Messages in this thread | | | Date | Tue, 3 May 2011 17:00:47 -0700 (PDT) | From | David Rientjes <> | Subject | Re: [patch v3] x86: allow ZONE_DMA to be configurable |
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On Wed, 27 Apr 2011, David Rientjes wrote:
> ZONE_DMA is unnecessary for a large number of machines that do not > require addressing in the lower 16MB of memory because they do not use > devices with 16-bit address registers (plus one page byte register). > > This patch allows users to disable ZONE_DMA for x86 if they know they > will not be using such devices with their kernel. > > This prevents the VM from unnecessarily reserving a ratio of memory > (defaulting to 1/256th of system capacity) with lowmem_reserve_ratio > for such allocations when it will never be used. > > Signed-off-by: David Rientjes <rientjes@google.com>
Peter, is this ready for merge?
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