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From: "Burakov, Anatoly" <anatoly.burakov@intel.com>
To: Nissim Nisimov <nissimn@radware.com>, "dev@dpdk.org" <dev@dpdk.org>
Thread-Topic: [dpdk-dev] [PATCH] eal:Map rte cfg and uio at the end of
 hugepage	mem
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Date: Thu, 15 Oct 2015 12:32:57 +0000
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Subject: Re: [dpdk-dev] [PATCH] eal:Map rte cfg and uio at the end of
 hugepage	mem
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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 m=
ay be
> that specific virtual address region in the first process won't be availa=
ble in
> the second process.
>=20
> Changes done at eal init:
> map all related rte configuration and uio sections close to the end of hu=
ge
> 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 w=
hen
> allocating rte_config and uio memzones after huge pages sections (actuall=
y
> uio is already allocated after the huge pages area)

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

Thanks,
Anatoly