On Mon, Apr 02, 2007 at 01:17:45PM +0200, [EMAIL PROTECTED] wrote: [..] > > + /* > > + * Make sure kernel is aligned to 2MB address. Catching it at compile > > + * time is better. Change your config file and compile the kernel > > + * for a 2MB aligned address (CONFIG_PHYSICAL_START) > > + */ > > + BUILD_BUG_ON(ALIGN(CONFIG_PHYSICAL_START, __KERNEL_ALIGN) > > + != CONFIG_PHYSICAL_START); > > + > > /* clear bss before set_intr_gate with early_idt_handler */ > > clear_bss(); > > > > diff -puN > > include/asm-x86_64/page.h~x86_64-check-for-config-physical-start-aligned-2M > > include/asm-x86_64/page.h > > --- > > linux-2.6.21-rc5-mm3-vanilla/include/asm-x86_64/page.h~x86_64-check-for-config-physical-start-aligned-2M > > 2007-04-02 20:50:55.000000000 +0530 > > +++ linux-2.6.21-rc5-mm3-vanilla-root/include/asm-x86_64/page.h > > 2007-04-02 20:51:34.000000000 +0530 > > @@ -79,6 +79,7 @@ extern unsigned long phys_base; > > #endif /* !__ASSEMBLY__ */ > > > > #define __PHYSICAL_START CONFIG_PHYSICAL_START > > +#define __KERNEL_ALIGN 0x200000 > > #define __START_KERNEL (__START_KERNEL_map + __PHYSICAL_START) > > #define __START_KERNEL_map 0xffffffff80000000 > > #define __PAGE_OFFSET 0xffff810000000000 > > _ > > I'm only a user, so I'm not uptodate on these addresses and how they > work. However, how does this solve the problem that running > > make oldconfig > > on a working 2.6.21-rc3-mm2 .config gives an unbootable 2.6.21-rc5-mm3 > kernel? If I read things correctly, you now get a BUG, but the kernel > still won't boot. If that is correct, than I, as a user, don't think > that this is the solution that I feel comfortable with. >
You will get a compile time error and your compilation will not be through if your physical address is not 2MB aligned. Just give it a try. Thanks Vivek - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
