Hi, I thought it would be possible to increase the size of running domU using "xm balloon" but I can only change the memory up to the value specified in config file (the initial memory size). Maybe I''m doing something wrong or I am missing something? What a tried: dev (3) is the domU is used for testing in this case but it is not limited to this domU - it happends for all of them... nd:/etc/network# xm list Name Id Mem(MB) CPU State Time(s) Console Domain-0 0 27 0 r---- 18.0 bb1 2 63 0 -b--- 6.6 9602 dev 3 127 0 -b--- 1.7 9603 The machine has 512M memory so there should be some memory left to use: nd:/etc/network# xm info system : Linux host : nd release : 2.6.11.10-xen0 version : #2 Fri Jun 24 21:24:58 CEST 2005 machine : i686 cores : 1 hyperthreads_per_core : 1 cpu_mhz : 2392 memory : 503 free_memory : 201 So in theory it be possible to increase the memory by around 200MB... Lets try to 128M from this and give "dev" a total memory of 256: nd:/etc/network# xm balloon dev 256 nd:/etc/network# xm list Name Id Mem(MB) CPU State Time(s) Console Domain-0 0 27 0 r---- 18.5 bb1 2 63 0 -b--- 6.6 9602 dev 3 127 0 -b--- 1.7 9603 Hmmmm... this didn''t worked... Host has still 128M... "xm info" also gives same results as before. I''m using 2.6.11.10 kernel and Xen 2.0.5 - all domains running debian sarge. If somebody has an idea about that - would be great! Workaround seems to be to start a domain with 256M and decrease it soon to eg. 128M. Increasing the size works than... Regards, Patrick _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Patrick Hess
2005-Jun-28 14:54 UTC
Re: [Xen-users] Can''t increase memory size during runtime
Hi again,
just a couple of minutes after sending my first mail to the list I found
the "xm maxmem" command. Expected this to be the solution - but it is
not... It''s not working like expected - or, like I expected ;)
Starting with 128M memory for domain "dev" which was bootet with 256M
and then decreased to 128M:
nd:~# xm list
Name Id Mem(MB) CPU State Time(s) Console
Domain-0 0 27 0 r---- 46.6
bb1 2 63 0 -b--- 7.1 9602
dev 5 127 0 -b--- 4.5 9605
Ok, let''s increase memory:
nd:~# xm maxmem dev 256
nd:~# xm balloon dev 200
nd:~# xm list
Name Id Mem(MB) CPU State Time(s) Console
Domain-0 0 27 0 r---- 47.6
bb1 2 63 0 -b--- 7.1 9602
dev 5 127 0 -b--- 4.5 9605
Nothing happend :-((
nd:~# xm info
system : Linux
host : nd
release : 2.6.11.10-xen0
version : #2 Fri Jun 24 21:24:58 CEST 2005
machine : i686
cores : 1
hyperthreads_per_core : 1
cpu_mhz : 2392
memory : 503
free_memory : 202
nd:~#
And still around 200M left -- so increasing from 128 to 200 should fine....
Regards,
Patrick
_______________________________________________
Xen-users mailing list
Xen-users@lists.xensource.com
http://lists.xensource.com/xen-users
Xuehai Zhang
2005-Jul-07 05:12 UTC
Re: [Xen-users] Can''t increase memory size during runtime
On Tue, 28 Jun 2005, Patrick Hess wrote:> > Hi again, > > just a couple of minutes after sending my first mail to the list I found > the "xm maxmem" command. Expected this to be the solution - but it is > not... It''s not working like expected - or, like I expected ;) > > Starting with 128M memory for domain "dev" which was bootet with 256M > and then decreased to 128M:Can you explain more about "booted with 256M and then decreased to 128M"? Do you mean you add "mem=268435456" as the kernel command line parameter as well as a line "memory=128" in domain "dev"''s configuration file before you create the "dev" domain? In another word, the "dev" domain''s config file should look like the following according to the instructions suggested in http://lists.xensource.com/archives/html/xen-users/2005-04/msg00294.html: ... name="dev" memory = 128 root = "/dev/sda1 ro" extra = "mem=268435456" ...> nd:~# xm list > Name Id Mem(MB) CPU State Time(s) Console > Domain-0 0 27 0 r---- 46.6 > bb1 2 63 0 -b--- 7.1 9602 > dev 5 127 0 -b--- 4.5 9605 > > Ok, let''s increase memory: > > nd:~# xm maxmem dev 256 > nd:~# xm balloon dev 200 > nd:~# xm list > Name Id Mem(MB) CPU State Time(s) Console > Domain-0 0 27 0 r---- 47.6 > bb1 2 63 0 -b--- 7.1 9602 > dev 5 127 0 -b--- 4.5 9605 > > Nothing happend :-(( > > nd:~# xm info > system : Linux > host : nd > release : 2.6.11.10-xen0 > version : #2 Fri Jun 24 21:24:58 CEST 2005 > machine : i686 > cores : 1 > hyperthreads_per_core : 1 > cpu_mhz : 2392 > memory : 503 > free_memory : 202 > nd:~# > > And still around 200M left -- so increasing from 128 to 200 should fine.... > > Regards, > Patrick > > _______________________________________________ > Xen-users mailing list > Xen-users@lists.xensource.com > http://lists.xensource.com/xen-users >_______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Patrick Hess
2005-Jul-13 09:17 UTC
Re: [Xen-users] Can''t increase memory size during runtime
Xuehai Zhang wrote:>> Starting with 128M memory for domain "dev" which was bootet with 256M >> and then decreased to 128M: > > > Can you explain more about "booted with 256M and then decreased to 128M"? > Do you mean you add "mem=268435456" as the kernel command line parameter > as well as a line "memory=128" in domain "dev"''s configuration file before > you create the "dev" domain? In another word, the "dev" domain''s configHi, I started by setting memory=256 and mem=268435456, after booting I used $ xm balloon dev 128 to decrease. Then I have 256M available at the domU and I can decrease to any value that I like. > name="dev" > memory = 128 > root = "/dev/sda1 ro" > extra = "mem=268435456" Starting domU with this memory settings gives me 128M initial memory but increasing the memory to any value between 128M and 256M show no reaction while "xm list" still shows me 233 M available... :( Regards, Patrick _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users