linux-kernel - [lkp] [fs/fs] 1ee4402729: boot-slabinfo.num

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Message-ID: <20160804085020.GH19697@yexl-desktop>
Date:	Thu, 4 Aug 2016 16:50:20 +0800
From:	kernel test robot <xiaolong.ye@...el.com>
To:	Dave Chinner <dchinner@...hat.com>
Cc:	Stephen Rothwell <sfr@...b.auug.org.au>,
	Josef Bacik <jbacik@...com>, Brian Foster <bfoster@...hat.com>,
	Jan Kara <jack@...e.cz>,
	Holger Hoffstätte 
	<holger.hoffstaette@...lied-asynchrony.com>,
	Al Viro <viro@...IV.linux.org.uk>,
	Andrew Morton <akpm@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>, lkp@...org
Subject: [lkp] [fs/fs]  1ee4402729: boot-slabinfo.num_objs +6.0% increase


FYI, we noticed boot-slabinfo.num_objs +6.0% increase due to commit:

commit 1ee44027297ae95b48013acd3a43672ca8acb59c ("fs/fs-writeback.c: add a new writeback list for sync")
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master

in testcase: boot
on test machine: 1 threads qemu-system-x86_64 -enable-kvm -cpu Nehalem with 1G memory
with following parameters:

	path_params: 1
	run: 



Disclaimer:
Results have been estimated based on internal Intel analysis and are provided
for informational purposes only. Any difference in system hardware or software
design or configuration may affect actual performance.

Details are as below:
-------------------------------------------------------------------------------------------------->



=========================================================================================
compiler/kconfig/rootfs/sleep/tbox_group/testcase:
  gcc-6/x86_64-allyesdebian+CONFIG_DEBUG_INFO_REDUCED/debian-x86_64-2015-02-07.cgz/1/vm-intel12-1G/boot

commit: 
  5596c8e7f1 ("block: restore /proc/partitions to not display non-partitionable removable devices")
  1ee4402729 ("fs/fs-writeback.c: add a new writeback list for sync")

5596c8e7f1ebc36f 1ee44027297ae95b48013acd3a 
---------------- -------------------------- 
         %stddev     %change         %stddev
             \          |                \  
    176268 ±  0%      +6.0%     186870 ±  0%  boot-slabinfo.num_objs



                               boot-slabinfo.num_objs

  190000 ++-----------------------------------------------------------------+
         |                                                                  |
  188000 OO OOO                 O                                           |
  186000 ++      OOO OOOO OOO OO O OOO OO                                   |
         |     O                                                            |
  184000 ++                                                                 |
         |                                                                  |
  182000 ++                                                                 |
         |                                                                  |
  180000 ++                                                                 |
  178000 ++                                                                 |
         |                         *        **  ***.**     *.    .*         |
  176000 *+ ****.***.** *.***.*** :: *.  *.*  :+      **.**  ****  **.****.**
         |:+           ::        :: :: * :    *                             |
  174000 +*------------*---------*--*---*-----------------------------------+




	[*] bisect-good sample
	[O] bisect-bad  sample





Thanks,
Xiaolong

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