From: linux@arm.linux.org.uk (Russell King - ARM Linux)
To: linux-arm-kernel@lists.infradead.org
Subject: [RFC 0/4] Intermix Lowmem and vmalloc
Date: Tue, 12 Nov 2013 00:13:15 +0000 [thread overview]
Message-ID: <20131112001315.GD16735@n2100.arm.linux.org.uk> (raw)
In-Reply-To: <1384212412-21236-1-git-send-email-lauraa@codeaurora.org>
On Mon, Nov 11, 2013 at 03:26:48PM -0800, Laura Abbott wrote:
> Hi,
>
> This is an RFC for a feature to allow lowmem and vmalloc virtual address space
> to be intermixed. This has currently only been tested on a narrow set of ARM
> chips.
>
> Currently on 32-bit systems we have
>
>
> Virtual Physical
>
> PAGE_OFFSET +--------------+ PHYS_OFFSET +------------+
> | | | |
> | | | |
> | | | |
> | lowmem | | direct |
> | | | mapped |
> | | | |
> | | | |
> | | | |
> +--------------+------------------>x------------>
> | | | |
> | | | |
> | | | not-direct|
> | | | mapped |
> | vmalloc | | |
> | | | |
> | | | |
> | | | |
> +--------------+ +------------+
>
> Where part of the virtual spaced above PHYS_OFFSET is reserved for direct
> mapped lowmem and part of the virtual address space is reserved for vmalloc.
Minor nit...
ITYM PAGE_OFFSET here. vmalloc space doesn't exist in physical memory.
next prev parent reply other threads:[~2013-11-12 0:13 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-11-11 23:26 [RFC 0/4] Intermix Lowmem and vmalloc Laura Abbott
2013-11-11 23:26 ` [RFC PATCH 1/4] arm: mm: Add iotable_init_novmreserve Laura Abbott
2013-11-11 23:26 ` [RFC PATCH 2/4] arm: mm: Track lowmem in vmalloc Laura Abbott
2013-11-11 23:26 ` [RFC PATCH 3/4] mm/vmalloc.c: Allow lowmem to be tracked " Laura Abbott
2013-11-11 23:37 ` Kyungmin Park
2013-11-12 1:23 ` Laura Abbott
2013-11-14 17:45 ` Dave Hansen
2013-11-15 4:52 ` Laura Abbott
2013-11-15 15:53 ` Dave Hansen
2013-11-26 22:45 ` Andrew Morton
2013-12-03 4:59 ` Laura Abbott
2013-11-11 23:26 ` [RFC PATCH 4/4] mm/vmalloc.c: Treat the entire kernel virtual space as vmalloc Laura Abbott
2013-11-14 17:26 ` Dave Hansen
2013-11-15 5:34 ` Laura Abbott
2013-11-12 0:13 ` Russell King - ARM Linux [this message]
2013-11-12 1:24 ` [RFC 0/4] Intermix Lowmem and vmalloc Laura Abbott
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=20131112001315.GD16735@n2100.arm.linux.org.uk \
--to=linux@arm.linux.org.uk \
--cc=linux-arm-kernel@lists.infradead.org \
/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).