On Wed, 4 Mar 2020 16:38:13 +0000 tgw_team(腾讯网关团队) <tgw_t...@tencent.com> wrote:
> Sorry, I`ll use a real name in patch v2. > > I don't think this is a TOCTOU question. > The original code works fine when compiled with the -O3 option. > At this point the compiler will optimize to one memory access. > But when compiled with -O0, there will be two memory accesses, which is wrong. > This change was modified with reference to the rte_eth_tx_burst function. There is nothing C standard that says compiler has to do it either way. The optimizer may decide to do two memory accesses or one. Depending on that in anyway is bad practice.
