Ken Pearlstein wrote:
>
> Here is my /etc/sysconfig/vmdump ....
> DUMP_ACTIVE=1
> DUMPDEV=/dev/vmdump
> DUMPDIR=/var/log/vmdump
> DUMP_SAVE=1
> DUMP_LEVEL=4
> DUMP_COMPRESS_PAGES=0
> PANIC_TIMEOUT=60
>
> The first question is )
> when I force a panic of the system ( I used a module which calls panic)
> sometimes I get the message "Warning: vmdump only contains a dump
> header. Printing dump header:" and sometimes I dont ...
You can't use a module to call panic(). lcrash isn't capable (yet)
of debugging kernel modules. The resulting crash dump may not be
usable by lcrash. The memory will be there, of course ...
> The vmdump."BOUNDS" files are the same size .....
> -rw-r--r-- 1 root root 60344741 Mar 13 10:50 vmdump.2
> -rw-r--r-- 1 root root 60344741 Mar 13 06:54 vmdump.1
>
> vmdump.1 works and vmdump.2 doesnt ????
Is the second one an exception dump, and not a panic() dump?
> The second question is) do you know if an NMI will produce a dump ??
It _should_ ... I put in some code to catch the NMI watchdog, but I
haven't reproduced the case as of yet.
> and the last question) .... when $? is non zero why do the following
> lines in save_vmdump
>
> $LCRASH -r map.$BOUNDS vmdump.$BOUNDS kerntypes.$BOUNDS
> \
> > analysis.$BOUNDS 2>&1
> if [ $? -ne 0 ] ; then
> echo "Error: could not create crash report." >&2
>
> exit 1
> fi
>
> produce the following output
>
> Saving crash dump data (if any)
> Error: could not create crash reAdding Swap: 530112k swap-space
> (priority -1)
> port.ut to the sniaconsole
>
> I am not sure if this happens on all linux consoles or is only an snia
> console problem .....
This might be a console issue on your end. Looks like the kernel log
buffer (dmesg) and the boot-up script information is going to the same
screen.
--Matt
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>
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