Re: [Xen-devel] Kernel panic while compiling kernel

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

> On Monday 16 February 2004 14:59, Keir Fraser wrote:
> 
> > It does seem that your builds have a much higher failure rate than
> > usual. You are doing a completely clean build in all cases, with no
> > modifications from teh default configurations?
> 
> Erm O:-) not quite, but I didn't realize it is not safe to turn some options 
> on (like modular netfilter, QoS, ...)
> I must say that when I recompiled with make defconfig (that is oldconfig 
> without .config, only added reiserfs), mmu update panic is gone.

> CONFIG_MPENTIUM4=y
> CONFIG_X86_L1_CACHE_SHIFT=7

You've probably been bitten by one of these CPU config options. All
your other config changes should be okay (shouldn't break anything).
In particular, I expect that we haven't done testing with any other
cache-line size than 32 bytes.

I'll look into this... it's something I hadn't considered. :-)

*BUT* take it as a reminder to list everything non-standard about your
build and environment when reporting a bug.

 -- Keir

PS. Can you try building your own Xenolinux with all your config
changes _except_ the ones listed above? i.e. you should have
CONFIG_M686=y and CONFIG_X86_L1_CACHE_SHIFT=5. I expect that the
resulting kernel should not crash.


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