-------- Original-Nachricht -------- > Datum: Wed, 14 Nov 2007 10:37:52 +1100 > Von: Benjamin Herrenschmidt <[EMAIL PROTECTED]> > An: Gerhard Pircher <[EMAIL PROTECTED]> > CC: linuxppc-dev@ozlabs.org > Betreff: Re: Kernel locks up after calling kernel_execve()
> Add printk's to things :-) It's a UP kernel so there should be no > spinlocks anyway. > > Best is to try to get a 100% reprocase and printk your way toward the > origin of the problem if you don't have a HW debugger. Unless you manage > to sneak in an irq to xmon but if you are totally locked up, you > probably can't. Also xmon seems to lockup the machine. I was able to active it through the magic sysrq key, but the machine died afterwards. > Could also be something you do that your buggy northbridge doesn't like. > For example, maybe it dislikes M bit in the hash table and you end up > with it set due to other reasons (I know we had changes in this area). Yeah, the northbridge hates the M bit! Thus the AmigaOne platform code masks out the CPU_FTR_NEED_COHERENT flag and disables the L2 cache prefetch engines (I don't care about the performance loss). I couldn't find any other code that sets the M bit, except for huge TLB page support, but isn't that only for PPC64? Gerhard -- Der GMX SmartSurfer hilft bis zu 70% Ihrer Onlinekosten zu sparen! Ideal für Modem und ISDN: http://www.gmx.net/de/go/smartsurfer _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
