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Subject[lkp] [mm] 55834c5909: boot-slabinfo.num_objs +31.9% increasement

FYI, we noticed boot-slabinfo.num_objs +31.9% increasement due to commit:

commit 55834c59098d0c5a97b0f3247e55832b67facdcf ("mm: kasan: initial memory quarantine implementation")
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master

in testcase: boot
on test machine: vm-lkp-wsx03-2G: 2 threads qemu-system-x86_64 -enable-kvm -cpu host with 2G memory
with following parameters: sleep=1


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


=========================================================================================
compiler/kconfig/rootfs/sleep/tbox_group/testcase:
gcc-6/x86_64-randconfig-s4-05280557/debian-x86_64-2015-02-07.cgz/1/vm-lkp-wsx03-2G/boot

commit:
b8f1a75d61d8405a753380c6fb17ba84a5603cd4
55834c59098d0c5a97b0f3247e55832b67facdcf

b8f1a75d61d8405a 55834c59098d0c5a97b0f3247e
---------------- --------------------------
%stddev %change %stddev
\ | \
165450 ± 0% +31.9% 218176 ± 1% boot-slabinfo.num_objs
19095 ± 5% +104.3% 39013 ± 3% boot-slabinfo.num_pages
107.27 ± 2% +14.1% 122.43 ± 13% boot-time.boot
97.13 ± 1% +4.3% 101.31 ± 1% boot-time.idle
1105076 ± 0% -7.2% 1025056 ± 0% boot-meminfo.MemFree
36269 ± 12% +215.7% 114517 ± 5% boot-meminfo.SUnreclaim
76469 ± 5% +104.5% 156343 ± 4% boot-meminfo.Slab



boot-slabinfo.num_objs

230000 ++-----------------------------------------------------------------+
| O O |
220000 ++O O O OO OO O O OO OO |
OO O OOOO O OOOOOOO O O OO O |
210000 ++ |
| |
200000 ++ |
| |
190000 ++ |
| |
180000 ++ |
| |
170000 ++ |
********************************************************************
160000 ++-----------------------------------------------------------------+


boot-slabinfo.num_pages

45000 ++-------------O----------------------------------------------------+
| O O OO O O O O OOO |
40000 +O OOO OO OO O O |
O OO O O O O O OO O O |
| O O O |
35000 ++ |
| |
30000 ++ |
| |
25000 ++ |
| |
| * * *
20000 +* * * ** * * * * * * ** **** ** * * * * * * :: * *** *|
* * ** ** * * ** *** * ** *** * * * * * ** *** * ** ** ** * * |
15000 ++------------------------------------------------------------------+


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


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.


Thanks,
Xiaolong

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