[PATCH] free temporary cursor in xfs_dialloc

From: Eric Sandeen <sandeen@sandeen.net>
To: xfs-oss <xfs@oss.sgi.com>
Cc: Christoph Hellwig <hch@infradead.org>, Alex Elder <aelder@sgi.com>
Subject: [PATCH] free temporary cursor in xfs_dialloc
Date: Tue, 13 Oct 2009 22:55:27 -0500	[thread overview]
Message-ID: <4AD54BAF.2050206@sandeen.net> (raw)

Commit bd169565993b39b9b4b102cdac8b13e0a259ce2f seems
to have a slight regression where this code path:

	if (!--searchdistance) {
		/*
		 * Not in range - save last search
		 * location and allocate a new inode
		 */
		...
		goto newino;
	}

doesn't free the temporary cursor (tcur) that got dup'd in
this function.

This leaks an item in the xfs_btree_cur zone, and it's caught
on module unload:

===========================================================
BUG xfs_btree_cur: Objects remaining on kmem_cache_close()
-----------------------------------------------------------

It seems like maybe a single free at the end of the function might
be cleaner, but for now put a del_cursor right in this code block
similar to the handling in the rest of the function.

Signed-off-by: Eric Sandeen <sandeen@sandeen.net>
---

diff --git a/fs/xfs/xfs_ialloc.c b/fs/xfs/xfs_ialloc.c
index ab64f3e..0785797 100644
--- a/fs/xfs/xfs_ialloc.c
+++ b/fs/xfs/xfs_ialloc.c
@@ -880,6 +880,7 @@ nextag:
 				 * Not in range - save last search
 				 * location and allocate a new inode
 				 */
+				xfs_btree_del_cursor(tcur, XFS_BTREE_NOERROR);
 				pag->pagl_leftrec = trec.ir_startino;
 				pag->pagl_rightrec = rec.ir_startino;
 				pag->pagl_pagino = pagino;

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