From: Albert Cahalan <albert@users.sf.net>
To: linux-kernel mailing list <linux-kernel@vger.kernel.org>
Cc: riel@redhat.com
Subject: pte_addr_t size reduction for 64 GB case?
Date: 19 May 2004 00:42:11 -0400 [thread overview]
Message-ID: <1084941731.955.836.camel@cube> (raw)
When handling 64 GB on i386, pte_addr_t really only
needs 33 bits to find the PTE. It sure doesn't need
the full 64 bits it is using.
How about cheating a bit? If the pte_addr_t only had
the high 32 bits of the 36-bit pointer, it would point
to a pair of the 8-byte PTEs in a 16-byte chunk of RAM.
Then simply examine the PTEs to see which one is the
correct one.
next reply other threads:[~2004-05-19 7:04 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-05-19 4:42 Albert Cahalan [this message]
2004-05-19 7:44 ` pte_addr_t size reduction for 64 GB case? Andrew Morton
2004-05-19 8:08 ` William Lee Irwin III
2004-05-19 11:18 ` Rik van Riel
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1084941731.955.836.camel@cube \
--to=albert@users.sf.net \
--cc=linux-kernel@vger.kernel.org \
--cc=riel@redhat.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox