Bug 192212 - "cat /sys/hypervisor/properties/writable_pt" returns 0
Summary: "cat /sys/hypervisor/properties/writable_pt" returns 0
Keywords:
Status: CLOSED NOTABUG
Alias: None
Product: Fedora
Classification: Fedora
Component: kernel-xen
Version: rawhide
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Markus Armbruster
QA Contact: Brian Brock
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2006-05-18 13:21 UTC by Stephen Tweedie
Modified: 2007-11-30 22:11 UTC (History)
1 user (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2006-05-18 13:45:20 UTC
Type: ---
Embargoed:

Attachments (Terms of Use)

Description Stephen Tweedie 2006-05-18 13:21:34 UTC 
Description of problem:
# # cat /sys/hypervisor/properties/writable_pt
0

but the hypervisor should be providing writable page tables and the kernel
should be using them.  Something is breaking down in the path between the
hypervisor XENVER_get_features hypervall and the sysfs output.

Version-Release number of selected component (if applicable):

2.6.16-1.2203_FC6xen0.i686
but it happens as far back as FC5 too.


How reproducible:
100%

Steps to Reproduce:
1. cat /sys/hypervisor/properties/writable_pt
  
Actual results:
0

Expected results:
1
Comment 1 Markus Armbruster 2006-05-18 13:45:20 UTC 
Expected result is 1 only in shadow mode. So the actual result is actually correct.
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