From: "Burakov, Anatoly" <anatoly.burakov@intel.com>
To: Rosen Xu <rosen.xu@intel.com>, dev@dpdk.org
Cc: gaetan.rivet@6wind.com, john.mcnamara@intel.com,
yulong.pei@intel.com, stable@dpdk.org
Subject: Re: [dpdk-stable] [PATCH] doc/guides/rel_notes: Add known issue for IOMMU attributes read
Date: Mon, 14 May 2018 18:10:01 +0100 [thread overview]
Message-ID: <6b9962cf-1b50-0cf7-83e6-d9fe696c62bf@intel.com> (raw)
In-Reply-To: <1526294652-102665-1-git-send-email-rosen.xu@intel.com>
On 14-May-18 11:44 AM, Rosen Xu wrote:
> Read IOMMU attributes from linux kernle 4.10.0 error.
s/kernle/kernel :)
>
> Cc: stable@dpdk.org
>
> Signed-off-by: Rosen Xu <rosen.xu@intel.com>
> ---
> doc/guides/rel_notes/known_issues.rst | 21 +++++++++++++++++++++
> 1 file changed, 21 insertions(+)
>
> diff --git a/doc/guides/rel_notes/known_issues.rst b/doc/guides/rel_notes/known_issues.rst
> index afcc2c4..74876ff 100644
> --- a/doc/guides/rel_notes/known_issues.rst
> +++ b/doc/guides/rel_notes/known_issues.rst
> @@ -714,3 +714,24 @@ igb_uio can not be used when running l3fwd-power
>
> **Driver/Module**:
> ``igb_uio`` module.
> +
> +
> +linux kernel iommu attribute read error
Should this be capitalized?
> +---------------------------------------
> +
> +**Description**:
> + Read immu attributes from /sys/devices/virtual/iommu/dmarXXX/intel-iommu/cap in linux kernel
> + 4.10.0 error. That because the link between the iommu sysfs-device and the struct intel_iommu
> + is no longer stored as driver-data.
s/immu/IOMMU/, and i think this needs to be rewritten to something like
as follows:
Reading IOMMU attributes from
/sys/devices/virtual/iommu/dmarXXX/intel-iommu/cap in Linux kernel
4.10.0 results in an error. This is because the link between the IOMMU
sysfs-device and struct intel_iommu is no longer stored as driver-data.
(i have no idea what that last sentence means, maybe someone could help
provide a better explanation?)
> +
> +**Implication**:
> + When insmod ``vfio-pci`` and running testpmd APP, it doesn't initiate properly.
Should probably be reworded as follows:
When binding devices to VFIO and attempting to run testpmd application,
testpmd (and other DPDK applications) will not initialize.
> +
> +**Resolution/Workaround**:
> + Use other linux kernel version. It only happens in linux kernel 4.10.0.
> +
> +**Affected Environment/Platform**:
> + ALL OS of linux kernel 4.10.0.
> +
> +**Driver/Module**:
> + ``vfio-pci`` module.
>
--
Thanks,
Anatoly
next prev parent reply other threads:[~2018-05-14 17:10 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-05-14 10:44 Rosen Xu
2018-05-14 17:10 ` Burakov, Anatoly [this message]
2018-05-16 6:08 ` Xu, Rosen
2018-05-16 7:29 ` [dpdk-stable] [PATCH v2] " Rosen Xu
2018-05-28 15:31 ` Mcnamara, John
2018-05-28 15:36 ` Mcnamara, John
2018-05-29 0:25 ` Xu, Rosen
2018-05-30 12:04 ` Thomas Monjalon
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