[LU-14979] LNet: add tunable parameter to control max recovery interval duration

• Type: Improvement
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.16.0
• Labels: lnet lnet-health
• Assignee: Cyril Bordage
• Reporter: Serguei Smirnov

Description

Currently implemented recovery ping mechanism increases the next scheduled recovery ping attempt timeout exponentially (base 2) and limits the timeout at 900 seconds. This hard-coded value appears to be too high in many cases. Introduce a tunable parameter that can be used to limit the recovery ping timeout and come up with a reasonable default.