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xfs: Add inode pin counts to traces

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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>
This commit is contained in:
Dave Chinner 2010-03-08 11:24:07 +11:00 • committed by Alex Elder
parent 43f5efc5b5
commit 4aaf15d1aa
3 changed files with 12 additions and 1 deletions
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2
fs/xfs/xfs_inode_item.c
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@ -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);