[Xen-bugs] [Bug 1530] New: Live Migration with md5sum running cause dma_timer_expiry error in guest

[bugzilla-daemon@xxxxxxxxxxxxxxxxxxx]

http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=1530

           Summary: Live Migration with md5sum running cause
                    dma_timer_expiry error in guest
           Product: Xen
           Version: unstable
          Platform: All
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Tools
        AssignedTo: xen-bugs@xxxxxxxxxxxxxxxxxxx
        ReportedBy: jiajun.xu@xxxxxxxxx


Environment:
------------
Service Arch (ia32/ia32e/IA64): ia32e
Guest Arch (ia32/ia32e/IA64): ia32e
Guest OS Type (Linux/Windows): Linux
Change Set: 20330
Hardware: NHM-HEDT
Other:

xen-changeset:   20330:0705efd9c69e

pvops git:
commit 2afad356210ac35cbbc81904e0ac8b514b7f6212
Merge: 9fa9003... 907d20f...
Author: Jeremy Fitzhardinge <jeremy.fitzhardinge@xxxxxxxxxx>

ioemu git:
commit 71324566f3b95bb88105659439adaef1d5bd155c
Author: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
Date:   Tue Oct 13 18:16:42 2009 +0100

Guest OS: x86_64 RHEL5.3
memory: 1024
cpu: 2

Bug detailed description:
--------------------------
When live migration a guest with md5sum running in the guest, guest will meet
dma_timer_expiry and interrupt lost for emulated disk.

Guest dmesg info:
########
hda: dma_timer_expiry: dma status == 0x24
hda: DMA interrupt recovery
hda: lost interrupt
hda: dma_intr: status=0xd8 { Busy }
ide: failed opcode was: unknown
hda: DMA disabled
ide0: reset: success
vif vif-0: 2 parsing device/vif/0/mac
hda: lost interrupt
hda: lost interrupt
hda: lost interrupt
hda: lost interrupt
hda: lost interrupt
hda: lost interrupt
vif vif-0: 2 parsing device/vif/0/mac
hda: lost interrupt
hda: lost interrupt
hda: lost interrupt
hda: lost interrupt
hda: lost interrupt
hda: lost interrupt
hda: lost interrupt
hda: status error: status=0x58 { DriveReady SeekComplete DataRequest }
ide: failed opcode was: unknown
hda: drive not ready for command
hda: status error: status=0x58 { DriveReady SeekComplete DataRequest }
ide: failed opcode was: unknown
hda: drive not ready for command
hda: status error: status=0x58 { DriveReady SeekComplete DataRequest }
ide: failed opcode was: unknown
hda: drive not ready for command
hda: status error: status=0x58 { DriveReady SeekComplete DataRequest }
ide: failed opcode was: unknown
hda: drive not ready for command
ide0: reset: success
########

We should run a md5sum program in guest:
########
dd if=/dev/zero of=./test.img bs=1M count=1 seek=1023
while [ 1 ]
do
    md5sume test.img
done
########


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