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

[tgh <tianguanhua@xxxxxxxxxx>]

hi
I am sorry for misspelling 
It does not work in xen-3.0.3 ,I missed the NOT in the last mail
Does it work in xen-3.0.4,or what should I do?

Thanks



tgh 写道:
> 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 写道:
> > 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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