[openib-general] APM support in openib stack

[Tang, Changqing]

Thanks, In situation that path 1 is primary, path 2 is alternate, when
path 1 failed, traffic migrates to path 2. Now we can think that path 2
is primary, but there is no alternate path.

Is there a way (not limited to cm) to know that path 1 is back again and
reload it as the new alternate path ? If path 1 is down, we can not set
it as alternate path, right ?

If we can not bring a path back on fly, the usage of APM is limited.

--CQ


-----Original Message-----
From: Sean Hefty [mailto:mshefty at ichips.intel.com] 
Sent: Wednesday, October 25, 2006 11:41 AM
To: Tang, Changqing
Cc: somenath at veritas.com; Venkatesh Babu; openib-general at openib.org
Subject: Re: [openib-general] APM support in openib stack

> How do you know that the old path is back ? Do you have a notification

> handler called, or you need to query periodically ?

The cm doesn't know that it's back.  It records the original path used
when sending the REQ and uses that same path for all future messages.

- Sean