bge hangs on recent 7.3-STABLE

[Pyun YongHyeon]

On Mon, Sep 13, 2010 at 06:27:08PM +0400, Igor Sysoev wrote:
> On Thu, Sep 09, 2010 at 02:18:08PM -0700, Pyun YongHyeon wrote:
> 
> > On Thu, Sep 09, 2010 at 01:10:50PM -0700, Pyun YongHyeon wrote:
> > > On Thu, Sep 09, 2010 at 02:28:26PM +0400, Igor Sysoev wrote:
> > > > Hi,
> > > > 
> > > > I have several hosts running FreeBSD/amd64 7.2-STABLE updated on 11.01.2010
> > > > and 25.02.2010. Hosts process about 10K input and 10K output packets/s
> > > > without issues. One of them, however, is loaded more than others, so it
> > > > processes 20K/20K packets/s.
> > > > 
> > > > Recently, I have upgraded one host to 7.3-STABLE, 24.08.2010.
> > > > Then bge on this host hung two times. I was able to restart it from
> > > > console using:
> > > >   /etc/rc.d/netif restart bge0
> > > > 
> > > > Then I have upgraded the most loaded (20K/20K) host to 7.3-STABLE, 07.09.2010.
> > > > After reboot bge hung every several seconds. I was able to restart it,
> > > > but bge hung again after several seconds.
> > > > 
> > > > Then I have downgraded this host to 7.3-STABLE, 14.08.2010, since there
> > > > were several if_bge.c commits on 15.08.2010. The same hangs.
> > > > Then I have downgraded this host to 7.3-STABLE, 17.03.2010, before
> > > > the first if_bge.c commit after 25.02.2010. Now it runs without hangs.
> > > > 
> > > > The hosts are amd64 dual core SMP with 4G machines. bge information:
> > > > 
> > > > bge0 at pci0:4:0:0:        class=0x020000 card=0x165914e4 chip=0x165914e4 rev=0x11 hdr=0x00
> > > >     vendor     = 'Broadcom Corporation'
> > > >     device     = 'NetXtreme Gigabit Ethernet PCI Express (BCM5721)'
> > > > 
> > > > bge0: <Broadcom NetXtreme Gigabit Ethernet Controller, ASIC rev. 0x004101> mem 0xfe5f0000-0xfe5fffff irq 19 at device 0.0 on pci4
> > > > miibus1: <MII bus> on bge0
> > > > brgphy0: <BCM5750 10/100/1000baseTX PHY> PHY 1 on miibus1
> > > > brgphy0:  10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, 1000baseT, 1000baseT-FDX, auto
> > > > bge0: Ethernet address: 00:e0:81:5f:6e:8a
> > > > 
> > > 
> > > Could you show me verbose boot message(bge part only)?
> > > Also show me the output of "pciconf -lcbv".
> > > 
> > 
> > Forgot to send a patch. Let me know whether attached patch fixes
> > the issue or not.
> 
> > Index: sys/dev/bge/if_bge.c
> > ===================================================================
> > --- sys/dev/bge/if_bge.c	(revision 212341)
> > +++ sys/dev/bge/if_bge.c	(working copy)
> > @@ -3386,9 +3386,11 @@
> >  	sc->bge_rx_saved_considx = rx_cons;
> >  	bge_writembx(sc, BGE_MBX_RX_CONS0_LO, sc->bge_rx_saved_considx);
> >  	if (stdcnt)
> > -		bge_writembx(sc, BGE_MBX_RX_STD_PROD_LO, sc->bge_std);
> > +		bge_writembx(sc, BGE_MBX_RX_STD_PROD_LO, (sc->bge_std +
> > +		    BGE_STD_RX_RING_CNT - 1) % BGE_STD_RX_RING_CNT);
> >  	if (jumbocnt)
> > -		bge_writembx(sc, BGE_MBX_RX_JUMBO_PROD_LO, sc->bge_jumbo);
> > +		bge_writembx(sc, BGE_MBX_RX_JUMBO_PROD_LO, (sc->bge_jumbo +
> > +		    BGE_JUMBO_RX_RING_CNT - 1) % BGE_JUMBO_RX_RING_CNT);
> >  #ifdef notyet
> >  	/*
> >  	 * This register wraps very quickly under heavy packet drops.
> 
> Thank you, it seems the patch has fixed the bug.
> BTW, I noticed the same hungs on FreeBSD 8.1, date=2010.09.06.23.59.59
> I will apply the patch on all my updated hosts.
> 

Thanks for testing. I'm afraid bge(4) in HEAD, stable/8 and
stable/7(including 8.1-RELEASE and 7.3-RELEASE) may suffer from
this issue. Let me know what other hosts work with the patch.