On Tue, May 21, 2002 at 10:51:19AM -0700, Andrew Morton wrote:
> The buffermem_pages accounting is vaguely interesting because
> it tells us how much of ZONE_NORMAL is being usefully used for
> blockdev pagecache. And ZONE_NORMAL utilisation is a bit of a
> hot topic at present.
Yho sais all blockdev mapping have to stay ZONE_NORMAL? If filesystems
access them without buffer_heads there is no reason to not put the
pages in high memory. I also remember vaguely that you intend to move
buffer_heads to high memory in the longer term..
> But the same information can be obtained on-demand by running
> around the bdev superblock's inodes adding up nr_pages. That
> approach is better than the per-page atomic ops in buffer.c.
*nod*
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