* [lkp-robot] [mm, page_alloc] d34b0733b4: will-it-scale.per_thread_ops -4% regression
@ 2017-05-12 4:47 kernel test robot
2017-05-12 9:24 ` Mel Gorman
0 siblings, 1 reply; 3+ messages in thread
From: kernel test robot @ 2017-05-12 4:47 UTC (permalink / raw)
To: lkp
[-- Attachment #1: Type: text/plain, Size: 5592 bytes --]
Greeting,
We noticed a -4% regression of will-it-scale.per_thread_ops due to commit:
commit: d34b0733b452ca3ef1dee36436dab08b8aa6a85c ("Revert "mm, page_alloc: only use per-cpu allocator for irq-safe requests"")
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master
in testcase: will-it-scale
on test machine: 256 threads Phi with 96G memory
with following parameters:
nr_task: 100%
mode: thread
test: page_fault2
cpufreq_governor: performance
test-description: Will It Scale takes a testcase and runs it from 1 through to n parallel copies to see if the testcase will scale. It builds both a process and threads based test in order to see any differences between the two.
test-url: https://github.com/antonblanchard/will-it-scale
Details are as below:
-------------------------------------------------------------------------------------------------->
To reproduce:
git clone https://github.com/01org/lkp-tests.git
cd lkp-tests
bin/lkp install job.yaml # job file is attached in this email
bin/lkp run job.yaml
testcase/path_params/tbox_group/run: will-it-scale/100%-thread-page_fault2-performance/lkp-knl-f1
f61143c45077df4f d34b0733b452ca3ef1dee36436
---------------- --------------------------
%stddev change %stddev
\ | \
2363 -4% 2278 will-it-scale.per_thread_ops
9383 -3% 9069 will-it-scale.time.percent_of_cpu_this_job_got
1.845e+08 -3% 1.782e+08 will-it-scale.time.minor_page_faults
29880 -4% 28713 will-it-scale.time.system_time
2085066 ± 4% -5% 1981442 interrupts.CAL:Function_call_interrupts
1:4 -25% :4 stderr./lkp/lkp/src/monitors/wrapper:#:/lkp/lkp/src/monitors/wrapper:cannot_create/tmp/lkp/fifo-kmsg:Interrupted_system_call
1.852e+08 -3% 1.789e+08 perf-stat.page-faults
1.852e+08 -3% 1.789e+08 perf-stat.minor-faults
6.039e+10 -3% 5.832e+10 perf-stat.cache-references
1.136e+10 -4% 1.091e+10 perf-stat.iTLB-load-misses
4.297e+13 -4% 4.122e+13 perf-stat.cpu-cycles
4.623e+12 -4% 4.431e+12 perf-stat.instructions
4.624e+12 -4% 4.428e+12 perf-stat.iTLB-loads
1.171e+10 -4% 1.12e+10 perf-stat.cache-misses
1.658e+12 -4% 1.583e+12 perf-stat.branch-instructions
0.83 -7% 0.77 perf-stat.branch-miss-rate%
1.369e+10 -11% 1.219e+10 perf-stat.branch-misses
will-it-scale.per_thread_ops
2380 ++-------------------------------------------------------------------+
| .*..* .*..*. .*..*. .*..|
2360 *+. .*. + .*.. .*.. .*. *.. .*. *..*..*.*..*..* *
| * *. *.*. * * |
2340 ++ |
| |
2320 ++ |
| O |
2300 ++ |
| |
2280 O+ O O O |
| O O O O O O O O O |
2260 ++ O O O O O |
| |
2240 ++-------------------------------------------------------------------+
will-it-scale.time.system_time
30400 ++------------------------------------------------------------------+
30200 *+. *. *. |
| * : *.. + *.. *..* |
30000 ++ + .*. : + .*. .. + .*.*..*
29800 ++ *..*.*..*. *.. : *.*..* *.*..*. * *. |
29600 ++ * |
29400 ++ |
| |
29200 ++ |
29000 ++ |
28800 ++ O O O O O O O |
28600 ++ O O O O |
O O O O O O O |
28400 ++ |
28200 ++--------------O---------------------------------------------------+
[*] 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
[-- Attachment #2: job-script.ksh --]
[-- Type: text/plain, Size: 6784 bytes --]
#!/bin/sh
export_top_env()
{
export suite='will-it-scale'
export testcase='will-it-scale'
export category='benchmark'
