Re: [PATCH] x86_64: sync_tsc fix the race (so we can boot)

From: Eric W. Biederman
Date: Fri Jul 29 2005 - 11:06:36 EST

Andi Kleen <ak@xxxxxxx> writes:

> On Wed, Jul 27, 2005 at 10:03:04PM -0600, Eric W. Biederman wrote:
>> I believe this patch suffers from apicid versus logical cpu number confusion.
>> I copied the basic logic from smp_send_reschedule and I can't find where
>> that translates from the logical cpuid to apicid. So it isn't quite
>> correct yet. It should be close enough that it shouldn't be too hard
>> to finish it up.
>> More bug fixes after I have slept but I figured I needed to get this
>> one out for review.
> Thanks looks good. This should fix the unexplained
> hang for various people. Logical<->apicid is actually ok, the low
> level _mask function takes care of that (it differs depending on the
> APIC mode anyways)

I guess my confusion comes from looking at the code in flat_send_IPI_mask.
cpus_addr(mask)[0] reduces it to just the first word but I don't
see any translation being done.

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at