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| author | tsutomu.owa@toshiba.co.jp <tsutomu.owa@toshiba.co.jp> | 2017-09-15 22:17:23 +0300 |
|---|---|---|
| committer | David Teigland <teigland@redhat.com> | 2017-09-25 20:45:21 +0300 |
| commit | 294e7e458763dc1d229cbbe7147a6034bfc6e39a (patch) | |
| tree | 5b5d3cda6d51e5f5c8a4817b7f4446a2c181515f /fs/dlm/lowcomms.c | |
| parent | 173a31fe2b23b3ccc45d0b70edb225b1d836c31d (diff) | |
| download | linux-294e7e458763dc1d229cbbe7147a6034bfc6e39a.tar.xz | |
DLM: fix conversion deadlock when DLM_LKF_NODLCKWT flag is set
When the DLM_LKF_NODLCKWT flag was set, even if conversion deadlock
was detected, the caller of can_be_granted() was unknown.
We change the behavior of can_be_granted() and change it to detect
conversion deadlock regardless of whether the DLM_LKF_NODLCKWT flag
is set or not. And depending on whether the DLM_LKF_NODLCKWT flag
is set or not, we change the behavior at the caller of can_be_granted().
This fix has no effect except when using DLM_LKF_NODLCKWT flag.
Currently, ocfs2 uses the DLM_LKF_NODLCKWT flag and does not expect a
cancel operation from conversion deadlock when calling dlm_lock().
ocfs2 is implemented to perform a cancel operation by requesting
BASTs (callback).
Signed-off-by: Tadashi Miyauchi <miyauchi@toshiba-tops.co.jp>
Signed-off-by: Tsutomu Owa <tsutomu.owa@toshiba.co.jp>
Signed-off-by: David Teigland <teigland@redhat.com>
Diffstat (limited to 'fs/dlm/lowcomms.c')
0 files changed, 0 insertions, 0 deletions