[Bug 280074] em(4) temporarily hangs and re-enables TX CSUM if a bridge it's a member of is modified

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Newsgroups gmane.os.freebsd.devel.net
Message-ID <[email protected]/bugzilla/>
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=280074

--- Comment #8 from Joshua Kinard <[email protected]> ---
(In reply to Marek Zarychta from comment #7)
I don't think the issue is in the epair(4) driver.  I can clearly prove that
the base system em(4) driver exhibits the behavior, while the variant provided
by net/intel-em-kmod does not.  That's a sign that it's more likely an issue
with the base system em(4) driverm not epair(4).

Nor do I think it is bridge(4) that is at fault, as I have other FreeBSD
systems using re(4), igb(4), and lagg(4) that also use jails with epair(4), and
starting/stopping their jails does not cause a temporary loss of network
connectivity, like I am seeing with em(4) (and as others in the referenced
Reddit thread also noticed).

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