Re: [Xen-devel] [PATCH] Prevent changing a memory size of Domain-0 even if users make a careless mistake

[Keir Fraser <keir.fraser@xxxxxxxxxxxxx>]

I think it's fair to just say "Don't do that then, you idiot!". :-)

 -- Keir

On 4/4/08 11:06, "Masaki Kanno" <kanno.masaki@xxxxxxxxxxxxxx> wrote:

> Hi,
> 
> If users accidentally change a memory size of Domain-0 to very small
> memory size by xm mem-set command, users will be not able to operate
> Domain-0.  I think that Domain-0 is important for Xen, so I'd like to
> prevent the accident by xm mem-set command.
> 
> This patch prevents changing the memory size of Domain-0 by xm mem-set
> command if specified memory size is smaller than dom0-min-mem in
> xend-config.sxp. 
> 
>  # cat /etc/xen/xend-config.sxp | grep "(dom0-min-mem"
>  (dom0-min-mem 384)
>  # xm list Domain-0
>  Name                                        ID   Mem VCPUs      State
> Time(s)
>  Domain-0                                     0   941     2     r-----
> 62.6
>  # xm mem-set Domain-0 1
>  Error: memory_dynamic_max cannot be changed for safety reasons
>  Usage: xm mem-set <Domain> <Mem>
>  
>  Set the current memory usage for a domain.
>  # xm list Domain-0
>  Name                                        ID   Mem VCPUs      State
> Time(s)
>  Domain-0                                     0   941     2     r-----
> 63.6
> 
> 
> Signed-off-by: Masaki Kanno <kanno.masaki@xxxxxxxxxxxxxx>
> 
> Best regards,
>  Kan
> 
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> Xen-devel@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-devel



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