From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
To: linux-mm@kvack.org
Cc: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
npiggin@suse.de,
"hugh.dickins@tiscali.co.uk" <hugh.dickins@tiscali.co.uk>,
avi@redhat.com,
"akpm@linux-foundation.org" <akpm@linux-foundation.org>,
torvalds@linux-foundation.org, aarcange@redhat.com
Subject: [PATCH 0/2] ZERO PAGE again v3.
Date: Thu, 9 Jul 2009 12:24:28 +0900 [thread overview]
Message-ID: <20090709122428.8c2d4232.kamezawa.hiroyu@jp.fujitsu.com> (raw)
After v2 discussion, I felt that "Go" sign can be given if implemetaion is neat
and tiny and overhead seems very small. Here is v3.
In this version,
- use pte_special() in vm_normal_page()
All ZERO_PAGE check will go down to vm_normal_page() and check is done here.
Some new flags in follow_page() and get_user_pages().
- per arch use-zero-page config is added.
IIUC, archs which have _PAGE_SPECIAL is only x86, powerpc, s390.
Because this patch make use of pte_special() check, config to use zero page
is added and you can turn it off if necessary.
I this patch, only x86 is turned on which I can test.
Any comments are welcome.
Thanks,
-Kame
--
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/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
next reply other threads:[~2009-07-09 3:13 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-07-09 3:24 KAMEZAWA Hiroyuki [this message]
2009-07-09 3:27 ` [PATCH 1/2] ZERO PAGE config KAMEZAWA Hiroyuki
2009-07-09 3:28 ` [PATCH 2/2] ZERO PAGE by pte_special KAMEZAWA Hiroyuki
2009-07-09 3:58 ` Linus Torvalds
2009-07-09 4:54 ` KAMEZAWA Hiroyuki
2009-07-13 5:45 ` [PATCH 0/2] ZERO PAGE again v3 KAMEZAWA Hiroyuki
2009-07-16 9:01 ` [PATCH 0/2] ZERO PAGE again v4 KAMEZAWA Hiroyuki
2009-07-16 9:03 ` [PATCH 1/2] " KAMEZAWA Hiroyuki
2009-07-16 9:04 ` [PATCH 2/2] ZERO PAGE based on pte_special KAMEZAWA Hiroyuki
2009-07-16 12:00 ` Minchan Kim
2009-07-16 13:02 ` KAMEZAWA Hiroyuki
2009-07-17 0:38 ` KAMEZAWA Hiroyuki
2009-07-22 23:51 ` [PATCH 0/2] ZERO PAGE again v4 KAMEZAWA Hiroyuki
2009-07-23 0:12 ` Andrew Morton
2009-07-23 0:33 ` KAMEZAWA Hiroyuki
2009-07-23 0:47 ` Andrew Morton
2009-07-26 16:00 ` Hugh Dickins
2009-07-26 22:56 ` KAMEZAWA Hiroyuki
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=20090709122428.8c2d4232.kamezawa.hiroyu@jp.fujitsu.com \
--to=kamezawa.hiroyu@jp.fujitsu.com \
--cc=aarcange@redhat.com \
--cc=akpm@linux-foundation.org \
--cc=avi@redhat.com \
--cc=hugh.dickins@tiscali.co.uk \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=npiggin@suse.de \
--cc=torvalds@linux-foundation.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