[dpdk-dev] [PATCH] eal:Map rte cfg and uio at the end of hugepage mem

[Burakov, Anatoly]

Hi

> Problem:
> In DPDK Primary/Secondary module we assume mapping same regions of
> virtual memory addresses for Primary process and Secondary.
> An issue may occur when the Primary and secondary processes are not
> symmetric in such way that the code is not the same (for example, Primary
> process is a traffic distributer and secondary is a worker). The result may be
> that specific virtual address region in the first process won't be available in
> the second process.
> 
> Changes done at eal init:
> map all related rte configuration and uio sections close to the end of huge
> pages memory (that mean rte_eal_memory_init() should be called before
> rte_config_init() in primary process)
> According to our observations there will be more probability to success when
> allocating rte_config and uio memzones after huge pages sections (actually
> uio is already allocated after the huge pages area)

Not sure I understand the purpose of the patch. Doesn't --base-virtaddr flag solve your issues?

Thanks,
Anatoly