Re: xennet0: rx no cluster

[Brian Buhrow <buhrow%nfbcal.org@localhost>]

	Hello.  This is a known issue.  The problem is the xennet(4) driver on the domu is trying
to allocate receive buffers from the kernel pool and the allocations fail.  If you're not
actually running out of kernel pool memory, this error is benign and the network will function
once the transient error is corrected. If your network ceases to function after these errors
occur, it's possible you are actually runing out of kernel memory, as opposed to experiencing 
momentary memory pressure.  
	I worked on a few patches a while ago with some help from Chuck Silvers, but I wasn't able
to completely solve the problem.  I'm running a 10.99.12 (Amd64) domu with 4G of ram and I have
vm.bufcache set to 20% and vm.filemax set to 10%.
I get occasional rx cluster failures, but I'm not getting hangs.

Hope that helps.
-Brian