Hi,
On Tue, Jun 6, 2023 at 5:56 PM Alexander Aring aahringo@redhat.com wrote:
This patch is fixing the current the callback handling if it's a nfs async lock request signaled if fl_lmops is set.
When using `stress-ng --fcntl 32` on the kernel log there are several messages like:
[11185.123533] dlm: dlm_plock_callback: vfs lock error 5d5127 file 000000002dd10f4d fl 000000007d13afae [11185.127135] dlm: dlm_plock_callback: vfs lock error 5d5127 file 000000002dd10f4d fl 00000000a6046fa0 [11185.142668] dlm: dlm_plock_callback: vfs lock error 5d5127 file 000000002dd10f4d fl 000000001d13dfa5
The commit 40595cdc93ed ("nfs: block notification on fs with its own ->lock") using only trylocks in an asynchronous polling behaviour. The behaviour before was however differently by evaluating F_SETLKW or F_SETLK and evaluating FL_SLEEP which was the case before commit 40595cdc93ed ("nfs: block notification on fs with its own ->lock"). This behaviour seems to be broken before. This patch will fix the behaviour for the special nfs case before commit 40595cdc93ed ("nfs: block notification on fs with its own ->lock").
There is still a TODO of solving the case when an nfs locking request got interrupted.
sorry, I will rephrase that.
- Alex