Red Hat ENTERPRISE LINUX 5.5 - S 2010, Руководство пользователя

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Chapter 1. Package Updates
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• 64-bit guests would hang on an AMD host if one or more of the guest's VCPUs were changed from
offline to online. This issue is resolved in the updated package. (
BZ#525699
1274
and
BZ#517223
1275
)
• When using the virtual
vm8086
mode, bugs in the emulated hardware task switching
implementation may have caused older guest operating systems to malfunction. (
BZ#517324
1276
)
• An "
unhandled vm exit: 0x31 vcpu_id 0
" error message could appear when installing
certain guest operating systems, such as SUSE Linux Enterprise Server 11, using a para-virtualized
block device (virtio-blk). The updated packages resolve this issue and installation with the para-
virtualized drivers is supported and working. (
BZ#518081
1277
)
• The
__kvm_mmu_free_some_pages
list was not verified empty before it was used. The updated
package verifies the
__kvm_mmu_free_some_pages
list is empty before attempting to look at list
entries. (
BZ#519397
1278
)
• Windows Server 2008 64 bit guests use a
cr8
call which executed a
vmexit
call. This caused
performance issues for Windows Server 2008 guests. The updated packages use a different call
method to handle
cr8
calls which significantly improves the performance of Windows Server 2008
64 bit guests. (
BZ#520285
1279
)
• When attempting to resume from hibernate with Windows Server 2003 guests, KVM would
attempt to stop the QEMU emulated audio device which was not activated. This caused a
"
snd_playback_stop: ASSERT playback_channel->base.active failed
" error
message to appear and the resume process to fail and the guest to crash. The updated package
resolves this issue. (
BZ#520394
1280
)
• Time drift may have occurred in Windows guests that use the IOAPIC interrupt for timing. The
updated packages resolve this issue and Windows guests should now keep time accurately.
(
BZ#521025
1281
)
• Windows Server 2003 (32-bit and 64-bit) guests may have experienced time drift. (
BZ#543137
1282
)
• On AMD hosts, Window Server 2008 R2 Datacenter guests would stop during the installation at the
step "
Setup will continue after restarting your computer
". This issue is resolved
and Windows Server 2008 R2 Datacenter guests now successfully install. (
BZ#521749
1283
)
• Resetting the PCI status of a para-virtualized network device (virtio-net) would cause KVM to crash.
This issue is resolved the the updated packages. (
BZ#521829
1284
)
• The German keyboard map was missing some keys in when accessing a guest with VNC. The
German keyboard map now contains all keys when accessing guests with VNC. (
BZ#521835
1285
)
• When a guest issued an Inter-processor Interrupt (IPI) call, the call would cause KVM to issue a
global IPI call on the host. The global IPI call interrupts all processors instead of just those assigned
to the guest. The updated packages resolve the issue by using the kernel's IPI handling functions
instead of emulating the IPI handler. (
BZ#524970
1286
)
• KVM and virtualized guests would become unresponsive due to waiting infinitely for an
aio
threads
to return. The updated packages resolve this issue by correctly timing out threads which do not
return. (
BZ#525114
1287
)
• The host KVM process could crash or use 100% of the allocated CPUs when a guest with more
than one VCPU received high volumes of network traffic through a device using the para-virtualized
network drivers (virtio-net). This issue is resolved in the updated packages. (
BZ#525323
1288
)