inode);
#define xfs_itrace_entry(ip) \
diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
index 0ffd5644704..8cd6e8d8fe9 100644
--- a/fs/xfs/xfs_inode.c
+++ b/fs/xfs/xfs_inode.c
@@ -2449,6 +2449,8 @@ xfs_iunpin_nowait(
{
ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_ILOCK_SHARED));
+ trace_xfs_inode_unpin_nowait(ip, _RET_IP_);
+
/* Give the log a push to start the unpinning I/O */
xfs_log_force_lsn(ip->i_mount, ip->i_itemp->ili_last_lsn, 0);
diff --git a/fs/xfs/xfs_inode_item.c b/fs/xfs/xfs_inode_item.c
index 32e4188411c..03471757bc8 100644
--- a/fs/xfs/xfs_inode_item.c
+++ b/fs/xfs/xfs_inode_item.c
@@ -543,6 +543,7 @@ xfs_inode_item_pin(
{
ASSERT(xfs_isilocked(iip->ili_inode, XFS_ILOCK_EXCL));
+ trace_xfs_inode_pin(iip->ili_inode, _RET_IP_);
atomic_inc(&iip->ili_inode->i_pincount);
}
@@ -561,6 +562,7 @@ xfs_inode_item_unpin(
{
struct xfs_inode *ip = iip->ili_inode;
+ trace_xfs_inode_unpin(ip, _RET_IP_);
ASSERT(atomic_read(&ip->i_pincount) > 0);
if (atomic_dec_and_test(&ip->i_pincount))
wake_up(&ip->i_ipin_wait);