file system error (fwd)

[steven james]

Greetings,

Any poassability that the amount of memory passed to the kernel is too
high and the crashes are due to using non-existant memory for a buffer or
struct?

1st test is check reported memory on boot, 2nd is memtest86, 3rd is to
pass mem=(some small value) to the kernel and see what happens.

G'day,
sjames



On Mon, 2 Dec 2002, Munjun Kang wrote:

> > "Ronald G. Minnich" <rminnich at lanl.gov> writes:
> > 
> > > any ideas?
> > > 
> > > ron
> > > 
> > > ---------- Forwarded message ----------
> > > Date: Fri, 29 Nov 2002 15:35:52 +0900
> > > From: Munjun Kang <malas at pinetron.com>
> > > To: Ronald G. Minnich <rminnich at lanl.gov>
> > > Subject: Re: file system error
> > > 
> > > Thanks for your reply.
> > > 
> > > I tried as your suggest.
> > > 
> > > dd if=/dev/zero of=/dev/hda bs=1024 count=10000 ~ 100000
> > > Segmentation fault's are occured in random by count.
> > > 
> > > and then, turn off the UDMA feature by hdparm option.
> > > But, I can see same symptom.
> > 
> > All DMA is turned off hdparm -d0 /dev/hda ??
> Yes, I did it.
> 
> >  
> > > In this time, I tried to attach SCSI & IEEE1394 SBP-2 devices.
> > > case1. Adaptec 2930 SCSI adapter + 8GB Seagate SCSI HDD
> > > case2. IEEE1394 Interface card + external IEEE1394 HDD
> > > both cases show the same problem.
> > 
> > The northbridge having DMA problems is still a canidate.
> > SCSI disks do DMA as well. 
> >  
> > > Now, I think it's not a DMA problem.
> > > I'm in the maze. hmmmm......
> > > 
> > > Is there any clear hint?
> > 
> > Past history with the Athlon problems on VIA chipsets
> > says that some VIA northbridges have problems with burst traffic.
> > 
> > And either DMA or a fast memory copy could trigger it.   memtest86
> > currently does not have an optimized memcpy so it could miss that problem.
> > 
> > Currently I consider your northbridge to be the best canidate.
> > The same kernel is run under both BIOSes?
> I tried in several cases.
> 1. Build-in BIOS + 2.4.18-13 (redhat 8.0)        => work
> 2. Linuxbios + 2.4.18-13 (redhat 8.0)               => don't work     
> 3. Linuxbios + 2.4.19                                       => don't work
> 
> > 
> > Compared to your previous BIOS are there any unknown settings
> > in the northbridge?
> > 
> > In particular what are the differences between, on both boards,
> > and can you account for the differences.
> > lspci -s 0:0.0 -xxx
> > And can you account for all differences.
> In work,
> 00:00.0 Host bridge: VIA Technologies, Inc. VT8605 [ProSavage PM133]
> 00: 06 11 05 06 06 00 10 a2 00 00 00 06 00 08 00 00
> 10: 08 00 00[e8]00 00 00 00 00 00 00 00 00 00 00 00
> 20: 00 00 00 00 00 00 00 00 00 00 00 00[06 11 05 06]
> 30: 00 00 00 00 a0 00 00 00 00 00 00 00 00 00 00 00
> 40: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> 50: fd db c8 be 05 00 08 08 c0 00 08 08 08 08 08 08
> 60: 03[aa]00[20]e6 d5 d5 00 43 38 86 0d 08 21 00 00
> 70: c4 88[cc]0c 0e 81 52 00 01 b4 09 00 00 00 00 00
> 80: 0f 40 00 00 c0 00 00 00 02 00 00 00 00 00 00 00
> 90: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> a0: 02 c0 20 00 07 02 00 1f 00 00 00 00 2f 02 04 00
> b0: 40 ff 10 00 00 00 00 00 00 00 00 00 00 00 00 00
> c0: 01 00 02 00 00 00 00 00 00 00 00 00 00 00 00 00
> d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> f0: 00 00 00 00 00 00 06 00 32 42 00 b0 00 00 00 00
> 
> In problem,
> 00:00.0 Class 0600: 1106:0605
> 00: 06 11 05 06 06 00 10 a2 00 00 00 06 00 08 00 00
> 10: 08 00 00[f8]00 00 00 00 00 00 00 00 00 00 00 00
> 20: 00 00 00 00 00 00 00 00 00 00 00 00[00 00 00 00]
> 30: 00 00 00 00 a0 00 00 00 00 00 00 00 00 00 00 00
> 40: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> 50: fd db c8 be 05 00 08 08 c0 00 08 08 08 08 08 08
> 60: 03[00]00[00]e6 d5 d5 00 43 38 86 0d 08 21 00 00
> 70: c4 88[4c]0c 0e 81 52 00 01 b4 09 00 00 00 00 00
> 80: 0f 40 00 00 c0 00 00 00 02 00 00 00 00 00 00 00
> 90: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> a0: 02 c0 20 00 07 02 00 1f 00 00 00 00 2f 02 04 00
> b0: 40 ff 10 00 00 00 00 00 00 00 00 00 00 00 00 00
> c0: 01 00 02 00 00 00 00 00 00 00 00 00 00 00 00 00
> d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> f0: 00 00 00 00 00 00 06 00 32 42 00 b0 00 00 00 00
> 
> 0x13 : Graphics Aperature Base
> 0x2c : I don't know. maybe same with vendor & device ID
> 0x61, 0x62 : shadow ram setting
> 0x72 : CPU to PCI Flow control. difference bit 7 is described as follow.
>         7bit Retry Status
>             0 No retry occurred -------- default
>             1 Retry occurred ----------- write 1 to clear
> 
> In my opinion, there are not special differences.
> 
> > 
> > Eric
> > 
> > _______________________________________________
> > Linuxbios mailing list
> > Linuxbios at clustermatic.org
> > http://www.clustermatic.org/mailman/listinfo/linuxbios
> > 
> _______________________________________________
> Linuxbios mailing list
> Linuxbios at clustermatic.org
> http://www.clustermatic.org/mailman/listinfo/linuxbios
> 

-- 
-------------------------steven james, director of research, linux labs
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