From: "Srivatsa S. Bhat" <srivatsa.bhat@linux.vnet.ibm.com>
To: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>,
H Peter Anvin <hpa@zytor.com>, Ingo Molnar <mingo@elte.hu>,
john stultz <johnstul@us.ibm.com>,
linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: [patch] x86, tsc: skip TSC synchronization checks for tsc=reliable
Date: Tue, 08 Nov 2011 01:06:33 +0530 [thread overview]
Message-ID: <4EB83341.9080600@linux.vnet.ibm.com> (raw)
In-Reply-To: <1320446537.15071.14.camel@sbsiddha-desk.sc.intel.com>
Hi,
On 11/05/2011 04:12 AM, Suresh Siddha wrote:
> tsc=reliable boot parameter is supposed to skip all the TSC stablility
> checks during boot time.
>
> On a 8-socket system where we want to run an experiment with the
> "tsc=reliable" boot option, TSC synchronization checks are not
> getting skipped and marking the TSC as not stable.
>
I was facing this same problem some time back with some of my machines.
> Check for tsc_clocksource_reliable (which is set via tsc=reliable or
> for platforms supporting synthetic TSC_RELIABLE feature bit etc)
> and when set, skip the TSC synchronization tests during boot.
>
This patch fixes the issue. Thanks for the fix!
> Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Tested-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Thanks,
Srivatsa S. Bhat
next prev parent reply other threads:[~2011-11-07 19:36 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-11-04 22:42 [patch] x86, tsc: skip TSC synchronization checks for tsc=reliable Suresh Siddha
2011-11-07 18:06 ` john stultz
2011-11-07 19:36 ` Srivatsa S. Bhat [this message]
2011-12-05 18:03 ` [tip:timers/core] x86, tsc: Skip " tip-bot for Suresh Siddha
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