[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Qemu-devel] [Bug 1297651] [NEW] KVM create a win7 guest with Qemu,

From: Eduardo Habkost
Subject: Re: [Qemu-devel] [Bug 1297651] [NEW] KVM create a win7 guest with Qemu, it boots up fail
Date: Wed, 26 Mar 2014 12:06:38 -0300
User-agent: Mutt/1.5.21 (2010-09-15)

On Wed, Mar 26, 2014 at 04:54:31PM +0200, Michael S. Tsirkin wrote:
> On Wed, Mar 26, 2014 at 02:48:29PM +0100, Igor Mammedov wrote:
> > more clean would be to abort if CPON index (i.e. APIC ID)
> > is more than 255. That would affect small number of weird
> > topologies but sould be fine for most usecases.
> Any idea how to trigger this behaviour?

Set sockets and/or cores to a 2^n+1 value. It will use n+1 bits for the
socket ID and core ID, making APIC ID larger than CPU index. You can get
a very large APIC ID if you use, for example:

  -smp 1,cores=17,threads=17,maxcpus=200

There's code to limit the maximum APIC ID and abort if it is too large,
already (so the above command-line will make QEMU abort). If we want to
limit APIC IDs to <255 instead of <256, we just need to change


reply via email to

[Prev in Thread] Current Thread [Next in Thread]