From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Greg KH <gregkh@linuxfoundation.org>,
torvalds@linux-foundation.org, akpm@linux-foundation.org,
alan@lxorguk.ukuu.org.uk, Dimitri Sivanich <sivanich@sgi.com>,
Christoph Lameter <cl@gentwo.org>, Mel Gorman <mel@csn.ul.ie>,
Mel Gorman <mgorman@suse.de>
Subject: [ 07/40] mm/vmstat.c: cache align vm_stat
Date: Thu, 26 Jul 2012 14:29:25 -0700 [thread overview]
Message-ID: <20120726211411.751682159@linuxfoundation.org> (raw)
In-Reply-To: <20120726211411.164006056@linuxfoundation.org>
From: Greg KH <gregkh@linuxfoundation.org>
3.0-stable review patch. If anyone has any objections, please let me know.
------------------
From: Dimitri Sivanich <sivanich@sgi.com>
commit a1cb2c60ddc98ff4e5246f410558805401ceee67 upstream.
Stable note: Not tracked on Bugzilla. This patch is known to make a big
difference to tmpfs performance on larger machines.
This was found to adversely affect tmpfs I/O performance.
Tests run on a 640 cpu UV system.
With 120 threads doing parallel writes, each to different tmpfs mounts:
No patch: ~300 MB/sec
With vm_stat alignment: ~430 MB/sec
Signed-off-by: Dimitri Sivanich <sivanich@sgi.com>
Acked-by: Christoph Lameter <cl@gentwo.org>
Acked-by: Mel Gorman <mel@csn.ul.ie>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Mel Gorman <mgorman@suse.de>
---
mm/vmstat.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -78,7 +78,7 @@ void vm_events_fold_cpu(int cpu)
*
* vm_stat contains the global counters
*/
-atomic_long_t vm_stat[NR_VM_ZONE_STAT_ITEMS];
+atomic_long_t vm_stat[NR_VM_ZONE_STAT_ITEMS] __cacheline_aligned_in_smp;
EXPORT_SYMBOL(vm_stat);
#ifdef CONFIG_SMP
next prev parent reply other threads:[~2012-07-26 21:40 UTC|newest]
Thread overview: 54+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-07-26 21:14 [ 00/40] 3.0.39-stable review Greg KH
2012-07-26 21:29 ` [ 01/40] cifs: always update the inode cache with the results from a FIND_* Greg Kroah-Hartman
2012-07-26 21:29 ` [ 02/40] ntp: Fix STA_INS/DEL clearing bug Greg Kroah-Hartman
2012-07-26 21:29 ` [ 03/40] mm: fix lost kswapd wakeup in kswapd_stop() Greg Kroah-Hartman
2012-07-26 21:29 ` [ 04/40] MIPS: Properly align the .data..init_task section Greg Kroah-Hartman
2012-07-26 21:29 ` [ 05/40] UBIFS: fix a bug in empty space fix-up Greg Kroah-Hartman
2012-07-26 21:29 ` [ 06/40] dm raid1: fix crash with mirror recovery and discard Greg Kroah-Hartman
2012-07-26 21:29 ` Greg Kroah-Hartman [this message]
2012-07-26 21:29 ` [ 08/40] mm: memory hotplug: Check if pages are correctly reserved on a per-section basis Greg Kroah-Hartman
2012-07-26 21:29 ` [ 09/40] mm: reduce the amount of work done when updating min_free_kbytes Greg Kroah-Hartman
2012-07-26 21:29 ` [ 10/40] mm: vmscan: fix force-scanning small targets without swap Greg Kroah-Hartman
2012-07-26 21:29 ` [ 11/40] vmscan: clear ZONE_CONGESTED for zone with good watermark Greg Kroah-Hartman
2012-07-26 21:29 ` [ 12/40] vmscan: add shrink_slab tracepoints Greg Kroah-Hartman
2012-07-26 21:29 ` [ 13/40] vmscan: shrinker->nr updates race and go wrong Greg Kroah-Hartman
2012-07-29 20:29 ` Ben Hutchings
2012-07-30 9:06 ` Mel Gorman
2012-07-30 15:41 ` Greg Kroah-Hartman
2012-07-26 21:29 ` [ 14/40] vmscan: reduce wind up shrinker->nr when shrinker cant do work Greg Kroah-Hartman
2012-07-26 21:29 ` [ 15/40] vmscan: limit direct reclaim for higher order allocations Greg Kroah-Hartman
2012-07-26 21:29 ` [ 16/40] vmscan: abort reclaim/compaction if compaction can proceed Greg Kroah-Hartman
