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authorDave Chinner <david@fromorbit.com>2010-01-11 11:47:45 +0000
committerAlex Elder <aelder@sgi.com>2010-01-15 15:34:04 -0600
commitaed3bb90abaf0b42e8c8747e192f7bb97f445279 (patch)
tree4619214ed42821792b05f4417cb95bde90abb562 /fs/xfs/xfs_mount.c
parent1c1c6ebcf5284aee4910f3b906ac90c20e510c82 (diff)
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xfs: Reference count per-ag structures
Reference count the per-ag structures to ensure that we keep get/put pairs balanced. Assert that the reference counts are zero at unmount time to catch leaks. In future, reference counts will enable us to safely remove perag structures by allowing us to detect when they are no longer in use. Signed-off-by: Dave Chinner <david@fromorbit.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Alex Elder <aelder@sgi.com>
Diffstat (limited to 'fs/xfs/xfs_mount.c')
-rw-r--r--fs/xfs/xfs_mount.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c
index c04dd83..f241fec 100644
--- a/fs/xfs/xfs_mount.c
+++ b/fs/xfs/xfs_mount.c
@@ -215,6 +215,7 @@ xfs_free_perag(
for (agno = 0; agno < mp->m_sb.sb_agcount; agno++) {
spin_lock(&mp->m_perag_lock);
pag = radix_tree_delete(&mp->m_perag_tree, agno);
+ ASSERT(atomic_read(&pag->pag_ref) == 0);
spin_unlock(&mp->m_perag_lock);
ASSERT(pag);
kmem_free(pag->pagb_list);