* Issue with parsing devargs syntax on Hyper-V platforms with DPDK-21.11
@ 2022-02-02 15:10 madhukar mythri
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From: madhukar mythri @ 2022-02-02 15:10 UTC (permalink / raw)
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On the Hyper-V(Azure) environment with/without Accelerated mode, we are
seeing segmentation-fault issues while running the secondary process of
DPDK with legacy syntax of arguments on DPDK-21.11 version.
Whereas the same arguments were working well till the DPDK-21.08 version,
only with the latest DPDK-21.11 this issue occurs.
Here is the EAL argument syntax to load 'net_failsafe' PMD:
--vdev net_vdev_netvsc0,iface=s1p0 --block 032e:00:02.0
As per analysis on this, found that a new feature was introduced "Enabled
new devargs parser" in DPDK-21.11 version. As part of this new feature
found that this DPDK patch caused this issue:
When we remove this patch code, we do not see any issues with loading
primary/secondary processes. So, looks like an issue in identifying the new
global syntax and fallback to legacy syntax w.r.t to Hyper-V platforms.
Even we tried to give new syntax as mentioned in this patch to load this
"vdev" based bus as follows, but still seeing issues.
Does the new syntax support the "vdev_netvsc"(Hyper-V) based PMD ? If so,
please let us know, the syntax on the same.
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2022-02-02 15:10 Issue with parsing devargs syntax on Hyper-V platforms with DPDK-21.11 madhukar mythri
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