bitkeeper revision 1.1159.79.2 (414c1134FG1zvS9xwv2yPDvyS7W3ig)

bitkeeper revision 1.1159.79.2 (414c1134FG1zvS9xwv2yPDvyS7W3ig)

Linux scrubs memory before returnign it to Xen, or transferring it to
other domains (e.g., net backend driver). To avoid continual scrubbing during
network transfers, I allocate rx skbuffs from a dedicated slab cache. Pages
only neded to be scrubbed on entry to the cache, which should be ratehr more
occasional than allocs/frees.
Finally, scrubbing can be entirely disabled via a config option under the
'XEN' menu in the 2.4 and 2.6 kernel configurators.