2012-07-26 21:29 ` [ 17/40] mm: compaction: trivial clean up in acct_isolated() Greg Kroah-Hartman
2012-07-26 21:29 ` [ 18/40] mm: change isolate mode from #define to bitwise type Greg Kroah-Hartman
2012-07-26 21:29 ` [ 19/40] mm: compaction: make isolate_lru_page() filter-aware Greg Kroah-Hartman
2012-07-26 21:29 ` [ 20/40] mm: zone_reclaim: " Greg Kroah-Hartman
2012-07-26 21:29 ` [ 21/40] mm: migration: clean up unmap_and_move() Greg Kroah-Hartman
2012-07-26 21:29 ` [ 22/40] mm: compaction: allow compaction to isolate dirty pages Greg Kroah-Hartman
2012-07-26 21:29 ` [ 23/40] mm: compaction: determine if dirty pages can be migrated without blocking within ->migratepage Greg Kroah-Hartman
2012-07-26 21:29 ` [ 24/40] mm: page allocator: do not call direct reclaim for THP allocations while compaction is deferred Greg Kroah-Hartman
2012-07-26 21:29 ` [ 25/40] mm: compaction: make isolate_lru_page() filter-aware again Greg Kroah-Hartman
2012-07-26 21:29 ` [ 26/40] kswapd: avoid unnecessary rebalance after an unsuccessful balancing Greg Kroah-Hartman
2012-07-26 21:29 ` [ 27/40] kswapd: assign new_order and new_classzone_idx after wakeup in sleeping Greg Kroah-Hartman
2012-07-26 21:29 ` [ 28/40] mm: compaction: introduce sync-light migration for use by compaction Greg Kroah-Hartman
2012-07-26 21:29 ` [ 29/40] mm: vmscan: when reclaiming for compaction, ensure there are sufficient free pages available Greg Kroah-Hartman
2012-07-26 21:29 ` [ 30/40] mm: vmscan: do not OOM if aborting reclaim to start compaction Greg Kroah-Hartman
2012-07-26 21:29 ` [ 31/40] mm: vmscan: check if reclaim should really abort even if compaction_ready() is true for one zone Greg Kroah-Hartman
2012-07-26 21:29 ` [ 32/40] vmscan: promote shared file mapped pages Greg Kroah-Hartman
2012-07-26 21:29 ` [ 33/40] vmscan: activate executable pages after first usage Greg Kroah-Hartman
2012-07-26 21:29 ` [ 34/40] mm/vmscan.c: consider swap space when deciding whether to continue reclaim Greg Kroah-Hartman
2012-07-26 21:29 ` [ 35/40] mm: test PageSwapBacked in lumpy reclaim Greg Kroah-Hartman
2012-07-26 21:29 ` [ 36/40] mm: vmscan: convert global reclaim to per-memcg LRU lists Greg Kroah-Hartman
2012-07-30 0:25 ` Ben Hutchings
2012-07-30 15:29 ` Greg Kroah-Hartman
2012-07-26 21:29 ` [ 37/40] cpusets: avoid looping when storing to mems_allowed if one node remains set Greg Kroah-Hartman
2012-07-26 21:29 ` [ 38/40] cpusets: stall when updating mems_allowed for mempolicy or disjoint nodemask Greg Kroah-Hartman
2012-07-26 21:29 ` [ 39/40] cpuset: mm: reduce large amounts of memory barrier related damage v3 Greg Kroah-Hartman
2012-07-27 15:08 ` Herton Ronaldo Krzesinski
2012-07-27 15:23 ` Mel Gorman
2012-07-27 19:01 ` Greg Kroah-Hartman
2012-07-28 5:02 ` Herton Ronaldo Krzesinski
2012-07-28 10:26 ` Mel Gorman
2012-07-30 15:39 ` Greg Kroah-Hartman
2012-07-30 15:37 ` Greg Kroah-Hartman
2012-07-30 15:38 ` Greg Kroah-Hartman
2012-07-26 21:29 ` [ 40/40] mm/hugetlb: fix warning in alloc_huge_page/dequeue_huge_page_vma Greg Kroah-Hartman
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=20120726211411.751682159@linuxfoundation.org \
--to=gregkh@linuxfoundation.org \
--cc=akpm@linux-foundation.org \
--cc=alan@lxorguk.ukuu.org.uk \
--cc=cl@gentwo.org \
--cc=linux-kernel@vger.kernel.org \
--cc=mel@csn.ul.ie \
--cc=mgorman@suse.de \
--cc=sivanich@sgi.com \
--cc=stable@vger.kernel.org \
--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
Powered by JetHome