diff options
| author |   Jinshan Xiong <jinshan.xiong@intel.com> | 2014-04-27 13:07:03 -0400 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-04-27 10:31:00 -0700 |
| commit | 8d67c821d96c8cfaa2ae05f346f1b2a07f0c15ec (patch) | |
| tree | 487786c68fe411be1ed3a88d68911cce06adc963 /scripts | |
| parent | staging/lustre/lloop: avoid panic during blockdev_info (diff) | |
staging/lustre/clio: Solve a race in cl_lock_put
It's not atomic to check the last reference and state of cl_lock
in cl_lock_put(). This can cause a problem that an using lock is
freed, if the process is preempted between atomic_dec_and_test()
and (lock->cll_state == CLS_FREEING).
This problem can be solved by holding a refcount by coh_locks. In
this case, it can be sure that if the lock refcount reaches zero,
nobody else can have any chance to use it again.
Signed-off-by: Jinshan Xiong <jinshan.xiong@intel.com>
Reviewed-on: http://review.whamcloud.com/9881
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-4558
Reviewed-by: Bobi Jam <bobijam@gmail.com>
Reviewed-by: Lai Siyao <lai.siyao@intel.com>
Signed-off-by: Oleg Drokin <oleg.drokin@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'scripts')
0 files changed, 0 insertions, 0 deletions