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

From: yhlu
Date: Fri Jul 29 2005 - 15:49:08 EST

if using you patch, the
"synchronized TSC with CPU" never come out.

then with your patch, I add back patch that moving set callin_map from
smp_callin to start_secondary. It told me can not inquire the apic for
the CPU 1....2....


Initializing CPU#1
masked ExtINT on CPU#1
Calibrating delay using timer specific routine.. 3600.30 BogoMIPS (lpj=7200601)
CPU: L1 I Cache: 64K (64 bytes/line), D cache 64K (64 bytes/line)
CPU: L2 Cache: 1024K (64 bytes/line)
CPU 1(2) -> Node 0 -> Core 1
stepping 02
CPU 1: Syncing TSC to CPU 0.
CPU 1: synchronized TSC with CPU 0 (last diff 0 cycles, maxerr 1415 cycles)
On 7/28/05, Eric W. Biederman <ebiederm@xxxxxxxxxxxx> wrote:
> yhlu <yhlu.kernel@xxxxxxxxx> writes:
> > I have some problem with this patch.
> >
> > YH
> >
> > On 7/28/05, yhlu <yhlu.kernel@xxxxxxxxx> wrote:
> >> Do you mean solve the timing problem for 2 way dual core or 4 way
> >> single core above?
> As best as I can determine the problem is possible any time
> you have more than 2 cpus (from the kernels perspective),
> but you have ti hit a fairly narrow window in cpu start up.
> What problem do you have with this patch.
> Eric
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