Re: 2.6.23-rc1: BUG_ON in kmap_atomic_prot()

Alexey Dobriyan
2007-07-23T21:02:17Z

On Tue, Jul 24, 2007 at 12:40:45AM +0400, Alexey Dobriyan wrote:
> > I had more complete info: http://article.gmane.org/gmane.linux.network/66966
> >
> > You're using DEBUG_PAGEALLOC, but I was not, so I think we can rule that out.
> >
> > I haven't worked out where that kmap_atomic() call is coming from yet.
> > Both traces point up into the page allocator, but I _think_ that's stack
> > gunk.
>
> Ahh, you suspect networking.
>
> Here, setup is 2 cheap-ass 100Mb realtek 8139 NICs, one to campus network
> receiving ~20 junk packets per second, one gathering netconsole output
> and ssh to it, no conntracks and fancy stuff.
>
> [reboots with cables physically unplugged]

OK, I run gdb recompile, cat(1) every file in /usr/portage (shitload of
small files) with both cables unplugged. It all went fine for ~5 minutes
after that it crashed exactly same way after 10 secs after plugging one
of them.