linux-kernel - [PATCH] x86 uv: lower UV rtc clocksource rating

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Message-ID: <20120216201042.GA10260@sgi.com>
Date:	Thu, 16 Feb 2012 14:10:42 -0600
From:	Dimitri Sivanich <sivanich@....com>
To:	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>, John Stultz <johnstul@...ibm.com>
Cc:	x86@...nel.org, linux-kernel@...r.kernel.org,
	Jack Steiner <steiner@....com>
Subject: [PATCH] x86 uv: lower UV rtc clocksource rating

Lower the rating of the UV rtc clocksource to just below that of the tsc.

Signed-off-by: Dimitri Sivanich <sivanich@....com>
---
 arch/x86/platform/uv/uv_time.c |    6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

Index: linux/arch/x86/platform/uv/uv_time.c
===================================================================
--- linux.orig/arch/x86/platform/uv/uv_time.c
+++ linux/arch/x86/platform/uv/uv_time.c
@@ -37,7 +37,7 @@ static void uv_rtc_timer_setup(enum cloc
 
 static struct clocksource clocksource_uv = {
 	.name		= RTC_NAME,
-	.rating		= 400,
+	.rating		= 299,
 	.read		= uv_read_rtc,
 	.mask		= (cycle_t)UVH_RTC_REAL_TIME_CLOCK_MASK,
 	.flags		= CLOCK_SOURCE_IS_CONTINUOUS,
@@ -379,10 +379,6 @@ static __init int uv_rtc_setup_clock(voi
 	if (!is_uv_system())
 		return -ENODEV;
 
-	/* If single blade, prefer tsc */
-	if (uv_num_possible_blades() == 1)
-		clocksource_uv.rating = 250;
-
 	rc = clocksource_register_hz(&clocksource_uv, sn_rtc_cycles_per_second);
 	if (rc)
 		printk(KERN_INFO "UV RTC clocksource failed rc %d\n", rc);
--
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