From: Jack Steiner <steiner@sgi.com>
To: linux-mm@kvack.org, mingo@elte.hu
Cc: linux-ia64@vger.kernel.org
Subject: Very large memory configurations: > 16 TB
Date: Thu, 6 Jan 2011 11:09:42 -0600 [thread overview]
Message-ID: <20110106170942.GA8253@sgi.com> (raw)
SGI is currently developing an x86_64 system with more than 16TB of memory per
SSI. As far as I can tell, this should be supported. The relevant definitions
such as MAX_PHYSMEM_BITS appear ok.
One area of concern is page counts. Exceeding 16TB will also exceed MAX_INT
page frames. The kernel (at least in all places I've found) keep pagecounts
in longs.
Have I missed anything? Should this > 16TB work? Are there any kernel problems or
problems with user tools that anyone knows of.
Any help or pointers to potential problem areas would be appreciated...
---
Jack Steiner (steiner@sgi.com)
SGI - Silicon Graphics, Inc.
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Fight unfair telecom policy in Canada: sign http://dissolvethecrtc.ca/
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
next reply other threads:[~2011-01-06 17:11 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-06 17:09 Jack Steiner [this message]
2011-01-07 12:16 ` Very large memory configurations: > 16 TB Michel Lespinasse
2011-01-07 12:51 ` Ingo Molnar
2011-01-07 16:31 ` Christoph Lameter
2011-01-07 16:56 ` Ingo Molnar
2011-01-07 17:14 ` Christoph Lameter
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=20110106170942.GA8253@sgi.com \
--to=steiner@sgi.com \
--cc=linux-ia64@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=mingo@elte.hu \
/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;
as well as URLs for NNTP newsgroup(s).