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From: Avi Kivity <avi-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
To: kvm-devel <kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org>
Subject: [ANNOUNCE] kvm-44 release
Date: Sun, 23 Sep 2007 16:25:34 +0200	[thread overview]
Message-ID: <46F6775E.3010508@qumranet.com> (raw)

An important fix to guest smp (it boots now!), and a performance 
improvement on Intel hardware.  I get about 5% boost on a kernel build.

There's a new module parameter to kvm-intel.ko that can disable this 
mechanism, bypass_guest_pf.  Load the module with bypass_guest_pf=0 to 
disable the optimization.  It shouldn't be necessary to do that on 
current processors; it's mostly to protect kvm against changes in 
hardware since the patch uses reserved bits.

As usual, if you have an issue please try with -no-kvm-irqchip and report.

Changes from kvm-43:
- fix smp guest boot
- fix IDE emulation bug with newer guest kernels (S.Çağlar Onur)
- support VMware server as guest (Ryan Harper)
- fix smp race in shadow code (Izik Eidus)
- allow guest page faults to bypass kvm on Intel (performance boost)

Notes:
     If you use the modules bundled with kvm-44, you can use any version
of Linux from 2.6.9 upwards.
     If you use the modules bundled with Linux 2.6.20, you need to use
kvm-12.
     If you use the modules bundled with Linux 2.6.21, you need to use
kvm-17.
     Modules from Linux 2.6.22 and up will work with any kvm version from
kvm-22.  Some features may only be available in newer releases.
     For best performance, use Linux 2.6.23-rc2 or later as the host.

http://kvm.qumranet.com



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             reply	other threads:[~2007-09-23 14:25 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-09-23 14:25 Avi Kivity [this message]
     [not found] ` <46F6775E.3010508-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
2007-09-23 19:48   ` [ANNOUNCE] kvm-44 release Farkas Levente
     [not found]     ` <46F6C2FA.7080303-lWVWdrzSO4GHXe+LvDLADg@public.gmane.org>
2007-09-24  7:43       ` Avi Kivity
     [not found]         ` <46F76AA1.1090200-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
2007-09-24  8:05           ` Farkas Levente
     [not found]             ` <46F76FBA.1040907-lWVWdrzSO4GHXe+LvDLADg@public.gmane.org>
2007-09-24  8:18               ` Avi Kivity
     [not found]                 ` <46F772D0.7050102-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
2007-09-24  8:37                   ` Farkas Levente

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