Messages in this thread | | | Subject | Re: [PATCH] Reserve low memory | From | Andi Kleen <> | Date | Mon, 22 Oct 2007 15:53:39 +0200 |
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Or Sagi <ors@tutis.com> writes:
> Adds a CONFIG_RESERVE_LOWMEM option which reserves all memory below > CONFIG_PHYSICAL_START address. > > Cleans up some of the static early-boot memory allocations (nodemap, trampoline) > Useful in particular for running virtual machines which require a 1:1 mapping > of the physical memory. This lets a virtual machine control a dma-capable device > directly without hypervisor involvement.
With the infrastructure in ftp://firstfloor.org/pub/ak/x86_64/quilt/patches/early-reserve you can do this much cleaner (and likely safer)
And using CONFIG_* options for such things is wrong anyways. If anything it should be run time options.
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