Re: please revert bogus patch to vmscan.c

Benjamin Herrenschmidt
2001-10-30T17:36:53Z

>Since we can't (AFAIK) have linux use larger PTEs (in which case we
>could store a pointer to the hash PTE in the linux PTE), We could
>instead layout an array of pointer (one for each page) that would
>hold these.
>
>That way, we have a fast way to grab the real accessed and dirty
>bits, which means we no longer need to flush hash pages when getting
>those bits and have a more realistic PAGE_ACCESSED (currently, any page
>in the hash has PAGE_ACCESSED).

Obviously, an array of pointer would be horrible bloat, maybe the
layout of a parallel page table (ARM does this I think) would make
more sense.

I don't know if it would be really an improvement however.

ben.