From: Christoph Lameter <clameter@sgi.com>
To: akpm@osdl.org
Cc: Paul Menage <menage@google.com>,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
Nick Piggin <nickpiggin@yahoo.com.au>,
linux-mm@kvack.org, Christoph Lameter <clameter@sgi.com>,
Paul Jackson <pj@sgi.com>, Dave Chinner <dgc@sgi.com>,
Andi Kleen <ak@suse.de>
Subject: [PATCH 5/5] Throttle vm writeout per cpuset
Date: Fri, 19 Jan 2007 19:10:33 -0800 (PST) [thread overview]
Message-ID: <20070120031033.17491.53781.sendpatchset@schroedinger.engr.sgi.com> (raw)
In-Reply-To: <20070120031007.17491.33355.sendpatchset@schroedinger.engr.sgi.com>
Throttle VM writeout in a cpuset aware way
This bases the vm throttling from the reclaim path on the dirty ratio
of the cpuset. Note that a cpuset is only effective if shrink_zone is called
from direct reclaim.
kswapd has a cpuset context that includes the whole machine. VM throttling
will only work during synchrononous reclaim and not from kswapd.
Signed-off-by: Christoph Lameter <clameter@sgi.com>
Index: linux-2.6.20-rc5/include/linux/writeback.h
===================================================================
--- linux-2.6.20-rc5.orig/include/linux/writeback.h 2007-01-15 21:37:05.209897874 -0600
+++ linux-2.6.20-rc5/include/linux/writeback.h 2007-01-15 21:37:33.283671963 -0600
@@ -85,7 +85,7 @@ static inline void wait_on_inode(struct
int wakeup_pdflush(long nr_pages, nodemask_t *nodes);
void laptop_io_completion(void);
void laptop_sync_completion(void);
-void throttle_vm_writeout(void);
+void throttle_vm_writeout(nodemask_t *);
/* These are exported to sysctl. */
extern int dirty_background_ratio;
Index: linux-2.6.20-rc5/mm/page-writeback.c
===================================================================
--- linux-2.6.20-rc5.orig/mm/page-writeback.c 2007-01-15 21:35:28.013794159 -0600
+++ linux-2.6.20-rc5/mm/page-writeback.c 2007-01-15 21:37:33.302228293 -0600
@@ -349,12 +349,12 @@ void balance_dirty_pages_ratelimited_nr(
}
EXPORT_SYMBOL(balance_dirty_pages_ratelimited_nr);
-void throttle_vm_writeout(void)
+void throttle_vm_writeout(nodemask_t *nodes)
{
struct dirty_limits dl;
for ( ; ; ) {
- get_dirty_limits(&dl, NULL, &node_online_map);
+ get_dirty_limits(&dl, NULL, nodes);
/*
* Boost the allowable dirty threshold a bit for page
Index: linux-2.6.20-rc5/mm/vmscan.c
===================================================================
--- linux-2.6.20-rc5.orig/mm/vmscan.c 2007-01-15 21:37:26.605346439 -0600
+++ linux-2.6.20-rc5/mm/vmscan.c 2007-01-15 21:37:33.316878027 -0600
@@ -949,7 +949,7 @@ static unsigned long shrink_zone(int pri
}
}
- throttle_vm_writeout();
+ throttle_vm_writeout(&cpuset_current_mems_allowed);
atomic_dec(&zone->reclaim_in_progress);
return nr_reclaimed;
--
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next prev parent reply other threads:[~2007-01-20 3:10 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-01-20 3:10 [PATCH 0/5] Cpuset aware writeback V1 Christoph Lameter
2007-01-20 3:10 ` [PATCH 1/5] Add a map to to track dirty pages per node Christoph Lameter
2007-01-20 5:15 ` Paul Jackson
2007-01-22 17:41 ` Christoph Lameter
2007-01-22 1:31 ` David Chinner
2007-01-22 19:30 ` Christoph Lameter
2007-01-28 21:38 ` David Chinner
2007-01-29 16:50 ` Christoph Lameter
2007-01-20 3:10 ` [PATCH 2/5] Add a nodemask to pdflush functions Christoph Lameter
2007-01-20 3:10 ` [PATCH 3/5] Per cpuset dirty ratio calculation Christoph Lameter
2007-01-20 3:10 ` [PATCH 4/5] Cpuset aware writeback during reclaim Christoph Lameter
2007-01-20 3:10 ` Christoph Lameter [this message]
-- strict thread matches above, loose matches on Subject: below --
2007-01-23 18:52 [PATCH 0/5] Cpuset aware writeback V2 Christoph Lameter
2007-01-23 18:53 ` [PATCH 5/5] Throttle vm writeout per cpuset Christoph Lameter
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