lkml.org 
[lkml]   [1999]   [Aug]   [17]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [bigmem-patch] 4GB with Linux on IA32


On Tue, 17 Aug 1999, Andrea Arcangeli wrote:
>
> This other incremental patch will make the bigmem code safe w.r.t. raw-io:

Well, it makes it safe, but doesn't actually make it _work_. As such, it's
not very usable. I suspect it had better be our current fix, though.

I also suspect that we can't just break all drivers, so for now I would
just make this work for anonymous pages and ignore direct-IO. The driver
issue is going to need some serious thinking, and doing it for anonymous
pages only may be enough for many things. Especially if anonymous pages
_prefer_ the high-memory pages.

Oh, and copied-on-write pages count as anonymous, I assume you did that
already (ie when you allocate a new page and copy the old contents into
it, you might as well consider the new page to be anonymous, even though
it gets its initial data from a potentially non-anonymous page).

Linus


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

\
 
 \ /
  Last update: 2005-03-22 13:53    [W:0.086 / U:0.128 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site