export nr_task=256
export job_origin='/lkp/lkp/.src-20170426-224010/allot/cyclic:linux-devel:devel-hourly/lkp-knl-f1/will-it-scale-100.yaml'
export queue='bisect'
export testbox='lkp-knl-f1'
export tbox_group='lkp-knl-f1'
export submit_id='59127b640b9a9371627261dc'
export job_file='/lkp/scheduled/lkp-knl-f1/will-it-scale-100%-thread-page_fault2-performance-debian-x86_64-2016-08-31.cgz-d34b0733b452ca3ef1dee36436dab08b8aa6a85c-20170510-94562-xjut9e-0.yaml'
export id='467c63929f24d489ec9bbeab516c8528cccfc7df'
export model='Phi'
export nr_cpu=256
export memory='96G'
export nr_ssd_partitions=
export swap_partitions=
export rootfs_partition=
export commit='d34b0733b452ca3ef1dee36436dab08b8aa6a85c'
export kconfig='x86_64-kexec'
export compiler='gcc-6'
export rootfs='debian-x86_64-2016-08-31.cgz'
export enqueue_time='2017-05-10 10:31:01 +0800'
export _id='59127b640b9a9371627261dc'
export _rt='/result/will-it-scale/100%-thread-page_fault2-performance/lkp-knl-f1/debian-x86_64-2016-08-31.cgz/x86_64-kexec/gcc-6/d34b0733b452ca3ef1dee36436dab08b8aa6a85c'
export user='lkp'
export head_commit='ae6dbf83c88ae6678b80897d4e37921da02e6696'
export base_commit='5a7ad1146caa895ad718a534399e38bd2ba721b7'
export branch='linux-devel/devel-hourly-2017043014'
export result_root='/result/will-it-scale/100%-thread-page_fault2-performance/lkp-knl-f1/debian-x86_64-2016-08-31.cgz/x86_64-kexec/gcc-6/d34b0733b452ca3ef1dee36436dab08b8aa6a85c/0'
export LKP_SERVER='inn'
export max_uptime=1500
export initrd='/osimage/debian/debian-x86_64-2016-08-31.cgz'
export bootloader_append='root=/dev/ram0
user=lkp
job=/lkp/scheduled/lkp-knl-f1/will-it-scale-100%-thread-page_fault2-performance-debian-x86_64-2016-08-31.cgz-d34b0733b452ca3ef1dee36436dab08b8aa6a85c-20170510-94562-xjut9e-0.yaml
ARCH=x86_64
kconfig=x86_64-kexec
branch=linux-devel/devel-hourly-2017043014
commit=d34b0733b452ca3ef1dee36436dab08b8aa6a85c
BOOT_IMAGE=/pkg/linux/x86_64-kexec/gcc-6/d34b0733b452ca3ef1dee36436dab08b8aa6a85c/vmlinuz-4.11.0-rc7-00043-gd34b073
max_uptime=1500
RESULT_ROOT=/result/will-it-scale/100%-thread-page_fault2-performance/lkp-knl-f1/debian-x86_64-2016-08-31.cgz/x86_64-kexec/gcc-6/d34b0733b452ca3ef1dee36436dab08b8aa6a85c/0
LKP_SERVER=inn
debug
apic=debug
sysrq_always_enabled
rcupdate.rcu_cpu_stall_timeout=100
net.ifnames=0
printk.devkmsg=on
panic=-1
softlockup_panic=1
nmi_watchdog=panic
oops=panic
load_ramdisk=2
prompt_ramdisk=0
drbd.minor_count=8
systemd.log_level=err
ignore_loglevel
earlyprintk=ttyS0,115200
console=ttyS0,115200
console=tty0
vga=normal
rw'
export lkp_initrd='/lkp/lkp/lkp-x86_64.cgz'
export modules_initrd='/pkg/linux/x86_64-kexec/gcc-6/d34b0733b452ca3ef1dee36436dab08b8aa6a85c/modules.cgz'
export bm_initrd='/osimage/deps/debian-x86_64-2016-08-31.cgz/lkp_2017-05-01.cgz,/osimage/deps/debian-x86_64-2016-08-31.cgz/rsync-rootfs_2016-11-15.cgz,/osimage/deps/debian-x86_64-2016-08-31.cgz/run-ipconfig_2016-11-15.cgz,/osimage/deps/debian-x86_64-2016-08-31.cgz/will-it-scale_2016-11-15.cgz,/osimage/pkg/debian-x86_64-2016-08-31.cgz/will-it-scale-x86_64_2016-09-02.cgz,/osimage/deps/debian-x86_64-2016-08-31.cgz/iostat_2016-11-15.cgz,/osimage/deps/debian-x86_64-2016-08-31.cgz/turbostat_2016-11-15.cgz,/osimage/pkg/debian-x86_64-2016-08-31.cgz/turbostat-x86_64_2016-09-02.cgz,/osimage/deps/debian-x86_64-2016-08-31.cgz/perf_2017-04-24.cgz,/osimage/pkg/debian-x86_64-2016-08-31.cgz/perf-x86_64_2017-05-08.cgz,/osimage/deps/debian-x86_64-2016-08-31.cgz/hw_2016-11-15.cgz'
export site='inn'
export LKP_CGI_PORT=80
export LKP_CIFS_PORT=139
export repeat_to=2
