linux-kernel - [PATCH 15/40] autonuma: knuma_migrated per NUMA node queues

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Message-Id: <1340888180-15355-16-git-send-email-aarcange@redhat.com>
Date:	Thu, 28 Jun 2012 14:55:55 +0200
From:	Andrea Arcangeli <aarcange@...hat.com>
To:	linux-kernel@...r.kernel.org, linux-mm@...ck.org
Cc:	Hillf Danton <dhillf@...il.com>, Dan Smith <danms@...ibm.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...e.hu>, Paul Turner <pjt@...gle.com>,
	Suresh Siddha <suresh.b.siddha@...el.com>,
	Mike Galbraith <efault@....de>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Lai Jiangshan <laijs@...fujitsu.com>,
	Bharata B Rao <bharata.rao@...il.com>,
	Lee Schermerhorn <Lee.Schermerhorn@...com>,
	Rik van Riel <riel@...hat.com>,
	Johannes Weiner <hannes@...xchg.org>,
	Srivatsa Vaddagiri <vatsa@...ux.vnet.ibm.com>,
	Christoph Lameter <cl@...ux.com>,
	Alex Shi <alex.shi@...el.com>,
	Mauricio Faria de Oliveira <mauricfo@...ux.vnet.ibm.com>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	Don Morris <don.morris@...com>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>
Subject: [PATCH 15/40] autonuma: knuma_migrated per NUMA node queues

This implements the knuma_migrated queues. The pages are added to
these queues through the NUMA hinting page faults (memory follow CPU
algorithm with false sharing evaluation) and knuma_migrated then is
waken with a certain hysteresis to migrate the memory in round robin
from all remote nodes to its local node.

The head that belongs to the local node that knuma_migrated runs on,
for now must be empty and it's not being used.

Signed-off-by: Andrea Arcangeli <aarcange@...hat.com>
---
 include/linux/mmzone.h |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)

diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index 2427706..d53b26a 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -697,6 +697,12 @@ typedef struct pglist_data {
 	struct task_struct *kswapd;
 	int kswapd_max_order;
 	enum zone_type classzone_idx;
+#ifdef CONFIG_AUTONUMA
+	spinlock_t autonuma_lock;
+	struct list_head autonuma_migrate_head[MAX_NUMNODES];
+	unsigned long autonuma_nr_migrate_pages;
+	wait_queue_head_t autonuma_knuma_migrated_wait;
+#endif
 } pg_data_t;
 
 #define node_present_pages(nid)	(NODE_DATA(nid)->node_present_pages)
--
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