Re: [Xen-devel] Regarding changing memory for DOM0

[Julien Grall <julien.grall@xxxxxxx>]

On 03/08/17 09:57, George John wrote:
> Hi,
Hello,

>  I am running Xen on Rcar H3 which is now configured Dom0 memory as 752M
> and need to change it as 2048M.I attempted to change it by
>  xl mem-set (xl mem-set 0 2048M) where 0 is Dom0 ID.It result following
> error
>
>
> root@salvator-x-xen-dom0:~# xl list
>
> Name                                        ID   Mem VCPUs    State
> Time(s)
> Domain-0                                     0   752     4
> r-----      11.4
> root@salvator-x-xen-dom0:~#
>
>  my try as folows
>  ---------------------
>
> root@salvator-x-xen-dom0:~# xl mem-set 0 2048m
> xl: libxl.c:345: libxl_defbool_val: Assertion
> `!libxl_defbool_is_default(db)' failed.
This was already reported few days ago. Please see:

https://lists.xenproject.org/archives/html/xen-devel/2017-07/msg01461.html

However...

> after modification
> ----------------------
>
>     chosen {
>         bootargs = "dom0_mem=2048M console=dtuart dtuart=serial0
> dom0_max_vcpus=4 bootscrub=0 flask_enforcing=1 loglvl=all";
>
>         xen,dom0-bootargs = "console=hvc0 root=/dev/nfs
> nfsroot=192.168.1.100:/exports/rfs_xen/ ip=192.168.1.1:192.168.1.100 rw
> rootwait  ignore_loglevel cma=128M";
>         .
>         .
>         .
>         .
>         .
>     }
>
> but unfortunately file system crashes while booting
... I am not sure to understand the relation between the file system 
crashing and the amount of RAM. Having the full log here would be 
helpful. Is it because all the memory allocated is above 4GB?
> xen version is 4.8.0
Do you have any requirement to use 4.8? If so, you should at least use 
the latest 4.8 version (i.e 4.8.1). If not, I would recommend to move to 
xen 4.9 if not unstable.
Also, what is your Linux version?

Cheers,

--
Julien Grall

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