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From: Thomas Monjalon <thomas.monjalon@6wind.com>
To: Jianbo Liu <jianbo.liu@linaro.org>
Cc: dev@dpdk.org, "Yao, Lei A" <lei.a.yao@intel.com>, "Zhang,
 Helin" <helin.zhang@intel.com>, "Wu, Jingjing" <jingjing.wu@intel.com>
Date: Wed, 03 Aug 2016 09:58:09 +0200
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Subject: Re: [dpdk-dev] [PATCH] i40e: enable i40e pmd on ARM platform
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2016-08-03 14:02, Jianbo Liu:
> I think we can place a compiling condition before rte_rmb() to avoid
> performance decrease on x86.
> For example:  #if defined(RTE_ARCH_ARM) || defined(RTE_ARCH_ARM64)

Please could you explain why a memory barrier would be needed on ARM but
not on x86? What about other architectures?