From: Bob Picco <bpicco@xxxxxxxxxx>
Date: Tue, 16 Sep 2014 09:29:54 -0400
> From: bob picco <bpicco@xxxxxxxxxx>
>
> The "mem" boot option can result in many unexpected consequences. This patch
> attempts to prevent boot hangs which have been experienced on T4-4 and T5-8.
> Basically the boot loader allocates vmlinuz and initrd higher in available
> OBP physical memory. For example, on a 2Tb T5-8 it isn't possible to boot
> with mem=20G.
>
> The patch utilizes memblock to avoid reserved regions and trim memory which
> is only free. Other improvements are possible for a multi-node machine.
...
> The patch was tested on T4-1, T5-8 and Jalap?no.
>
> Cc: sparclinux@xxxxxxxxxxxxxxx
> Signed-off-by: Bob Picco <bob.picco@xxxxxxxxxx>
> ---
> V2: correct programming style syntax.
I applied this with one small stylistic change:
> + for_each_free_mem_range(i, any_nid, &pa_start, &pa_end, &nid)
for_each_free_mem_range(i, NUMA_NO_NODE, &pa_start, &pa_end, NULL)
> + for_each_free_mem_range(i, any_nid, &pa_start, &pa_end, &nid) {
for_each_free_mem_range(i, NUMA_NO_NODE, &pa_start, &pa_end, NULL) {
And I killed the now-unused local variables.
Thanks Bob.
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