Re: [Xen-users] extra = "mem=1024" and maxmem

[tgh <tianguanhua@xxxxxxxxxx>]

hi
   I try to do it in the xen-3.1.0,but it does NOT work,or are  there 
something I should do?
   does it work in the xen-3.1.0?
  
   the config file:
kernel = "/boot/vmlinuz-2.6.16-xenU"
memory = 256
maxmem = 512
name = "dom7"
vcpus = 1
vif = [ '' ]
disk = [ 'file:/vm/dom7.img,sda1,w' ]
netmask = "255.255.0.0"
gateway = "192.168.150.1"
hostname = "domp"
ip = "192.168.100.202"
root = "/dev/sda1 ro"
extra = "4"
extra = "mem = 512M"

what should I do?
could you help me

Thanks in advance





Jayson Vantuyl åé:
> I'm not sure.
>
> I use it on 3.0.4-tip.  I do not know if it works with earlier versions.
>
> On May 15, 2007, at 6:47 PM, tgh wrote:
>
> > hi
> > I am using xen-3.0.3,and I try to set "memory" and "maxmem" following 
> > your discussion,but it does work as expected
> > Does it only work in xen-3.0.4 and later version,or what should I do ?
> >
> > could you help me
> > Thanks in advance
> >
> >
> > Jayson Vantuyl åé:
> > > There are really three options.
> > >
> > >
> > > 'extra= "mem=1024"' tells the kernel inside of the domain that it 
> > > only has a 1GB of memory. This is really not the way to do this. 
> > > Instead use memory=1024.
> > > "maxmem" tells the hypervisor and the kernel inside of the domain 
> > > how large it could get. This can be adjusted at any time, but Linux 
> > > domains don't use it after boot time. The advantage of using this 
> > > option is that the Linux inside of the domain sizes its internal 
> > > tables so it can grow to that size. This means that you can 
> > > dynamically change the amount of memory available inside of the domain.
> > > For example, if you have these options for a domain:
> > >
> > > memory=1024
> > > maxmem=4096
> > >
> > > You will have the kernel boot up with 1GB of memory. At any point 
> > > you can increase it to, for example, 2 GB with this command:
> > > xm mem-set <domain> 2048
> > >
> > > The kernel will automagically increase to 2GB of RAM. This is, as 
> > > you might imagine, extremely cool.
> > > Also, you can always size down a domain below its initial RAM usage 
> > > to free up memory it is not using, which can be handy on busy or 
> > > complex production servers.
> > > On May 15, 2007, at 4:43 AM, Denny Schierz wrote:
> > >
> > > > hi,
> > > >
> > > > what is the different between the domU config parameter:
> > > >
> > > > [...]
> > > > extra = "mem=1024"
> > > > [..]
> > > >
> > > >
> > > > and
> > > >
> > > > [...]
> > > > maxmem="1024"
> > > > [...]
> > > >
> > > > is maxmem only available on 3.0.4 and later?
> > > >
> > > > cu denny
> > > >
> > > > _______________________________________________
> > > > Xen-users mailing list
> > > > Xen-users@xxxxxxxxxxxxxxxxxxx <mailto:Xen-users@xxxxxxxxxxxxxxxxxxx>
> > > > http://lists.xensource.com/xen-users
> > >
> > >
> > > --
> > > Jayson Vantuyl
> > > Systems Architect
> > > *Engine Yard <http://www.engineyard.com>*
> > > jvantuyl@xxxxxxxxxxxxxx <mailto:jvantuyl@xxxxxxxxxxxxxx>
> > >
> > >
> > > ------------------------------------------------------------------------
> > >
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> > > Xen-users mailing list
> > > Xen-users@xxxxxxxxxxxxxxxxxxx <mailto:Xen-users@xxxxxxxxxxxxxxxxxxx>
> > > http://lists.xensource.com/xen-users
>
>
> --
> Jayson Vantuyl
> Systems Architect
> *Engine Yard <http://www.engineyard.com>*
> jvantuyl@xxxxxxxxxxxxxx <mailto:jvantuyl@xxxxxxxxxxxxxx>
>
>
> ------------------------------------------------------------------------
>
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