RE: [Xen-devel] memory size inside domU less than memory in domU config

[Dan Magenheimer <dan.magenheimer@xxxxxxxxxx>]

I'm not sure, but I think Vasiliy's question is:

Why/where is 78MB of memory being "wasted"?  If one specifies
2048MB (4096MB) of memory for the guest, why doesn't the guest
kernel report 2048MB (4096MB)?

Using Vasiliy's /proc/meminfo output from below:
2048MB = 2097152KB; - 2016564KB = 80588KB = 78MB
4096MB = 4194304KB; - 4113716KB = 80588KB = 78MB

Dan

Thanks... for the memory!
I really could use more / my throughput's on the floor
The balloon is flat / my swap disk's fat / I've OOM's in store
Overcommitted so much
(with apologies to Bob Hope)


> -----Original Message-----
> From: Vasiliy G Tolstov [mailto:v.tolstov@xxxxxxxxx]
> Sent: Thursday, June 16, 2011 12:45 PM
> To: Konrad Rzeszutek Wilk
> Cc: xen-devel@xxxxxxxxxxxxxxxxxxx
> Subject: Re: [Xen-devel] memory size inside domU less than memory in domU 
> config
> 
> On Thu, 2011-06-16 at 14:40 -0400, Konrad Rzeszutek Wilk wrote:
> > On Thu, Jun 16, 2011 at 10:19:10PM +0400, Vasiliy G Tolstov wrote:
> > > Hello. I'm try to use linux-3.0.0-rc1 in domU.
> > > Domain created with memory=2048 and maxmemory=4096. Inside domU i have
> > > cat /proc/meminfo  | grep MemTotal
> > > MemTotal:        2016564 kB
> > >
> > > Why. Kernel boot log and config in attached files. How can i minimize
> > > memory difference with config value and inside domU?
> >
> > Well, ballon it up? xl mem-set <domain id> 4096 ?
> >
> cat /proc/meminfo  | grep MemTotal
> MemTotal:        4113716 kB
> 
> 
> 
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