Re: [RFC] Arch option to touch newly allocated pages

Benjamin LaHaise
2002-03-05T04:28:34Z

On Mon, Mar 04, 2002 at 11:15:56PM -0500, Jeff Dike wrote:
> So, does this make things at all clearer? Without the patch I get random
> UML deaths when tmpfs can't back a page. With it, tmpfs is forced to back
> newly allocated pages when they're allocated, and the allocation returns NULL
> if it can't. The result being I get no UML deaths and fairly reasonable
> behavior.

>From your explanation of things, you only need to do the memsets once at
startup of UML where the ram is allocated -> a uml booted with 64MB of
ram would write into every page of the backing store file before even
running the kernel. Doesn't that accomplish the same thing?

-ben