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SubjectRe: 2.6.24 still doesn't boot on i486..
Michael Tokarev writes:
> Just a follow-up on my earlier bugreport, when
> 2.6.23 first come out....
>
> 2.6.24 seems to not boot on i486-class hardware.
> The machine reboots right after "Booting linux"
> message. 2.6.22 was the last worked kernel.
>
> The relevant config entries are:
>
> CONFIG_TICK_ONESHOT=y
> CONFIG_NO_HZ=y
> CONFIG_HIGH_RES_TIMERS=y
> CONFIG_GENERIC_CLOCKEVENTS_BUILD=y
> CONFIG_X86_PC=y
> CONFIG_M486=y
> CONFIG_X86_GENERIC=y
> CONFIG_X86_CMPXCHG=y <-- is it right?

yes

> CONFIG_X86_L1_CACHE_SHIFT=7
> CONFIG_X86_XADD=y
> CONFIG_X86_PPRO_FENCE=y
> CONFIG_X86_F00F_BUG=y
> CONFIG_X86_WP_WORKS_OK=y
> CONFIG_X86_INVLPG=y
> CONFIG_X86_BSWAP=y
> CONFIG_X86_POPAD_OK=y
> CONFIG_X86_ALIGNMENT_16=y
> CONFIG_X86_INTEL_USERCOPY=y
> CONFIG_X86_MINIMUM_CPU_FAMILY=4
> CONFIG_X86_UP_APIC=y
> CONFIG_X86_UP_IOAPIC=y
> CONFIG_X86_LOCAL_APIC=y
> CONFIG_X86_IO_APIC=y
> CONFIG_X86_MCE=y
> CONFIG_X86_MCE_NONFATAL=y
> CONFIG_X86_MCE_P4THERMAL=y
> CONFIG_NOHIGHMEM=y
> CONFIG_VMSPLIT_3G=y
>
> Compiled with gcc (GCC) 4.2.3 (Debian 4.2.3-2).
>
> This email is also a JFYI-style email. Yesterday
> I tried to debug this issue but discovered that the
> power unit of that machine failed. Well, it still
> works and the machine boots, but at the same time
> it smells like frosted/fried plastic ;) So I don't
> have i486 hardware anymore to test things on...
>
> And now I wonder if I'm the only person in this world
> with i486 machine... ;)

Just FYI, 2.6.23, 2.6.24 and 2.6.25-rc6 work fine on my i486DX4.

However, it's clear from your .config fragment above that you've
enabled features that cannot possibly exist on a 486 (APICs and
MCE for starters) and there may be bugs related to that. I suggest
trimming your .config and making it 486-specific.


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