> -----Original Message----- > From: Dan Magenheimer [mailto:dan.magenheimer@xxxxxxxxxx] > Sent: July 05, 2011 9:06 PM > To: Loke, Chetan; netdev@xxxxxxxxxxxxxxx > Cc: Konrad Wilk; linux-mm > Subject: RE: [RFC] non-preemptible kernel socket for RAMster > > > From: Loke, Chetan [mailto:Chetan.Loke@xxxxxxxxxxxx] > > Subject: RE: [RFC] non-preemptible kernel socket for RAMster > > > > > From: Dan Magenheimer [mailto:dan.magenheimer@xxxxxxxxxx] > > > How often are you going to re-size your remote-SWAP? > > is "as often as the working set changes on any machine in the > cluster", meaning *constantly*, entirely dynamically! How > about a more specific example: Suppose you have 2 machines, > each with 8GB of memory. 99% of the time each machine is > chugging along just fine and doesn't really need more than 4GB, > and may even use less than 1GB a large part of the time. > But very now and then, one of the machines randomly needs > 9GB, 10GB, maybe even 12GB of memory. This would normally > result in swapping. (Most system administrators won't even > have this much information... they'll just know they are > seeing swapping and decide they need to buy more RAM.) > Ok, I understand there is interest in implementing 'remote-volatile-ballooning-variant' but how do you pick a remote candidate(hypervisor)? Let's say, memory could be available on remote system but what if the remote-p{NIC,CPU} is overloaded? Sure, sysadmins won't have this info because this so dynamic(and it's quite possible as you mentioned above). But does the trans-remote-API know about this resource-availability before opening a remote-channel? Stressing the remote-p{NIC/CPU} might trick hypervisor-vmotion-plugin to vmotion VM[s] to another hypervisor. How is trans-remote-API integrating with remote/global vmotion policies to avoid this false vmotion? > Dan Chetan Loke -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href