From: john stultz Date: Tue, 27 Mar 2007 05:32:19 +0000 (-0800) Subject: [PATCH] correct slow acpi_pm rating X-Git-Tag: v2.6.21-rc6~104 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1ff100d76ff76477a2ead3aac94d04f2e891f44e;p=linux-2.6 [PATCH] correct slow acpi_pm rating On Bob's machine clocksource is selecting PIT over the ACPI PM timer, because he has the PIIX4 bug. That bug drops the ACPI PM timers rating to the same as the PIT, so that's why you're getting the PIT. Realistically, the PIT is much slower then even the triple read ACPI PM, so the de-ranking code is probably dropping it too far. So don't drop ACPI PM quite so low if we see the PIIX4 bug. Signed-off-by: John Stultz Cc: Bob Tracy Cc: Ingo Molnar Cc: Thomas Gleixner Cc: Andi Kleen Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/drivers/clocksource/acpi_pm.c b/drivers/clocksource/acpi_pm.c index d42060ede9..5ac309ee7f 100644 --- a/drivers/clocksource/acpi_pm.c +++ b/drivers/clocksource/acpi_pm.c @@ -90,7 +90,7 @@ __setup("acpi_pm_good", acpi_pm_good_setup); static inline void acpi_pm_need_workaround(void) { clocksource_acpi_pm.read = acpi_pm_read_slow; - clocksource_acpi_pm.rating = 110; + clocksource_acpi_pm.rating = 120; } /*