From: Andi Kleen <andi@firstfloor.org>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Arjan van de Ven <arjan@infradead.org>,
Dan Magenheimer <dan.magenheimer@oracle.com>,
Thomas Gleixner <tglx@linutronix.de>,
Andi Kleen <andi@firstfloor.org>,
Venkatesh Pallipadi <venki@google.com>,
Ingo Molnar <mingo@elte.hu>, "H. Peter Anvin" <hpa@zytor.com>,
chris.mason@oracle.com, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] x86: Export tsc related information in sysfs
Date: Tue, 18 May 2010 13:25:10 +0200 [thread overview]
Message-ID: <20100518112509.GD22675@basil.fritz.box> (raw)
In-Reply-To: <1274176698.5605.7358.camel@twins>
On Tue, May 18, 2010 at 11:58:18AM +0200, Peter Zijlstra wrote:
> On Sun, 2010-05-16 at 22:06 -0700, Arjan van de Ven wrote:
> > look we're not disabling ring 3 tsc. We could, but we don't.
>
> Maybe we should.
That would kill the vsyscall too. Remember it's running in ring 3.
That is in theory you could disable it on systems where the vsyscall
doesn't use it, but then you would likely break huge amounts of software,
unless you emulate it.
Emulation would be a possibility, but I'm not sure it would
make anyone really happy. It would be certainly slow.
-Andi
--
ak@linux.intel.com -- Speaking for myself only.
next prev parent reply other threads:[~2010-05-18 11:25 UTC|newest]
Thread overview: 80+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-05-15 1:40 [PATCH] x86: Export tsc related information in sysfs Venkatesh Pallipadi
2010-05-15 9:57 ` Andi Kleen
2010-05-15 13:29 ` Dan Magenheimer
2010-05-15 16:48 ` Venkatesh Pallipadi
2010-05-15 19:14 ` Arjan van de Ven
2010-05-15 22:32 ` Dan Magenheimer
2010-05-16 5:43 ` Arjan van de Ven
2010-05-16 9:20 ` Thomas Gleixner
2010-05-16 16:42 ` Dan Magenheimer
2010-05-16 19:14 ` Thomas Gleixner
2010-05-17 1:31 ` Dan Magenheimer
2010-05-17 5:06 ` Arjan van de Ven
2010-05-18 9:58 ` Peter Zijlstra
2010-05-18 10:03 ` Peter Zijlstra
2010-05-18 11:25 ` Andi Kleen [this message]
2010-05-18 11:58 ` Peter Zijlstra
2010-05-18 15:13 ` Dan Magenheimer
2010-05-18 16:40 ` H. Peter Anvin
2010-05-18 16:52 ` Peter Zijlstra
2010-05-18 17:04 ` H. Peter Anvin
2010-05-18 17:49 ` Dan Magenheimer
2010-05-18 18:46 ` H. Peter Anvin
2010-05-18 19:00 ` Dan Magenheimer
2010-05-18 19:16 ` Dan Magenheimer
2010-05-18 19:26 ` H. Peter Anvin
2010-05-18 20:29 ` Dan Magenheimer
2010-05-18 20:34 ` H. Peter Anvin
2010-05-18 21:02 ` Dan Magenheimer
2010-05-18 21:13 ` Andi Kleen
2010-05-19 6:26 ` Peter Zijlstra
2010-05-17 10:20 ` Thomas Gleixner
2010-05-16 20:29 ` Arjan van de Ven
2010-05-17 10:26 ` Andi Kleen
2010-06-04 14:24 ` Pavel Machek
2010-05-15 22:45 ` Thomas Gleixner
2010-05-17 10:22 ` Andi Kleen
2010-05-17 15:23 ` Dan Magenheimer
2010-05-17 16:56 ` Andi Kleen
2010-05-17 22:36 ` Thomas Gleixner
2010-05-17 23:33 ` Dan Magenheimer
2010-05-18 0:00 ` Ingo Molnar
2010-05-18 0:02 ` Ingo Molnar
2010-05-15 12:35 ` Jaswinder Singh Rajput
2010-05-15 14:37 ` Venkatesh Pallipadi
-- strict thread matches above, loose matches on Subject: below --
2010-05-20 19:19 Brian Bloniarz
2010-05-22 2:03 ` john stultz
2010-05-22 3:33 ` H. Peter Anvin
2010-05-24 18:13 ` Dan Magenheimer
2010-05-24 18:19 ` H. Peter Anvin
2010-05-24 18:51 ` john stultz
2010-05-24 20:20 ` H. Peter Anvin
2010-05-24 20:39 ` john stultz
2010-05-24 21:26 ` H. Peter Anvin
2010-05-24 22:04 ` Dan Magenheimer
2010-05-24 22:30 ` H. Peter Anvin
2010-05-24 22:49 ` john stultz
2010-05-24 23:16 ` Dan Magenheimer
2010-05-24 23:19 ` H. Peter Anvin
2010-05-24 23:30 ` john stultz
2010-05-24 23:42 ` Andi Kleen
2010-05-25 0:01 ` Dan Magenheimer
2010-05-25 0:07 ` H. Peter Anvin
2010-05-25 1:33 ` Brian Bloniarz
2010-05-26 0:16 ` Brian Bloniarz
2010-05-26 0:48 ` john stultz
2010-05-26 2:50 ` Brian Bloniarz
2010-05-26 12:35 ` Thomas Gleixner
2010-05-26 14:26 ` Dan Magenheimer
2010-05-26 14:41 ` Thomas Gleixner
2010-05-26 15:04 ` john stultz
2010-05-26 16:02 ` Brian Bloniarz
2010-05-26 16:25 ` john stultz
2010-05-26 18:24 ` H. Peter Anvin
2010-05-26 18:44 ` Brian Bloniarz
2010-05-26 18:51 ` H. Peter Anvin
2010-05-26 20:19 ` john stultz
2010-05-26 21:06 ` H. Peter Anvin
2010-05-26 19:49 ` john stultz
2010-05-26 20:22 ` Brian Bloniarz
2010-05-26 12:30 ` Thomas Gleixner
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