xapi-2.0) VDIの差分Export

Re: [Xen-API] VDI import/export with deltas
http://lists.xen.org/archives/html/xen-api/2014-08/msg00053.html

VDIの差分Exportがxapi-2.0で利用できるそうだ。

 > - VDI "diff" export: any VDI, delta since a precise snapshot

 That’s right.

Exporting only block changes/deltas
http://wiki.xensource.com/wiki/Disk_import/export_APIs#Exporting_only_block_changes.2Fdeltas

Xen x86/paging, x86/cpu など修正MEMO

[Xen-changelog] [xen stable-4.4] x86/paging: make log-dirty operations preemptible
http://lists.xen.org/archives/html/xen-changelog/2014-08/msg00078.html

なんか複雑そうね。

 [Xen-changelog] [xen master] Revert "x86/paging: make log-dirty operations preemptible"
 http://lists.xen.org/archives/html/xen-changelog/2014-08/msg00083.html
 This fix has been discovered to cause regressions.  Investigations are ongoing.

[Xen-changelog] [xen stable-4.4] x86/cpu: undo BIOS CPUID max_leaf limit before querying for features
http://lists.xen.org/archives/html/xen-changelog/2014-08/msg00065.html

 If IA32_MISC_ENABLE[22] is set by the BIOS, CPUID.0.EAX will be limited to 3.
 Lift this limit before considering whether to query CPUID.7[ECX=0].EBX for features.

MirageOSのMEMO

Re: [Xen-API] [MirageOS-devel] xen dev summit talk slides: Branch Consistency for Xenstore
http://lists.xen.org/archives/html/xen-api/2014-08/msg00027.html

MirageOSについてMEMOしておきます。


MirageOSのMLはココ
MirageOS-devel -- Developer list for MirageOS
http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel

Long latency virtual-mmu operations are not preemptible

[Xen-users] Xen Security Advisory 97 (CVE-2014-5146, CVE-2014-5149) - Long latency virtual-mmu operations are not preemptible
http://lists.xen.org/archives/html/xen-users/2014-08/msg00043.html

ISSUE DESCRIPTION
=================
Some MMU virtualization operations on HVM guests must process every
page assigned to a guest.  For larger guests, this can tie up a vcpu
for a significant amount of time, as the operations are not
preemptible.
For guests using Hardware Assisted Paging (HAP, see below) this is
CVE-2014-5146.  For guests not using HAP this is CVE-2014-5149.
IMPACT
======
A malicious HVM guest with a large allocation of shadow/p2m RAM
can mount a denial of service attack affecting the whole system.

x86上のHVMが影響。あまりないケースだろうけど。

Xen Project User Summit

Xen Project User Summit 
http://events.linuxfoundation.org/events/xen-project-user-summit/program/schedule
New York, NY
September 15, 2014

XenServer Creedence: XenServer One Year After Being Open-Sourced
Tim Mackey, XenServer Community Manager (Citrix), brings us the latest
information about the XenServer refresh coming with the Creedence
release.  Anyone using or considering XenServer will want to hear
this.

ちょっと聞いてみたい。