kern/171563: non PREEMPTION kernel kills 802.11n

[Rui Paulo]

>Number:         171563
>Category:       kern
>Synopsis:       non PREEMPTION kernel kills 802.11n
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Wed Sep 12 05:10:02 UTC 2012
>Closed-Date:
>Last-Modified:
>Originator:     Rui Paulo
>Release:        FreeBSD 10.0 i386
>Organization:
>Environment:
>Description:

Disabling kernel thread preemption on i386, may kill 802.11n. Packet
loss becomes significant when aggregation happens.

>How-To-Repeat:
>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted: