Jan Kiszka wrote:
> Gilles Chanteperdrix wrote:
> > Jan Kiszka wrote:
> > > This patch addresses two issues:
> > >
> > > - fixes boot hang with CONFIG_IPIPE_TRACE, !CONFIG_IPIPE_TRACE_VMALLOC,
> > > and large CONFIG_NR_CPUS (due to the huge trace buffers this implies,
> > > even if the system has only a few CPUs in fact)
> >
> > This is something I observed even on UP systems: the kernel does not
> > boot on ARM if CONFIG_IPIPE_TRACE_VMALLOC is not selected.
> >
>
> Yeah, well known, that's why we have vmalloc'ed trace buffers.
>
> I just wondered again if this is an arch-specific issue, or if it
> depends on the RAM size. If it is arch-specific, you are welcome to
> change the default of IPIPE_TRACE_VMALLOC ("default y if ARM || ...").
> Or reduce IPIPE_TRACE_SHIFT for ARM, given there is a reasonable value
> (/wrt to the tracer) your boards still boot with.
I will do some tests and propose something like that. I had this problem
with linux 2.6.15 where the initial image (I guess text + data + bss)
must fit in 3 MB. I have not tested since then.
--
Gilles Chanteperdrix.
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