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Re: [PATCH 1/2] VMware guest detection for x86 and x86-64

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From: Bernd Eckenfels <ecki@...>
To: <linux-kernel@...>
Subject: Re: [PATCH 1/2] VMware guest detection for x86 and x86-64
Date: Wednesday, September 24, 2008 - 9:28 pm

In article <20080925002333.GD21049@yantp.cn.ibm.com> you wrote:

Having a high HZ slows down VMs and also leads to tick loss (time drift). HZ
100 or 250 is recommended by most Vendors.

I think some distributions use the reduced HZ value by default anyway, so
you might never had a problem with this.

It is also only a problem with system load and timekeeping, which is not
always obvious. When running a lot of nearly idle VM Guests you might see
it.

Gruss
Bernd
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Messages in current thread:
[PATCH] X86: remove WARN_ON if MTRRs are all blank, Joerg Roedel, (Thu Feb 21, 7:32 am)
Re: [PATCH] X86: remove WARN_ON if MTRRs are all blank, Ingo Molnar, (Thu Feb 21, 7:54 am)
[PATCH 1/2] VMware detection support for x86 and x86-64, Yan Li, (Sun Sep 7, 7:45 pm)
Re: [PATCH 1/2] VMware detection support for x86 and x86-64, Ingo Molnar, (Mon Sep 8, 10:04 am)
Re: [PATCH 1/2] VMware detection support for x86 and x86-64, Alok kataria, (Wed Sep 24, 10:28 pm)
Re: [PATCH 1/2] VMware detection support for x86 and x86-64, H. Peter Anvin, (Thu Sep 25, 12:38 am)
Re: [PATCH 1/2] VMware detection support for x86 and x86-64, Alok Kataria, (Thu Sep 25, 12:46 am)
Re: [PATCH 1/2] VMware detection support for x86 and x86-64, H. Peter Anvin, (Thu Sep 25, 12:54 am)
Re: [PATCH 1/2] VMware detection support for x86 and x86-64, Alok Kataria, (Thu Sep 25, 1:02 am)
Re: [PATCH 1/2] VMware detection support for x86 and x86-64, H. Peter Anvin, (Thu Sep 25, 1:04 am)
Re: [PATCH 1/2] VMware detection support for x86 and x86-64, Alok Kataria, (Thu Sep 25, 1:23 am)
Re: [PATCH 1/2] VMware detection support for x86 and x86-64, Zachary Amsden, (Thu Sep 25, 4:48 pm)
Re: [PATCH 1/2] VMware detection support for x86 and x86-64, David Sanders, (Thu Sep 25, 6:17 pm)
Re: [PATCH 1/2] VMware detection support for x86 and x86-64, H. Peter Anvin, (Thu Sep 25, 5:59 pm)
Re: [PATCH 1/2] VMware detection support for x86 and x86-64, Zachary Amsden, (Thu Sep 25, 6:20 pm)
Re: [PATCH 1/2] VMware detection support for x86 and x86-64, H. Peter Anvin, (Thu Sep 25, 6:27 pm)
Re: [PATCH 1/2] VMware detection support for x86 and x86-64, Gerd Hoffmann, (Fri Sep 26, 8:47 am)
Re: [PATCH 1/2] VMware detection support for x86 and x86-64, , (Fri Sep 26, 9:22 am)
Re: [PATCH 1/2] VMware detection support for x86 and x86-64, Zachary Amsden, (Fri Sep 26, 4:35 pm)
Re: [PATCH 1/2] VMware detection support for x86 and x86-64, H. Peter Anvin, (Fri Sep 26, 1:37 pm)
Re: [PATCH 1/2] VMware detection support for x86 and x86-64, Pavel Machek, (Fri Oct 3, 10:12 am)
Re: [PATCH 1/2] VMware detection support for x86 and x86-64, , (Fri Sep 26, 8:27 am)
Re: [PATCH 1/2] VMware detection support for x86 and x86-64, Alan Cox, (Thu Sep 25, 4:45 am)
Re: [PATCH 1/2] VMware detection support for x86 and x86-64, H. Peter Anvin, (Thu Sep 25, 1:30 am)
Re: [PATCH 1/2] VMware detection support for x86 and x86-64, Yan Li, (Mon Sep 8, 8:20 pm)
Re: [PATCH 1/2] VMware detection support for x86 and x86-64, H. Peter Anvin, (Mon Sep 8, 8:34 pm)
Re: [PATCH 1/2] VMware detection support for x86 and x86-64, Yan Li, (Tue Sep 16, 9:32 am)
