Hi... I could only share my thoughts on your 2nd question... On Thu, May 22, 2008 at 12:43 AM, Mayank Kaushik <mayank.utexas@xxxxxxxxx> wrote: > I have been reading Chapter 9 of the Intel Processor Manuals, Vol 3A > (System Programming Guide), which details the APIC. > I have noticed that we often have to add the noapic and nolapic > arguments to the kernel command line to make devices like the wireless > card work. The explanation for these options simply stated that this > is to overcome "buggy bios implementations". > > Can someone here explain what could possibly be the bug in the bios > that necessitates the use of these arguments? Further, what does the > kernel do differently when it sees these arguments? simple, it reverts back to the old PIC. Old PIC, to the best I know, is slower, it's not "installed" per processor. Thus, one of the effect is, it send interrupts globally, making the whole processors turn their attention to every interrupts. regards, Mulyadi. -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
