bce0: Error mapping mbuf into TX chain!

[David (Controller AE) Christensen]

Scott,

What are you doing when this problem occurs?  Is it something I can
easily duplicate here?  When I tested the fix on -CURRENT I used the
following command suggested by Doug to bring out the failure quickly:

ssh <bad machine> "dd if=/dev/zero bs=1" > /dev/null

Does this same command fail for you too?

Dave 

> -----Original Message-----
> From: Scott Wilson [mailto:scott.wilson at gmail.com] 
> Sent: Saturday, August 05, 2006 3:08 PM
> To: pyunyh at gmail.com
> Cc: Doug Ambrisko; David (Controller AE) Christensen; 
> stable at freebsd.org; davidch at freebsd.org; Eric Hodel
> Subject: Re: Re: Re: bce0: Error mapping mbuf into TX chain!
> 
> On 8/5/06, Pyun YongHyeon <pyunyh at gmail.com> wrote:
> > On Fri, Aug 04, 2006 at 03:52:40PM +0200, Scott Wilson wrote:
> >  > On 7/13/06, Doug Ambrisko <ambrisko at ambrisko.com> wrote:
> >  > >David (Controller AE) Christensen writes:
> >  > >| Sorry, I've been out on vacation and just got back 
> into town.  I'll MFC
> >  > >| the patch within the next day or two.
> >  > >
> >  > >I'll let you merge in the down/up fix that I put into -current.
> >  > >
> >  > >Doug A.
> >  >
> >  > Hi, I just had a bce interface lock up with the same problem:
> >  >
> >  > Aug  4 07:00:16 pe3 kernel: bce0: 
> /usr/src/sys/dev/bce/if_bce.c(4644):
> >  > Error mapping mbuf into TX chain!
> >  > Aug  4 07:00:47 pe3 last message repeated 368 times
> >  > ....
> >  >
> >  > running v 1.2.2.5 of if_bce.c from RELENG_6 which has the
> >  > defragmentation patch mentioned in this thread.  Any 
> suggestions on
> >  > how I can help find a fix?
> >  >
> >  > scott
> >
> > Hmm... I can see several bus_dma(9) related bugs in bce(4).
> > For architectures that have IOMMU hardware it may have corrupted DMA
> > mapping and I'm pretty sure it wouldn't work on sparc64.
> > When it has to handle many fragmented frame or has insufficient
> > number of free Tx descriptors it would show unexpected results.
> > Unfortunately I don't have hardwares supported by bce(4) and
> > fixing requiries a working hardware. :-(
> >
> 
> I see ... I am running amd64 on some dell poweredge 1950 boxes.
> They're xeon processors, but have chosen amd64 because they have 8gig
> of ram each.
> 
> Here are the relevant details on the interface....
> 
> bce0: <Broadcom NetXtreme II BCM5708 1000Base-T (B1), v0.9.5> mem
> 0xf4000000-0xf5ffffff irq 16 at device 0.0 on pci9
> bce0: ASIC ID 0x57081010; Revision (B1); PCI-X 64-bit 133MHz
> miibus0: <MII bus> on bce0
> brgphy0: <BCM5708C 10/100/1000baseTX PHY> on miibus0
> brgphy0:  10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, 1000baseTX,
> 1000baseTX-FDX, auto
> 
> I could make a machine available remotely to someone if it would help.
> 
> Any other advice on how I can help move this forward would be greatly
> appreciated!
> 
> thanks,
> 
> scott
> 
>