Re: [PATCH 00/10] Kernel memory leak detector 0.8

[Michal Piotrowski]

On 12/07/06, Catalin Marinas <catalin.marinas@xxxxxxxxx> wrote:
> On 12/07/06, Michal Piotrowski <michal.k.k.piotrowski@xxxxxxxxx> wrote:
> > BTW I have _very_ annoying soft lockup. Can you fix that?
> >
> > Jul 12 13:15:47 ltg01-fedora kernel: printk: 1527 messages suppressed.
> > Jul 12 13:15:47 ltg01-fedora kernel: ipt_hook: happy cracking.
> > Jul 12 13:15:56 ltg01-fedora kernel: printk: 1631 messages suppressed.
> > Jul 12 13:15:56 ltg01-fedora kernel: Neighbour table overflow.
> >
> > I don't know why, but clock goes mad.
> >
> > Jul 12 14:08:21 ltg01-fedora kernel: BUG: soft lockup detected on CPU#0!
>
> Maybe the soft lockup report is cause by the clock change (it doesn't
> show any kmemleak functions in the backtrace).

I can't reproduce this on clean 2.6.18-rc1.

> You could change
> SCAN_BLOCK_SIZE in memleak.c to a smaller value as the scanning is
> done with the interrupt disabled.

I have tried
#define SCAN_BLOCK_SIZE         2048
and
#define SCAN_BLOCK_SIZE         1024
Unfortunately it doesn't change anything.

> I'll try tomorrow on my platforms with the soft lockup enabled.

Please try something like this
on tty1
isic -s rand -d your ip (http://www.packetfactory.net/Projects/ISIC/)
on tty2
kml_collector (http://www.stardust.webpages.pl/files/o_bugs/kml/ml/kml_collector.sh)

(I have tried to read random files from /sys on vanilla kernel, but I
can't reproduce that lockup)

> --
> Catalin

Regards,
Michal

--
Michal K. K. Piotrowski
LTG - Linux Testers Group
(http://www.stardust.webpages.pl/ltg/wiki/)
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