--- Peter Jeremy <[EMAIL PROTECTED]> wrote:
>
> Since your /home is almost empty, how about
> (temporarily) moving the contents into /usr and
> swapping onto ad0s1e rather than into a
> swapfile. This should at least enable you to
> build a debug kernel.
I'm now indeed building a new kernel, without using
a swapfile. I have following in the kernel config:
makeoptions DEBUG=-g
options INVARIANTS
options WITNESS
options WITNESS_KDB
options KDB
options DDB
options DDB_NUMSYM
options GDB
Is that enough?
> >First I used 128 MB swapfile on root partition;
> >then tried again with a 128 MB swapfile on /var.
> >However, exactly the same deadlock occurs:
>
> Have you pre-allocated the swapfile or is it being
> allocated as necessary?
> If the latter, try "dd if=/dev/zero of=swapfile
> bs=1m count=128"
Yes, I always 'zero' the swapfile this way,
before adding. Because I have used this swapfile
construct extensively with previous 5-Stable on
the same PC, I assume that harddisk and hardware
are OK. Therefore my conclusion is, that there's
some problem related to swapfile with 6.
I will try to debug as much as I can, to find out
why the machine becomes dead at a particular point
while using a swapfile (fortunately this is very
reproducible).
I have never debugged a kernel, so I may ask soon
for some assistance. Already now I wonder:
1) Can I debug a kernel that does not crash, but
just hangs in a deadlock? Everything seems to
be frozen, except pinging the PC....
2) Is such debugging possible on a headless PC
without a keyboard attached?
I do have serial console access.
Thanks,
Rob.
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