Esa Karkkainen wrote:
On Sun, Oct 14, 2007 at 02:37:23PM +0200, Kris Kennaway wrote:
Esa Karkkainen wrote:
I get "Fatal double fault" error when writing to a filesystem
mounted from NFS server.
I got an offlist reply in which he suggested that the problem might be
in nve driver.
I installed an additional Intel nic, appropriate lines from dmesg are
as follows
fxp0: <Intel 82559 Pro/100 Ethernet> port 0xb000-0xb03f mem
0xe7200000-0xe7200fff,0xe7000000-0xe70fffff irq 11 at device 6.0 on pci1
miibus1: <MII bus> on fxp0
inphy0: <i82555 10/100 media interface> on miibus1
inphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
After I started to use fxp0, I can dump(8) all the necessary filesystems
to the NFS mount, with out panic.
When I used nve0 dump(8) or cp(1) managed to write less than megabyte to NFS
mount and then machine paniced.
It didn't matter if I made dump(8) write to the NFS mount or to a local
filesystem and then copied the file to NFS mount, the end result was a
panic.
Both NFS server and client are running 6.2-RELEASE-p7.
Both machines have been updated to -p8.
# kgdb kernel.debug /home/crash/vmcore.2
Fatal double fault:
eip = 0xc063242a
Can you look up these IPs in the kernel symbol table (see the developers
handbook)? This might give at least one clue, although I'm not sure it
is relevant.
I'm sorry, but I need to learn alot more about gdb and debugging in
general before I can find that information. IIRC I have written about
ten or twenty lines of C in this millenia.
Well, it's explained in explicit detail in that document. C code is not
involved.
I do have matching kernel.debug and vmcore files, but kernel modules etc
have been removed before I made new kernel and world.
OK, most likely too late then.
You might also update to RELENG_6, I think there was at least one bug
fixed that might have caused such a thing.
At the moment I don't have any stability problems with this machine, but
I can upgrade to RELENG_6 before RELENG_6_3 is branched if that is
necessary.
Also try to rule out memory failure etc.
This machine has two 512MB DDR333 DIMM's.
I installed sysutils/memtest and ran three simultaneously, first two
allocated 326 MB each and last one allocated 150 MB of memory, so I'd
start to swap. No errors.
Well, as you say, such a limited test doesn't mean much. Anyway, it may
well have been nve, so see how you go without it.
kris
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