On Wed, 18 Nov 2015 12:07:54 +0000 "Xie, Huawei" <huawei.xie at intel.com> wrote:
> >>> The kernel fills new allocated (huge) pages with zeros. > >>> DPDK just has to touch the pages to trigger the allocation. > I think we shouldn't reply on the assumption that kernel has zeroed the > memory. Kernel zeroes the memory mostly to avoid information leakage.It > could also achieve this by setting each bit to 1. > What we indeed need to check is later DPDK initialization code doesn't > assume the memory has been zeroed. Otherwise zero only that part of the > memory. Does this makes sense? If all new pages are zero, why does DPDK have to pre-touch the pages at all? I thought there as some optimization to initialize hugepages since Oracle has same problem with their Shared Global Area which was why hugpages were invented anyway
