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xen-users
Re: [Xen-users] Serious performance problems - is Xen not ready for prod
<snip>
> When I had a closer look to the mem line:
> Mem: 257488K total, 255368K used, 2120K free, 128K buffers
>
> ...it looked strange to me. I checked and found my config file for this
> domain looking like this:
>
> ...
> memory = 128
> extra = "mem=268435456"
> ...
Well spotted!
> This was left over from my tries to get the "xm balloon" working. I
> removed the extra line from the config file - and voila, it works... Is
> this config above wrong at all or is the strange behaviour I found
> related to the bugs with balloon feature..?
The config line looks OK at first glance but... I wonder what units the mem
parameter expects: if it expects KB then you've just caused it to allocate a
frame table for an absolutely *huge* physical memory, which would account for
all the real memory being allocated.
I can't guess any better without going through the code - it should hopefully
become apparent when someone fixes the ballooning problem (does anyone want
to volunteer for that, btw? It'd be useful if someone could post a patch.).
Cheers,
Mark
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