Hi Sergei:This one looks small to me, as the tcp_{r,w}mem were count by bytes andI didn't think of server problem. I did run 3.3-rc0 kernel there
> limit were count by number of pages, so we need to shift PAGE_SHIFT.
> > As I can't reproduce this locally, in order to narrow down the problem,
> could you please help to check whether the issue were
> introduced/eliminated by commit 4acb4190 or 3dc43e3?
from the kvm tree (v3.2-10396-g05ef4c6):
commit 05ef4c60568ed1740f65bf66a76da30b19060119
Author: Michael S. Tsirkin<mst@xxxxxxxxxx>
Date: Wed Jan 18 20:07:09 2012 +0200
kvm: fix error handling for out of range irq
from git://git.kernel.org/pub/scm/virt/kvm/kvm.git
Updating to current vanilla 3.3-rc6 solved the problem.
Are you interested in digging that issue further to find commit
breaking the server?