[libvirt] [PATCH] Qemu: ask for memory preallocation with large pages

[Daniel P. Berrange]

On Thu, Jan 07, 2010 at 02:53:20PM +0100, Daniel Veillard wrote:
> The -mem-prealloc flag should be used when using large pages
> This ensures qemu tries to allocate all required memory immediately,
> rather than when first used. The latter mode will crash qemu
> if hugepages aren't available when accessed, while the former
> should gracefully fallback to non-hugepages.
> 
> * src/qemu/qemu_conf.c: add -mem-prealloc flag to qemu command line
>   when using large pages

ACK, definitely don't want VMs crashing when attempting to page in
huge pages which don't exist anymore

Daniel
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