page: Add default hugepage support on Linux

[joshlf]

Currently, priv_default_hugepage on Linux always returns None.

Implementing it consists of parsing /proc/meminfo looking for a line of the form Hugepagesize: xxx kB. What makes this tricky is that it has to be done using only libc, and without heap allocation.

Mentor: @joshlf

[joshlf]

@gmjosack Do you mind if I submit this issue to This Week in Rust's call for participation section?

[gmjosack]

nope. Go ahead!

…

On Thu, Aug 31, 2017 at 11:49 AM, Joshua Liebow-Feeser < ***@***.***> wrote: @gmjosack <https://github.com/gmjosack> Do you mind if I submit this issue to This Week in Rust's call for participation section? — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#7 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AAOGzjtT2ZNTwJHFB1s8yx3ihpV-DMS-ks5sdwBUgaJpZM4PIT6h> .

[joshlf]

@gmjosack Awesome! Would you be OK giving me write access to this repo so that I can manipulate issue labels? Call for Participation issues are supposed to have experience level labels (easy/medium/hard).