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| author | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2018-08-07 14:56:50 +0200 |
|---|---|---|
| committer | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2018-09-21 10:29:37 +0200 |
| commit | c37f9fba70085fedc8eede7559489d2321393005 (patch) | |
| tree | 042455ebf1fa89a277a825f72e1ed805d0b4d296 /freebsd/sys/netinet/tcp_output.c | |
| parent | Update to FreeBSD head 2017-06-01 (diff) | |
| download | rtems-libbsd-c37f9fba70085fedc8eede7559489d2321393005.tar.bz2 | |
Update to FreeBSD head 2017-08-01
Git mirror commit f5002f5e5f78cae9f0269d812dc0aedb0339312c.
Update #3472.
Diffstat (limited to 'freebsd/sys/netinet/tcp_output.c')
| -rw-r--r-- | freebsd/sys/netinet/tcp_output.c | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/freebsd/sys/netinet/tcp_output.c b/freebsd/sys/netinet/tcp_output.c index d2606fb6..30ec34de 100644 --- a/freebsd/sys/netinet/tcp_output.c +++ b/freebsd/sys/netinet/tcp_output.c @@ -132,6 +132,12 @@ SYSCTL_INT(_net_inet_tcp, OID_AUTO, sendbuf_max, CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(tcp_autosndbuf_max), 0, "Max size of automatic send buffer"); +VNET_DEFINE(int, tcp_sendbuf_auto_lowat) = 0; +#define V_tcp_sendbuf_auto_lowat VNET(tcp_sendbuf_auto_lowat) +SYSCTL_INT(_net_inet_tcp, OID_AUTO, sendbuf_auto_lowat, CTLFLAG_VNET | CTLFLAG_RW, + &VNET_NAME(tcp_sendbuf_auto_lowat), 0, + "Modify threshold for auto send buffer growth to account for SO_SNDLOWAT"); + /* * Make sure that either retransmit or persist timer is set for SYN, FIN and * non-ACK. @@ -382,7 +388,7 @@ after_sack_rexmit: */ if (sack_rxmit == 0) { if (sack_bytes_rxmt == 0) - len = ((int32_t)ulmin(sbavail(&so->so_snd), sendwin) - + len = ((int32_t)min(sbavail(&so->so_snd), sendwin) - off); else { int32_t cwin; @@ -523,8 +529,12 @@ after_sack_rexmit: * XXXGL: should there be used sbused() or sbavail()? */ if (V_tcp_do_autosndbuf && so->so_snd.sb_flags & SB_AUTOSIZE) { - if ((tp->snd_wnd / 4 * 5) >= so->so_snd.sb_hiwat && - sbused(&so->so_snd) >= (so->so_snd.sb_hiwat / 8 * 7) && + int autosndbuf_mod = 0; + if (V_tcp_sendbuf_auto_lowat) + autosndbuf_mod = so->so_snd.sb_lowat; + + if ((tp->snd_wnd / 4 * 5) >= so->so_snd.sb_hiwat - autosndbuf_mod && + sbused(&so->so_snd) >= (so->so_snd.sb_hiwat / 8 * 7) - autosndbuf_mod && sbused(&so->so_snd) < V_tcp_autosndbuf_max && sendwin >= (sbused(&so->so_snd) - (tp->snd_nxt - tp->snd_una))) { |