[LU-13020] ko2iblnd tuning

• Type: Bug
• Resolution: Cannot Reproduce
• Priority: Critical
• Affects Version/s: Lustre 2.12.2
• Severity: 2
• Assignee: Amir Shehata (Inactive)
• Reporter: Mahmoud Hanafi

Description

We have been setting ko2iblnd timeout = 150 (default of 50) for our cluster. From reading the code this is no longer being used and instead lnet_lnd_timeout is used.

For example in kiblnd_queue_tx_locked

    timeout_ns = lnet_get_lnd_timeout() * NSEC_PER_SEC;
    tx->tx_queued = 1;
    tx->tx_deadline = ktime_add_ns(ktime_get(), timeout_ns);

and
lnet_get_lnd_timeout() returns the new default of 5. Does this mean we went from 150 to 5!

In the documentation it says that lnet_lnd_timeout derived from lnet_transaction_timeout and retry_count. But that is not getting set for tx->tx_deadline.

Am I reading the code correctly?

Issue Links

• is related to: LU-13145 LNet Health: increase transaction timeout