diff options
Diffstat (limited to 'sys/netinet/tcp_syncache.c')
| -rw-r--r-- | sys/netinet/tcp_syncache.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/sys/netinet/tcp_syncache.c b/sys/netinet/tcp_syncache.c index b1b209daa9e9..84d3c1070dfa 100644 --- a/sys/netinet/tcp_syncache.c +++ b/sys/netinet/tcp_syncache.c @@ -1014,9 +1014,15 @@ syncache_add(struct in_conninfo *inc, struct tcpopt *to, struct tcphdr *th, if (to->to_flags & TOF_SCALE) { int wscale = 0; - /* Compute proper scaling value from buffer space */ + /* + * Compute proper scaling value from buffer space. + * Leave enough room for the socket buffer to grow + * with auto sizing. This allows us to scale the + * receive buffer over a wide range while not losing + * any efficiency or fine granularity. + */ while (wscale < TCP_MAX_WINSHIFT && - (TCP_MAXWIN << wscale) < sb_hiwat) + (0x1 << wscale) < tcp_minmss) wscale++; sc->sc_requested_r_scale = wscale; sc->sc_requested_s_scale = to->to_requested_s_scale; |