Re: kernel-panic when (eg.) ftp'ing

[Nicolas Guilbert]

Ok, so here are some details that may be useful:

the command history:

login root
fsck.ext2 /dev/hd0s3
settrans -ag /
ftp ftp.debian.org
anonymous

cd debian/dists/sid
get Contents-hurd-i386.gz

and the kernel panic follows immediately:

Kernel page fault at adress 0x0. eip 0x0
Kernel Page fault trap, eip 0x0
kernel trap, type 14, code = 0
Dump of i386_saved_state 002a1af4:
EAX 00000000 EBX 000276c0 ECX 00000024 EDX 000009
ESI 00000009 EDI 002a1b60 EBP 002a1ba4 ESP 0015dd13
CS 0008 SS 0009 DS 0010 ES 0010 FS 001f GS 001f
v86:            DS 1b60 ES 0000 FS 8dfc GS 8dfc
EIP 00000000 EFLAGS 00010217
trapno 14: Page fault error 00000000
panic: trap


the v86 FS and GS values change every time, and once the system just    
hanged during the ftp session. 

Running lspci from the linux system yields
...
00:09:0: Ethernet Controller: Digital Equipment Corporation DECchip 21140
[Faster Net] (rev 22)
...

And it would seem that the driver loaded by the hurd is dec4x5.c at least
it appeared on the boot-up screen (is there an equivalent to dmesg?).
(and that driver works fine under linux).

How should I diagnose it?

On 3 Apr 2002, Neal H Walfield wrote:

> > I'm having some trouble downloading "large" files over the network.  When
> > making an ftp get on files larger than say 50K, the kernel panics. It's
> > hard to be more specific given the shortness of the message. If it has any
> > relevance, copying large files within the filesystem works fine. 
> 
> Not only have I not experienced about this behavior, you have not
> given any real details.
> 
> > Also, how do I remount the filesystem rw without having to reboot
> > (fsck > has a -w switch, however fsck -w -t ext2 /dev/hd0s3 doesn't
> > work)?
> 
> `settrans -ga /mount/point' will cause the active translator to exit
> (i.e. unmount).  Accessing it again (by opening or stating a file)
> will cause it to restart.  If the file system is read only, you can
> force it to read/write mode using:
> 
>   fsysopts /mount/point --writable
>