lkml.org 
[lkml]   [2003]   [Mar]   [3]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [patch] remap-file-pages-2.5.63-A0

On Mon, 3 Mar 2003, Ingo Molnar wrote:
>
> the attached patch, against BK-curr, is a preparation to make
> remap_file_pages() usable on swappable vmas as well. When 'swapping out'
> shared-named mappings the page offset is written into the pte.
>
> it takes one bit from the swap-type bits, otherwise it does not change the
> pte layout - so it should be easy to adapt any other architecture to this
> change as well. (this patch does not introduce the protection-bits-in-pte
> approach used in my previous patch.)

One question: Why?

What's wrong with just using the value we use now (0), and just
calculating the page from the vma/offset information? Why hide the offset
in the page tables, when there is no need for it?

Linus

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 13:33    [W:0.038 / U:1.116 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site