Re: [patch 3/9] Guest page hinting: volatile page cache.

Dave Hansen
2006-09-01T14:58:08Z

On Fri, 2006-09-01 at 13:09 +0200, Martin Schwidefsky wrote:
> +#define PG_state_change 21 /* HV page state is changing. */
> +#define PG_discarded 22 /* HV page has been discarded. */

We're already desperately short on page flags on 32-bit architectures.
It seems a wee bit silly to add two arch-generic flags for what is a
very specialized arch-specific feature at this point.

I know that there are 32-bit s390 kernels, but would this be a
reasonable feature to restrict to only 64-bit kernels? That might be a
decent compromise.

-- Dave