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Date:      Fri, 06 Jun 2025 23:35:06 +0000
From:      bugzilla-noreply@freebsd.org
To:        net@FreeBSD.org
Subject:   [Bug 286631] TCP SACK: CWND set to 2 MSS after successful SACK recovery
Message-ID:  <bug-286631-7501-Z5jqTUFR3h@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-286631-7501@https.bugs.freebsd.org/bugzilla/>
References:  <bug-286631-7501@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D286631

--- Comment #2 from JY <yjaeyong@gmail.com> ---
Created attachment 261049
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=3D261049&action=
=3Dedit
pcap for congestion window drop after successful recovery

I attached a pcap.

We are not actually using the FreeBSD OS. We are using user-space TCP stack
with  fstack and cherry-picked the releases from your 14.3 to our software.=
 In
our system, unfortunately we don't have black-box logging.

If you let me know specific part you want logging, I can rerun the test col=
lect
the logs.

I will also share the logs that I added in tcp_sack_doack, which gives me c=
lue
for this suspection.

--=20
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