From: Mel Gorman <mel@csn.ul.ie>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Andrea Arcangeli <aarcange@redhat.com>,
Christoph Lameter <cl@linux-foundation.org>,
Adam Litke <agl@us.ibm.com>, Avi Kivity <avi@redhat.com>,
David Rientjes <rientjes@google.com>,
Minchan Kim <minchan.kim@gmail.com>,
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
Rik van Riel <riel@redhat.com>, Mel Gorman <mel@csn.ul.ie>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: [PATCH 04/14] Allow CONFIG_MIGRATION to be set without CONFIG_NUMA or memory hot-remove
Date: Tue, 30 Mar 2010 10:14:39 +0100 [thread overview]
Message-ID: <1269940489-5776-5-git-send-email-mel@csn.ul.ie> (raw)
In-Reply-To: <1269940489-5776-1-git-send-email-mel@csn.ul.ie>
CONFIG_MIGRATION currently depends on CONFIG_NUMA or on the architecture
being able to hot-remove memory. The main users of page migration such as
sys_move_pages(), sys_migrate_pages() and cpuset process migration are
only beneficial on NUMA so it makes sense.
As memory compaction will operate within a zone and is useful on both NUMA
and non-NUMA systems, this patch allows CONFIG_MIGRATION to be set if the
user selects CONFIG_COMPACTION as an option.
Signed-off-by: Mel Gorman <mel@csn.ul.ie>
Reviewed-by: Christoph Lameter <cl@linux-foundation.org>
Reviewed-by: Rik van Riel <riel@redhat.com>
Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
---
mm/Kconfig | 18 +++++++++++++++---
1 files changed, 15 insertions(+), 3 deletions(-)
diff --git a/mm/Kconfig b/mm/Kconfig
index 9c61158..4fd75a0 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -172,6 +172,16 @@ config SPLIT_PTLOCK_CPUS
default "4"
#
+# support for memory compaction
+config COMPACTION
+ bool "Allow for memory compaction"
+ def_bool y
+ select MIGRATION
+ depends on EXPERIMENTAL && HUGETLBFS && MMU
+ help
+ Allows the compaction of memory for the allocation of huge pages.
+
+#
# support for page migration
#
config MIGRATION
@@ -180,9 +190,11 @@ config MIGRATION
depends on NUMA || ARCH_ENABLE_MEMORY_HOTREMOVE
help
Allows the migration of the physical location of pages of processes
- while the virtual addresses are not changed. This is useful for
- example on NUMA systems to put pages nearer to the processors accessing
- the page.
+ while the virtual addresses are not changed. This is useful in
+ two situations. The first is on NUMA systems to put pages nearer
+ to the processors accessing. The second is when allocating huge
+ pages as migration can relocate pages to satisfy a huge page
+ allocation instead of reclaiming.
config PHYS_ADDR_T_64BIT
def_bool 64BIT || ARCH_PHYS_ADDR_T_64BIT
--
1.6.5
--
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 prev parent reply other threads:[~2010-03-30 9:14 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-03-30 9:14 [PATCH 0/14] Memory Compaction v6 Mel Gorman
2010-03-30 9:14 ` [PATCH 01/14] mm,migration: Take a reference to the anon_vma before migrating Mel Gorman
2010-03-30 9:14 ` [PATCH 02/14] mm,migration: Do not try to migrate unmapped anonymous pages Mel Gorman
2010-03-30 9:14 ` [PATCH 03/14] mm: Share the anon_vma ref counts between KSM and page migration Mel Gorman
2010-03-30 9:14 ` Mel Gorman [this message]
2010-03-30 9:14 ` [PATCH 05/14] Export unusable free space index via /proc/unusable_index Mel Gorman
2010-03-30 9:14 ` [PATCH 06/14] Export fragmentation index via /proc/extfrag_index Mel Gorman
2010-03-30 9:14 ` [PATCH 07/14] Move definition for LRU isolation modes to a header Mel Gorman
2010-03-30 9:14 ` [PATCH 08/14] Memory compaction core Mel Gorman
2010-03-30 9:14 ` [PATCH 09/14] Add /proc trigger for memory compaction Mel Gorman
2010-03-30 9:14 ` [PATCH 10/14] Add /sys trigger for per-node " Mel Gorman
2010-03-30 9:14 ` [PATCH 11/14] Direct compact when a high-order allocation fails Mel Gorman
2010-03-30 9:14 ` [PATCH 12/14] Add a tunable that decides when memory should be compacted and when it should be reclaimed Mel Gorman
2010-03-30 9:14 ` [PATCH 13/14] Do not compact within a preferred zone after a compaction failure Mel Gorman
2010-03-30 9:14 ` [PATCH 14/14] mm,migration: Allow the migration of PageSwapCache pages Mel Gorman
2010-03-31 5:26 ` KAMEZAWA Hiroyuki
2010-03-31 11:27 ` Mel Gorman
2010-03-31 23:57 ` KAMEZAWA Hiroyuki
2010-04-01 2:39 ` Minchan Kim
2010-04-01 2:43 ` Minchan Kim
2010-04-01 3:01 ` KAMEZAWA Hiroyuki
2010-04-01 4:44 ` Minchan Kim
2010-04-01 5:42 ` KAMEZAWA Hiroyuki
2010-04-01 10:51 ` Minchan Kim
2010-04-01 17:36 ` Mel Gorman
2010-04-02 0:20 ` Minchan Kim
2010-04-02 8:51 ` Mel Gorman
2010-04-02 0:21 ` KAMEZAWA Hiroyuki
2010-04-02 8:52 ` Mel Gorman
2010-04-01 9:30 ` Mel Gorman
2010-04-01 10:42 ` Minchan Kim
-- strict thread matches above, loose matches on Subject: below --
2010-04-02 16:02 [PATCH 0/14] Memory Compaction v7 Mel Gorman
2010-04-02 16:02 ` [PATCH 04/14] Allow CONFIG_MIGRATION to be set without CONFIG_NUMA or memory hot-remove Mel Gorman
2010-04-07 0:05 ` Andrew Morton
2010-04-07 10:22 ` Mel Gorman
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=1269940489-5776-5-git-send-email-mel@csn.ul.ie \
--to=mel@csn.ul.ie \
--cc=aarcange@redhat.com \
--cc=agl@us.ibm.com \
--cc=akpm@linux-foundation.org \
--cc=avi@redhat.com \
--cc=cl@linux-foundation.org \
--cc=kamezawa.hiroyu@jp.fujitsu.com \
--cc=kosaki.motohiro@jp.fujitsu.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=minchan.kim@gmail.com \
--cc=riel@redhat.com \
--cc=rientjes@google.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;
as well as URLs for NNTP newsgroup(s).