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Re: [Xen-users] hvm rtc always set to utc

  • To: "Xen Users" <xen-users@xxxxxxxxxxxxxxxxxxx>
  • From: Derek <xen@xxxxxxxxxxxxxxxx>
  • Date: Tue, 11 Sep 2007 10:41:22 -0600
  • Delivery-date: Tue, 11 Sep 2007 09:49:05 -0700
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Hi all,
Does anybody know the status of this problem?  I just upgraded from 3.0.4 to 3.1.0, hoping that it would contain a fix, but apparently it does not.  Or perhaps there's some component other than Xen that I need to upgrade?  Some library, or something?
The problem is that there's a configuration parameter:
    localtime = 1
That's supposed to set the emulated Realtime clock seen by HVM DomUs to local time rather than UTC.
Unfortunately, as of 3.1.0, it seems to still not work.  I have localtime=1 in my DomU's config file.  DomU is windowsXP, which expects to see local time in RTC, yet the time I see displayed on my Windows screen is UTC.
Any clues?
PS:  There's a workaround kludge I've tried, that involves setting a windows registry flag to tell it to expect UTC in the RTC.  Unfortunately, this workaround is not fully implemented in windows, so it only works some of the time.

On 3/21/07, Ross S. W. Walker <rwalker@xxxxxxxxxxxxx> wrote:


I don't know if there is a fix for this yet, but it seems the localtime=1 option is either being ignored or not being handled properly for hvm guests. It is always setting the rtc to utc despite the localtime option.

Platform: CentOS 4.4 x86_64

dom0 time is correct, timezone set properly, rtc is at utc.


Ross S. W. Walker
Information Systems Manager
Medallion Financial, Corp.
437 Madison Avenue
38th Floor
New York, NY 10022
Tel: (212) 328-2165
Fax: (212) 328-2125
WWW: http://www.medallion.com

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