Messages in this thread Patch in this message | | | Date | Tue, 31 Oct 2006 21:34:21 -0800 | From | Chris Wright <> | Subject | [PATCH 41/61] x86-64: Fix C3 timer test |
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-stable review patch. If anyone has any objections, please let us know. ------------------
From: Andi Kleen <ak@suse.de>
There was a typo in the C3 latency test to decide of the TSC should be used or not. It used the C2 latency threshold, not the C3 one. Fix that.
This should fix the time on various dual core laptops.
Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> Signed-off-by: Chris Wright <chrisw@sous-sol.org>
--- arch/x86_64/kernel/time.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- linux-2.6.18.1.orig/arch/x86_64/kernel/time.c +++ linux-2.6.18.1/arch/x86_64/kernel/time.c @@ -960,7 +960,7 @@ __cpuinit int unsynchronized_tsc(void) if (boot_cpu_data.x86_vendor == X86_VENDOR_INTEL) { #ifdef CONFIG_ACPI /* But TSC doesn't tick in C3 so don't use it there */ - if (acpi_fadt.length > 0 && acpi_fadt.plvl3_lat < 100) + if (acpi_fadt.length > 0 && acpi_fadt.plvl3_lat < 1000) return 1; #endif return 0; -- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.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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