similar to: CPU Hot Plug/Unplug with KVM on CentOS

Hi, i'm playing a bit around with vcpus. My guest is Windows 10 1903. This is the excerpt from the config: ... <vcpu placement='static' current='2'>4</vcpu> <vcpus> <vcpu id='0' enabled='yes' hotpluggable='no'/> <vcpu id='1' enabled='yes' hotpluggable='yes'/> <vcpu id='2'

On Fri, Feb 14, 2020 at 16:05:00 +0100, Lentes, Bernd wrote: > Hi, > > i'm playing a bit around with vcpus. > My guest is Windows 10 1903. > This is the excerpt from the config: > ... > <vcpu placement='static' current='2'>4</vcpu> > <vcpus> > <vcpu id='0' enabled='yes' hotpluggable='no'/> >

Am 05.11.14 11:48, schrieb Martin Kletzander: > On Wed, Nov 05, 2014 at 11:35:37AM +0100, Thomas Stein wrote: >>Hello. >> >>I'm struggeling a little bit with the setvcpus command. I'm trying now >>to get this running for a linux VM. Here is what i have: >> >> <vcpu placement='auto' current='2'>4</vcpu> >> >>Now

Hi, We know that there is a command "setvcpus" in virsh used to "change number of virtual CPUs", now we just have the need to change vcpu count dynamically for a running VM, so I tried this command (the vcpu count is 2 in the VM xml file), below is the result: virsh # setvcpus 3 --count 4 error: invalid argument: requested vcpus is greater than max allowable vcpus for the

On Fri, Oct 12, 2018 at 19:33:54 +0200, Milan Zamazal wrote: > Hi, when working on hot unplugs of various devices, I've found out that > hot unplugging <lease> device doesn't generate > VIR_DOMAIN_EVENT_ID_DEVICE_REMOVED event. <lease> also doesn't have an > alias, so it wouldn't be identifiable in the corresponding callback. > > Is this difference

On Mon, Oct 15, 2018 at 09:56:39 +0200, Milan Zamazal wrote: > Peter Krempa <pkrempa@redhat.com> writes: > > > On Fri, Oct 12, 2018 at 19:33:54 +0200, Milan Zamazal wrote: > >> Hi, when working on hot unplugs of various devices, I've found out that > >> hot unplugging <lease> device doesn't generate > >> VIR_DOMAIN_EVENT_ID_DEVICE_REMOVED

On 4/13/2015 1:18 PM, Kashyap Chamarthy wrote: > On Mon, Apr 13, 2015 at 12:14:12PM +0530, Jatin Davey wrote: >> Hi All >> >> I am new to KVM world. I have been using VMware for about a year. >> >> In VMware world we can reserve cpu resources for a VM. Say for instance if >> we need 4 vCPUs with a total of 8000 GHz then we can mention this >>

Hi, when working on hot unplugs of various devices, I've found out that hot unplugging <lease> device doesn't generate VIR_DOMAIN_EVENT_ID_DEVICE_REMOVED event. <lease> also doesn't have an alias, so it wouldn't be identifiable in the corresponding callback. Is this difference from other hotpluggable devices intentional? If yes, is there any better way of checking

On 05/28/2013 01:24 AM, Dennis Chen wrote: > Hi, > > We know that there is a command "setvcpus" in virsh used to "change > number of virtual CPUs", now we just have the need to change vcpu count > dynamically for a running VM, so I tried this command (the vcpu count is > 2 in the VM xml file), below is the result: > > virsh # setvcpus 3 --count 4 >

On Mon, Apr 13, 2015 at 01:41:59PM +0530, Jatin Davey wrote: > On 4/13/2015 1:18 PM, Kashyap Chamarthy wrote: > >On Mon, Apr 13, 2015 at 12:14:12PM +0530, Jatin Davey wrote: > >>Hi All > >> > >>I am new to KVM world. I have been using VMware for about a year. > >> > >>In VMware world we can reserve cpu resources for a VM. Say for instance if

