From: Yuanhan Liu <yliu@fridaylinux.org>
To: "Wang, Wei 5. (NSB - CN/Hangzhou)" <wei.5.wang@nokia-sbell.com>
Cc: "dev@dpdk.org" <dev@dpdk.org>, "Tan, Jianfeng" <jianfeng.tan@intel.com>
Subject: Re: [dpdk-dev] The limitation of VHOST_MEMORY_MAX_NREGIONS in virtio-user with vhost-user backend
Date: Tue, 5 Dec 2017 22:41:37 +0800 [thread overview]
Message-ID: <20171205144137.GJ9111@yliu-dev> (raw)
In-Reply-To: <HE1PR07MB34492F9D3EC4BC26B97245D9DF3D0@HE1PR07MB3449.eurprd07.prod.outlook.com>
On Tue, Dec 05, 2017 at 06:58:53AM +0000, Wang, Wei 5. (NSB - CN/Hangzhou) wrote:
>
>
> Hi, all
>
> In DPDK document, it it described that Virtio in containers Cannot work when there are more than VHOST_MEMORY_MAX_NREGIONS(8) hugepages. In another word, do not use 2MB hugepage so far. Do you know the reason of this limitation?
It comes from the vhost-user spec.
> In my envirionment, the pdpe1gb is not set in cpu flag, so hugepage can't be set to 1GB size. The hugepage number shall be more than 8
>
>
> So is there any solution or workaround to fix this limitation? Or change dpdk code to fix this limitation?
>
AFAIK, there are no workarounds. And I think the DPDK EAL memory code need be
refactored a bit to fix this limitation. Unforunately, seems there are no work
on that recently.
--yliu
next prev parent reply other threads:[~2017-12-05 14:41 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-12-05 6:58 Wang, Wei 5. (NSB - CN/Hangzhou)
2017-12-05 14:41 ` Yuanhan Liu [this message]
2017-12-06 2:55 ` Tan, Jianfeng
2017-12-06 2:59 ` Wang, Wei 5. (NSB - CN/Hangzhou)
2017-12-06 11:23 ` Maxime Coquelin
2017-12-06 14:06 ` Yuanhan Liu
2017-12-06 18:22 ` Maxime Coquelin
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