kern/37937: tcp recv buffer auto scaling seems broken

[yamt%mwd.biglobe.ne.jp@localhost]

>Number:         37937
>Category:       kern
>Synopsis:       tcp recv buffer auto scaling seems broken
>Confidential:   no
>Severity:       serious
>Priority:       low
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri Feb 01 11:05:00 +0000 2008
>Originator:     YAMAMOTO Takashi <yamt%mwd.biglobe.ne.jp@localhost>
>Release:        NetBSD 4.99.52
>Organization:
        
>Environment:
>Description:
        tcp receive buffer auto scaling (sysctl net.inet.tcp.recvbuf_auto)
        seems to assume that tcp timestamps increases relatively fast when
        estimating the rtt.  however, we use 0.5s clock for them.
        (freebsd uses hardclock ticks for the timestamps.)
>How-To-Repeat:
        code inspection.
>Fix:
        

>Unformatted: