svn commit: r260898 - head/sys/kern

[Adrian Chadd]

On 22 January 2014 20:34, Rui Paulo <rpaulo at freebsd.org> wrote:
> On 22 Jan 2014, at 20:05, Adrian Chadd <adrian.chadd at gmail.com> wrote:
>
>> .. Make it be an offset into the table rather than a pointer, then we can do dirty rcu style hacks to just replace and grow the table as we need more memory.
>>
>> Don't we have a standard way to pull memory from the top of the physmem area early on for allocations like this?
>
> Perhaps a bit overkill for this problem?

We already have platform dependent ways of doing this in the VM init
path for exactly this - structures needed early at boot.

It may be overkill but it may also be the cleanest way to allow
boot-time tuned things based on early available information, which we
may want to do when it's time to boot a single kernel on a 2-core atom
board or a 256 core intel/amd server board.


-a