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b2ce397 Revert "xfs: fix filesystsem freeze race in xfs_trans_alloc"
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commit b2ce39740066604288876c752d8170b3b17a21aa
Author: Alex Elder <aelder@xxxxxxx>
Date: Mon Jul 11 09:51:44 2011 -0500
Revert "xfs: fix filesystsem freeze race in xfs_trans_alloc"
This reverts commit 7a249cf83da1813cfa71cfe1e265b40045eceb47.
That commit created a situation that could lead to a filesystem
hang. As Dave Chinner pointed out, xfs_trans_alloc() could hold a
reference to m_active_trans (i.e., keep it non-zero) and then wait
for SB_FREEZE_TRANS to complete. Meanwhile a filesystem freeze
request could set SB_FREEZE_TRANS and then wait for m_active_trans
to drop to zero. Nobody benefits from this sequence of events...
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
Signed-off-by: Alex Elder <aelder@xxxxxxx>
-----------------------------------------------------------------------
Summary of changes:
fs/xfs/xfs_fsops.c | 2 +-
fs/xfs/xfs_iomap.c | 3 ++-
fs/xfs/xfs_mount.c | 14 +++++++-------
fs/xfs/xfs_trans.c | 27 +++++++++++++++++----------
fs/xfs/xfs_trans.h | 10 ++--------
5 files changed, 29 insertions(+), 27 deletions(-)
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