Re: [OOPS] related to swap?

[Ian Kumlien <pomac@vapor.com>]

On Wed, 2006-04-05 at 19:38 +1000, Nick Piggin wrote:
> Ian Kumlien wrote:
> >>Ian Kumlien wrote:
> >>
> >>
> >>>Yes, i run a tainted kernel! either live with it or ignore this mail
> >>>=)
> >>
> >>>starting swap lead to a deadlock within 15 mins
> >>
> >>>I have never had the energy to perform a full memtext86+
> >>
> >>It would be useful if you could perform a memtest overnight one night,
> >>then run a non-patched and non-tained 2.6.16.1 kernel, and try to
> >>reproduce the problems.
> > 
> > 
> > As i said, i really doubt that the memory is at fault here, it has done
> > several passes over the memory but not all tests. I can give it a go
> > though, but i really doubt it'll find anything.
> > 
> 
> If it doesn't cost you much time (ie. do it overnight) it could save some
> developers a lot of time.

Yes, i'll try to do it this weekend... Since i need to keep this box
running most of the time.

> > The kernel i run is a plain 2.6.16.1 from kernel.org (i have heard that
> > you can actually compile gentoos own these days)
> 
> OK, good.

Kernel.org, it's the only flavor =)

> > Since this is my *cough* desktop, running it without that ability is
> > kinda a show stopper, thats why i included the thing above.
> 
> But if the problem can be reproduced in 15 minutes, it shouldn't be
> too hard to get a trace without nvidia loaded.

The major bit is, this worked with single core with reiser... Someone
else reported problems with XFS lately though, i'll have to read all
about it... 

> > But the thing is, my laptop runs with the same compiler, "same" nvidia
> > driver and the "same" kernel ("same" as in 32 bit not 64 bit).
> > Eventhough "same" in this case usually means nothing, i doubt that one
> > would have a serius bug and the other wouldn't, ie it's most likley a
> > bug related to 64 bits or one or more of the drivers involved.
> > 
> > The only errors i get in dmesg atm is:
> > KERNEL: assertion (!sk->sk_forward_alloc) failed at net/core/stream.c
> > (283)
> > KERNEL: assertion (!sk->sk_forward_alloc) failed at net/ipv4/af_inet.c
> > (150)
> > 
> > Which is related to TSO, from what i gather, but i can't turn off tso on
> > forcedeth... (i suspected this to cause corruption a while back....)
> 
> If your network hardware or driver is flakey, try compiling a kernel
> without that as well before reproducing this swap problem.

Well, flakey and flakey, it's been running with pretty heavy network and
io load for 4 days now... (with forcedeth, but there is no ethtool
interface for disabling TSO, if that is the problem)

The sky2 driver tended to just die and lockup the box after a while, but
i haven't tested Stepehns recent changes yet since i want something
reliable first, to i have a base for comparison.

Oh, Btw:
free
             total       used       free     shared    buffers
cached
Mem:       3056436    3039052      17384          0       4804
2001672
-/+ buffers/cache:    1032576    2023860
Swap:            0          0          0

If the memory was faulty, i'd have a corrupt filesystem by now imho...
=)

Btw, sorry about being unclear, i spotted it after i mailed, but...
Running without nvidia drivers on a nvdidia card is pretty horrible on a
desktop machine, the kind of resolutions you can get would have been ok
on a amiga, but with X, everything is sooo much bigger... =P

Also, sorry about the CC comment, but it took a day for your mail to hit
my inbox, ie a day after it appeared on lkml, must be the greylists
being overly efficient... =P

-- 
Ian Kumlien <pomac () vapor ! com> -- http://pomac.netswarm.net

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