Messages in this thread | | | Date | Fri, 6 Oct 2017 17:30:25 -0400 (EDT) | From | Nicolas Pitre <> | Subject | Re: [PATCH 0/6] Shrinking DT memory usage |
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On Thu, 5 Oct 2017, Rob Herring wrote:
> On kernels with a minimal config and a RAM target in the 100s of KB, DT > is quite a hog of runtime memory usage. How much is dependent on how many > nodes and properties in the DT which have a corresponding struct device_node > and struct property in the kernel. Just skipping disabled nodes saves a > lot by not creating the device_nodes in the first place[1], but there's > more low hanging fruit by making some of the fields in struct property and > struct device_node optional. With the changes here, the memory usage goes > from 17KB to under 8KB on QEMU's ARM virt machine which is a relatively > small DT.
My test case went from 118072 bytes ddown to 21548 bytes with this series.
Tested-by: Nicolas Pitre <nico@linaro.org>
Nicolas
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