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authorSunil Mushran <sunil.mushran@oracle.com>2008-12-16 15:49:22 -0800
committerMark Fasheh <mfasheh@suse.com>2009-01-05 08:40:35 -0800
commitb0d4f817ba5de8adb875ace594554a96d7737710 (patch)
tree2e64d3240d6ad879c4ffa1c01ca1696abf3bb2fb /samples
parentd4f7e650e55af6b235871126f747da88600e8040 (diff)
ocfs2/dlm: Fix race in adding/removing lockres' to/from the tracking list
This patch adds a new lock, dlm->tracking_lock, to protect adding/removing lockres' to/from the dlm->tracking_list. We were previously using dlm->spinlock for the same, but that proved inadequate as we could be freeing a lockres from a context that did not hold that lock. As the new lock only protects this list, we can explicitly take it when removing the lockres from the tracking list. This bug was exposed when testing multiple processes concurrently flock() the same file. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
Diffstat (limited to 'samples')
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