[Xen-bugs] [Bug 1593] New: [ACPI] File system become read-only after Dom0 S3 resume with Intremap enabled

[bugzilla-daemon@xxxxxxxxxxxxxxxxxxx]

http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=1593

           Summary: [ACPI] File system become read-only after Dom0 S3 resume
                    with Intremap enabled
           Product: Xen
           Version: unstable
          Platform: All
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Hypervisor
        AssignedTo: xen-bugs@xxxxxxxxxxxxxxxxxxx
        ReportedBy: jiajun.xu@xxxxxxxxx


Environment:
------------
Service Arch (ia32/ia32e/IA64): ia32/ia32e
Guest Arch (ia32/ia32e/IA64): 
Guest OS Type (Linux/Windows):
Change Set: 21047
Hardware: Gulftown-HEDT
Other:
xen-changeset:   21047:c5e1a0b720ba

pvops git:
commit 9b258d14a9f01b6be210aeaf55e39c51c48ba58e
Merge: bf3f745... f4be29f...
Author: Jeremy Fitzhardinge <jeremy.fitzhardinge@xxxxxxxxxx>

ioemu git:
commit 435718fb726b80462b4028128301dcf92214cc6a
Author: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
Date:   Thu Mar 18 16:48:03 2010 +0000

Bug detailed description:
--------------------------
With latest Dom0 S3 fixing, Gulftown-HEDT can do Dom0 S3 successfully. But file
system becomes read-only after Dom0 S3 resume. If we disable intremap in Xen
cmdline, there will be no such issue.

You can run following script to reproduce the bug:
####
#!/bin/sh
set -x
time=1
i=0

echo "S3 start" > /tmp/S3_log

while [ $i -lt $time ];
do
        # For kernel beyond 2.6.22
        echo 0 > /sys/class/rtc/rtc0/wakealarm
        #echo `date '+%s' -d '+ 20 sec'` > /sys/class/rtc/rtc0/wakealarm
        # Another syntax
        echo +30 > /sys/class/rtc/rtc0/wakealarm

        # For kernel below 2.6.22
        #echo +0000-00-00 00:00:25 > /proc/acpi/alarm

        echo mem > /sys/power/state

        # Some machine may need vtetool to resume video display
        #vbetool post
        sync
        ((i=i+1))
        echo $i > /tmp/S3_log
        sync
done

echo "S3 End Normally :-)" >> /tmp/S3_log
####


Reproduce steps:
----------------
1. Enable Intremap in BIOS and Xen cmdline
2. boot into system and run Dom0 S3


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