> На сайте нетфликса исходники поищи. Что, не находятся? То-то и оно. Проприетарь.

Эк ты уныло спрыгнул - да еще и прямо в лужу:
https://cgit.freebsd.org/src/log/?qt=grep&q=netflix

tcp: drop data received after a FIN has been processed RFC 9293 describes the handling of data in the CLOSE-WAIT, CLOSING,

Reviewed by:        rrs, rscheff
MFC after:        3 days
Sponsored by:        Netflix, Inc.

nvmecontrol: Flesh out nvmecontrol format information
The format command takes a number of different parameters.

Sponsored by:        Netflix
Reviewed by:        pauamma@gundo.com, chuck

Fix new users of MAXPHYS and hide it from the kernel namespace
In cd8537910406, kib made maxphys a load-time tunable.  This made

Reviewed by: imp, jkim, kib, markj
Fixes: 30038a8b4efc ("md: Get rid of the pbuf zone")
Sponsored by: Netflix