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Message-Id: <200608251645.k7PGjCj9003096@dhcp119.mvista.com> Date: Fri, 25 Aug 2006 09:45:12 -0700 From: Toyo Abe <toyoa@...sta.com> To: Andi Kleen <ak@...e.de> Cc: linux-kernel@...r.kernel.org Subject: [PATCH -mm] x86_64: Adjust the timing of initializing cyc2ns_scale. The x86_64-mm-monotonic-clock.patch in 2.6.18-rc4-mm2 made a change to the updating of monotonic_base. It now uses cycles_2_ns(). I suggest that a set_cyc2ns_scale() should be done prior to the setup_irq(). Because cycles_2_ns() can be called from the timer ISR right after the irq0 is enabled. Signed-off-by: Toyo Abe <toyoa@...sta.com> --- arch/x86_64/kernel/time.c | 4 ++-- 1 files changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/x86_64/kernel/time.c b/arch/x86_64/kernel/time.c index 5bbd05d..03ddc1a 100644 --- a/arch/x86_64/kernel/time.c +++ b/arch/x86_64/kernel/time.c @@ -928,10 +928,10 @@ #endif vxtime.quot = (USEC_PER_SEC << US_SCALE) / vxtime_hz; vxtime.tsc_quot = (USEC_PER_MSEC << US_SCALE) / cpu_khz; vxtime.last_tsc = get_cycles_sync(); - setup_irq(0, &irq0); - set_cyc2ns_scale(cpu_khz); + setup_irq(0, &irq0); + hotcpu_notifier(time_cpu_notifier, 0); time_cpu_notifier(NULL, CPU_ONLINE, (void *)(long)smp_processor_id()); - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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