Re: port-mac68k/57107: kernel panic on -current when configuring network with sn(4) on mac68k

[Izumi Tsutsui <tsutsui%ceres.dti.ne.jp@localhost>]

The following reply was made to PR port-mac68k/57107; it has been noted by GNATS.

From: Izumi Tsutsui <tsutsui%ceres.dti.ne.jp@localhost>
To: gnats-bugs%netbsd.org@localhost
Cc: tsutsui%ceres.dti.ne.jp@localhost
Subject: Re: port-mac68k/57107: kernel panic on -current when configuring network
	 with sn(4) on mac68k
Date: Fri, 30 Dec 2022 13:35:29 +0900

 > >Synopsis:       kernel panic on -current when configuring network with sn(4) on mac68k
  :
 > >Description:
 > on mac68k on a quadra 700 (sn(4) network driver), the following panic occurs when attempting to configure network during installation:
 
 Also happens on my LC630 with Apple Ethernet CS Twisted-Pare Card.
 
 - HEAD/202212280510Z/mac68k/installation/instkernel/netbsd-INSTALLSBC.gz
   in NetBSD-daily fails
 
 - netbsd-9/202212290100Z/mac68k/installation/instkernel/netbsd-INSTALLSBC.gz
   in NetBSD-daily works
 
 - it looks triggered in very early m_freem() on sonic_txintr() and
   ether_input() or arpintr() etc. invoked from softintr(9) thread
   after sonic_rxintr()
   
 - there is no siginificant changes in MI sonic (src/sys/dev/ic/dp83932.c)
   between netbsd-9 and HEAD
 
 - it looks one major change around network layer between netbsd-9 and HEAD
   is pktqueue(9) (but not investigated yet)
 
 - another posibility is wrong POOL_REDZONE check that was not enabled in
   netbsd-9 (note mac68k INSTALL has options DIAGNOSTIC but GENERIC doesn't)
  http://cvsweb.netbsd.org/bsdweb.cgi/src/sys/kern/subr_pool.c#rev1.259
 
 ---
 Izumi Tsutsui