“Mark Lord reported a problem with the upcoming 2.6.17 kernel
being unable to access www.everymac.com. He detailed a series of
tests that isolated the problem down to a recent changeset titled,
‘set default max buffers from memory pool size,’ which goes on to
explain, ‘this patch sets the maximum TCP buffer sizes (available
to automatic buffer tuning, not to setsockopt) based on the TCP
memory pool size. The maximum sndbuf and rcvbuf each will be up to
4 MB, but no more than 1/128 of the memory pressure threshold.’
John Heffner explained that somewhere between Mark’s server and the
webserver was a broken box that needs to be fixed, ‘in the
meantime, disabling window scaling will work around the problem for
you…'”