Peter Krempa <pkrempa@redhat.com> writes: > On Fri, Oct 12, 2018 at 19:33:54 +0200, Milan Zamazal wrote: >> Hi, when working on hot unplugs of various devices, I've found out that >> hot unplugging <lease> device doesn't generate >> VIR_DOMAIN_EVENT_ID_DEVICE_REMOVED event. <lease> also doesn't have an >> alias, so it wouldn't be

Hello. I'm struggeling a little bit with the setvcpus command. I'm trying now to get this running for a linux VM. Here is what i have: <vcpu placement='auto' current='2'>4</vcpu> Now the VM is starting with 2 CPUs. When i try to increase the number of CPUs i get: setvcpus dev --guest 4 error: invalid argument: requested vcpu count is greater than the count

On Wed, Nov 05, 2014 at 11:35:37AM +0100, Thomas Stein wrote: >Hello. > >I'm struggeling a little bit with the setvcpus command. I'm trying now >to get this running for a linux VM. Here is what i have: > > <vcpu placement='auto' current='2'>4</vcpu> > >Now the VM is starting with 2 CPUs. When i try to increase the number of >CPUs i

Am 05.11.14 14:48, schrieb Eric Blake: > On 11/05/2014 01:20 PM, Thomas Stein wrote: >> Am 05.11.14 11:48, schrieb Martin Kletzander: >>> On Wed, Nov 05, 2014 at 11:35:37AM +0100, Thomas Stein wrote: >>>> Hello. >>>> >>>> I'm struggeling a little bit with the setvcpus command. I'm trying now >>>> to get this running for a

Dear All, I have installed the current version of Slackware Linux which includes samba-2.2.8a. My previous system had samba-2.0.7 with the utmp patch by David Lee applied. The original/patched utmp support had a 'utmp hostname' parameter to select between logging by hostname or netbios name. This very useful parameter is missing from 2.2.8a. IMHO this is a real pity. Is this an oversight

Am 09.08.13 15:09, schrieb Eric Blake: > On 08/09/2013 06:26 AM, Thomas Stein wrote: >> Hello. >> >> Does someone know in what state setvcpu command is? >> >> I get: >> >> virsh # setvcpus gentookvm 4 >> error: internal error: cannot change vcpu count of this domain >> >> and >> >> error : qemuDomainHotplugVcpus:4087 :

On Thu, Apr 23, 2020 at 01:37:17PM +0100, Stefan Hajnoczi wrote: > A virtio_blk block device can still be referenced after hot unplug by > userspace processes that hold the file descriptor. In this case > virtblk_getgeo() can be invoked after virtblk_remove() was called. For > example, a program that has /dev/vdb open can call ioctl(HDIO_GETGEO) > after hot unplug. > > Fix

"Michael S. Tsirkin" <mst at redhat.com> writes: > On device hot-unplug, 9p/virtio currently will kfree channel while > it might still be in use. > > Of course, it might stay used forever, so it's an extremely ugly hack, > but it seems better than use-after-free that we have now. > > Signed-off-by: Michael S. Tsirkin <mst at redhat.com> I'll

"Michael S. Tsirkin" <mst at redhat.com> writes: > On device hot-unplug, 9p/virtio currently will kfree channel while > it might still be in use. > > Of course, it might stay used forever, so it's an extremely ugly hack, > but it seems better than use-after-free that we have now. > > Signed-off-by: Michael S. Tsirkin <mst at redhat.com> I'll

On Thu, Mar 12, 2015 at 11:54:10AM +1030, Rusty Russell wrote: > "Michael S. Tsirkin" <mst at redhat.com> writes: > > On device hot-unplug, 9p/virtio currently will kfree channel while > > it might still be in use. > > > > Of course, it might stay used forever, so it's an extremely ugly hack, > > but it seems better than use-after-free that we