[Bug 181741] [kernel] [patch] Packet loss when 'control' messages are present with large data (sendmsg(2))

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=181741

chris.torek at gmail.com changed:

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                 CC|                            |chris.torek at gmail.com

--- Comment #10 from chris.torek at gmail.com ---
Created attachment 168943
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=168943&action=edit
updated patch series, applies to -r297514

We were running into this same bug at iX, so I ported the original patch to the
HEAD kernel (which required a bit of tweaking) and then added my own changes
(see commit text for descriptions).  Then I back-ported it back to the iX
kernel which is a bit behind HEAD (and fixed typos in both versions, etc),
where it is now at least lightly tested.

I'll attach the updated patches as a series of git commits suitable for "git
am" (on the github version of the FreeBSD tree); feel free to redo them in some
other form, including perhaps combining Yuri's original patch and the small
subsequent fixes.  The last (and large) "rewrite for clarity" section probably
should stay a separate patch though.

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