Re: [PATCH 1/2] VMware detection support for x86 and x86-64, Ingo Molnar, (Wed Sep 17, 6:52 am)
Re: [PATCH 1/2] VMware detection support for x86 and x86-64, Yan Li, (Wed Sep 17, 10:03 am)
Re: [PATCH 1/2] VMware detection support for x86 and x86-64, Ingo Molnar, (Wed Sep 17, 10:10 am)
Re: [PATCH 1/2] VMware detection support for x86 and x86-64, H. Peter Anvin, (Wed Sep 17, 11:38 am)
[PATCH 1/2] VMware guest detection for x86 and x86-64, Yan Li, (Wed Sep 24, 8:22 am)
Re: [PATCH 1/2] VMware guest detection for x86 and x86-64, Greg KH, (Wed Sep 24, 10:23 pm)
Re: [PATCH 1/2] VMware guest detection for x86 and x86-64, Yan Li, (Wed Sep 24, 10:47 pm)
Re: [PATCH 1/2] VMware guest detection for x86 and x86-64, Greg KH, (Wed Sep 24, 10:55 pm)
Re: [PATCH 1/2] VMware guest detection for x86 and x86-64, H. Peter Anvin, (Thu Sep 25, 12:54 am)
Re: [PATCH 1/2] VMware guest detection for x86 and x86-64, Yan Li, (Thu Sep 25, 10:38 am)
Re: [PATCH 1/2] VMware guest detection for x86 and x86-64, Greg KH, (Thu Sep 25, 8:56 am)
Re: [PATCH 1/2] VMware guest detection for x86 and x86-64, Yan Li, (Wed Sep 24, 11:29 pm)
Re: [PATCH 1/2] VMware guest detection for x86 and x86-64, H. Peter Anvin, (Wed Sep 24, 12:19 pm)
Re: [PATCH 1/2] VMware guest detection for x86 and x86-64, Yan Li, (Wed Sep 24, 8:32 pm)
Re: [PATCH 1/2] VMware guest detection for x86 and x86-64, David Sanders, (Thu Sep 25, 5:56 am)
Re: [PATCH 1/2] VMware guest detection for x86 and x86-64, Yan Li, (Thu Sep 25, 6:23 am)
Re: [PATCH 1/2] VMware guest detection for x86 and x86-64, H. Peter Anvin, (Wed Sep 24, 8:37 pm)
Re: [PATCH 1/2] VMware guest detection for x86 and x86-64, Yan Li, (Wed Sep 24, 10:48 pm)
Re: [PATCH 1/2] VMware guest detection for x86 and x86-64, Cristi Magherusan, (Wed Sep 24, 10:10 am)
Re: [PATCH 1/2] VMware guest detection for x86 and x86-64, Yan Li, (Wed Sep 24, 10:23 am)
Re: [PATCH 1/2] VMware guest detection for x86 and x86-64, Cristi Magherusan, (Wed Sep 24, 2:13 pm)
Re: [PATCH 1/2] VMware guest detection for x86 and x86-64, Yan Li, (Wed Sep 24, 8:23 pm)
Re: [PATCH 1/2] VMware guest detection for x86 and x86-64, Bernd Eckenfels, (Wed Sep 24, 9:28 pm)
Re: [PATCH 1/2] VMware guest detection for x86 and x86-64, H. Peter Anvin, (Wed Sep 24, 2:16 pm)
Re: [PATCH 1/2] VMware guest detection for x86 and x86-64, Alok kataria, (Wed Sep 24, 12:19 pm)
Re: [PATCH 1/2] VMware guest detection for x86 and x86-64, Yan Li, (Wed Sep 24, 8:15 pm)
Re: [PATCH 1/2] VMware guest detection for x86 and x86-64, H. Peter Anvin, (Wed Sep 24, 8:26 pm)
Re: [PATCH 1/2] VMware guest detection for x86 and x86-64, Yan Li, (Wed Sep 24, 10:34 pm)
Re: [PATCH 1/2] VMware guest detection for x86 and x86-64, H. Peter Anvin, (Wed Sep 24, 12:21 pm)
Re: [PATCH 1/2] VMware guest detection for x86 and x86-64, Yan Li, (Wed Sep 24, 8:19 pm)
Re: [PATCH 1/2] VMware detection support for x86 and x86-64, Yan Li, (Tue Sep 9, 8:28 am)
Re: [PATCH 1/2] VMware detection support for x86 and x86-64, H. Peter Anvin, (Tue Sep 9, 4:12 pm)
Re: [PATCH 1/2] VMware detection support for x86 and x86-64, David Dillow, (Sun Sep 7, 8:36 pm)
Re: [PATCH 1/2] VMware detection support for x86 and x86-64, Yan Li, (Sun Sep 7, 9:49 pm)
[PATCH 2/2] avoid mtrr warning message when running as VMwar..., Yan Li, (Sun Sep 7, 7:47 pm)
Re: [PATCH] X86: remove WARN_ON if MTRRs are all blank, Joerg Roedel, (Thu Feb 21, 8:47 am)
Re: [PATCH] X86: remove WARN_ON if MTRRs are all blank, Ingo Molnar, (Thu Feb 21, 9:03 am)
Re: [PATCH] X86: remove WARN_ON if MTRRs are all blank, Joerg Roedel, (Thu Feb 21, 9:27 am)