[lkml]   [2008]   [Jul]   [4]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: How to alloc highmem page below 4GB on i386?
On Mon, 30 Jun 2008 20:03:23 +0200
Pierre Ossman <> wrote:

> Simple question. How do I allocate a page from highmem, that's still
> within 32 bits? x86_64 has the DMA32 zone, but i386 has just HIGHMEM.
> As most devices can't DMA above 32 bit, I have 3 GB of memory that's
> not getting decent usage (or results in needless bouncing). What to do?
> I tried just enabling CONFIG_DMA32 for i386, but there is some guard
> against too many memory zones. I'm assuming this is there for a good
> reason?


-- Pierre Ossman

Linux kernel, MMC maintainer
rdesktop, core developer

WARNING: This correspondence is being monitored by the
Swedish government. Make sure your server uses encryption
for SMTP traffic and consider using PGP for end-to-end
[unhandled content-type:application/pgp-signature]
 \ /
  Last update: 2008-07-04 20:01    [W:0.055 / U:0.088 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site