Hi,
I am trying to understand and change the network buffering that is being
used by Remus, the HA solution present in Xen. From what i understood from reading the code, Remus
calls the postsuspend method of the BufferedNIC after it suspends the
domain that sends TC_PLUG_CHECKPOINT message and start the buffering and
then calls the commit method of BufferedNIC after it gets the
acknowledgement that sends the TC_PLUG_RELEASE message and releases the
buffered packets. I have the following doubts
1) How does remus ensure that the packets gets buffered for an entire epoch ?
2) If i comment out the lines in the "postsuspend" and "commit" lines of
the BufferedNIC class that send the TC_PLUG_CHECKPOINT and
TC_PLUG_RELEASE, i see that all the network packets are being buffered
and i cannot ping the Remus-protected VM at all. Where is the packet
buffering happen if i comment out these 2 lines ?
Thanking you,
Rahul.
