>  When I send heavy traffic to many gif interfaces, the system freezes
 > or automatically resets. It seems it occures a kernel stack overflow.
 > It occurs on the 1.6 release kernel.
 > 
 > following log was made with
 > 	  netbsd-1-6
 > 	+ KSTACK_CHECH patch
 > 	+ i386/db_trace.c rev. 1.32 pullup
 > 
 > Perhaps it occurs when softnetintr() works heavily.
 > I obsered on i386 only. At least it doesn't occur on macppc.

s/obsered/observed/

 > -------------------------------------------
 > panic: trap on DR0: maybe kernel stack overflow

Perhaps there is a race condition in doteti() or any other routine.

----------------------------------------------------------
		SAITOH Masanobu (masanobu@iij.ad.jp
				  msaitoh@netbsd.org)