[Bug 268910] ixgbe(4): rxcsum register setting can cause TCP connection hangs

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From: <bugzilla-noreply_at_freebsd.org>
Date: Thu, 26 Jan 2023 11:52:04 UTC

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=268910

--- Comment #5 from Przemysław Lewandowski <przemyslawx.lewandowski@intel.com> ---
This issue exists on 13.1 as well. I cannot reproduce on 14.0 but here PCBGROUP
is not support (I cannot compile source with this flag), I used only RSS flag.
https://reviews.freebsd.org/D33019 - regarding PCBGROUP flag.
I remove PCBGROUP flag from 13.1 and the issue does not occur.
So I think a fix is needed in 13 and 12 versions. I am preparing patch.

Regarding your notes:
I looked at ixgbe driver for ESXi. There is PCSD set only when RSS is enabling.
Document for 10G cards suggests the same.

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