CVSROOT: /cvs
Module name: src
Changes by: [email protected] 2025/09/16 11:29:35
Modified files:
sys/netinet : tcp_input.c tcp_output.c tcp_var.h
Log message:
Retire TCP flag TF_BLOCKOUTPUT.
Together with socket splicing the flag TF_BLOCKOUTPUT was introduced
in 2011. It was needed to prevent direct calls from tcp_input()
via sorwakeup() to tcp_output(). Due to unlocking TCP, socket
wakeup always uses a splicing task on a separate thread, so
tcp_output() runs deferred. Also socket lock prevents that anything
touches this TCP socket concurrently. TF_BLOCKOUTPUT is not needed
anymore. This change also prevents some dangling TCP sockets in
CLOSING state after running regress/sys/netinet/tcpthread.
OK florian@