export kernel='/pkg/linux/x86_64-kexec/gcc-6/d34b0733b452ca3ef1dee36436dab08b8aa6a85c/vmlinuz-4.11.0-rc7-00043-gd34b073'
export dequeue_time='2017-05-10 10:36:39 +0800'
export job_initrd='/lkp/scheduled/lkp-knl-f1/will-it-scale-100%-thread-page_fault2-performance-debian-x86_64-2016-08-31.cgz-d34b0733b452ca3ef1dee36436dab08b8aa6a85c-20170510-94562-xjut9e-0.cgz'
[ -n "$LKP_SRC" ] ||
export LKP_SRC=/lkp/${user:-lkp}/src
}
run_job()
{
echo $$ > $TMP/run-job.pid
. $LKP_SRC/lib/http.sh
. $LKP_SRC/lib/job.sh
. $LKP_SRC/lib/env.sh
export_top_env
run_setup $LKP_SRC/setup/cpufreq_governor 'performance'
run_monitor $LKP_SRC/monitors/wrapper kmsg
run_monitor $LKP_SRC/monitors/wrapper iostat
run_monitor $LKP_SRC/monitors/wrapper heartbeat
run_monitor $LKP_SRC/monitors/wrapper vmstat
run_monitor $LKP_SRC/monitors/wrapper numa-numastat
run_monitor $LKP_SRC/monitors/wrapper numa-vmstat
run_monitor $LKP_SRC/monitors/wrapper numa-meminfo
run_monitor $LKP_SRC/monitors/wrapper proc-vmstat
run_monitor $LKP_SRC/monitors/wrapper proc-stat
run_monitor $LKP_SRC/monitors/wrapper meminfo
run_monitor $LKP_SRC/monitors/wrapper slabinfo
run_monitor $LKP_SRC/monitors/wrapper interrupts
run_monitor $LKP_SRC/monitors/wrapper lock_stat
run_monitor $LKP_SRC/monitors/wrapper latency_stats
run_monitor $LKP_SRC/monitors/wrapper softirqs
run_monitor $LKP_SRC/monitors/one-shot/wrapper bdi_dev_mapping
run_monitor $LKP_SRC/monitors/wrapper diskstats
run_monitor $LKP_SRC/monitors/wrapper nfsstat
run_monitor $LKP_SRC/monitors/wrapper cpuidle
run_monitor $LKP_SRC/monitors/wrapper cpufreq-stats
run_monitor $LKP_SRC/monitors/wrapper turbostat
run_monitor $LKP_SRC/monitors/wrapper sched_debug
run_monitor $LKP_SRC/monitors/wrapper perf-stat
run_monitor $LKP_SRC/monitors/wrapper mpstat
run_monitor $LKP_SRC/monitors/no-stdout/wrapper perf-profile
run_monitor $LKP_SRC/monitors/wrapper oom-killer
run_monitor $LKP_SRC/monitors/plain/watchdog
run_monitor $LKP_SRC/monitors/wrapper nfs-hang
run_test mode='thread' test='page_fault2' $LKP_SRC/tests/wrapper will-it-scale
}
extract_stats()
{
$LKP_SRC/stats/wrapper will-it-scale
$LKP_SRC/stats/wrapper kmsg
$LKP_SRC/stats/wrapper iostat
$LKP_SRC/stats/wrapper vmstat
$LKP_SRC/stats/wrapper numa-numastat
$LKP_SRC/stats/wrapper numa-vmstat
$LKP_SRC/stats/wrapper numa-meminfo
$LKP_SRC/stats/wrapper proc-vmstat
$LKP_SRC/stats/wrapper meminfo
$LKP_SRC/stats/wrapper slabinfo
$LKP_SRC/stats/wrapper interrupts
$LKP_SRC/stats/wrapper lock_stat
$LKP_SRC/stats/wrapper latency_stats
$LKP_SRC/stats/wrapper softirqs
$LKP_SRC/stats/wrapper diskstats
$LKP_SRC/stats/wrapper nfsstat
$LKP_SRC/stats/wrapper cpuidle
$LKP_SRC/stats/wrapper turbostat
$LKP_SRC/stats/wrapper sched_debug
$LKP_SRC/stats/wrapper perf-stat
$LKP_SRC/stats/wrapper mpstat
$LKP_SRC/stats/wrapper perf-profile
$LKP_SRC/stats/wrapper time will-it-scale.time
$LKP_SRC/stats/wrapper time
$LKP_SRC/stats/wrapper dmesg
$LKP_SRC/stats/wrapper kmsg
$LKP_SRC/stats/wrapper stderr
$LKP_SRC/stats/wrapper last_state
}
"$@"
[-- Attachment #3: job.yaml --]
[-- Type: text/plain, Size: 4419 bytes --]
---
#! jobs/will-it-scale-100.yaml
suite: will-it-scale
testcase: will-it-scale
category: benchmark
nr_task: 100%
will-it-scale:
mode: thread
test: page_fault2
job_origin: "/lkp/lkp/.src-20170426-224010/allot/cyclic:linux-devel:devel-hourly/lkp-knl-f1/will-it-scale-100.yaml"
#! queue options
queue: bisect
testbox: lkp-knl-f1
tbox_group: lkp-knl-f1
submit_id: 59127b640b9a9371627261dc
job_file: "/lkp/scheduled/lkp-knl-f1/will-it-scale-100%-thread-page_fault2-performance-debian-x86_64-2016-08-31.cgz-d34b0733b452ca3ef1dee36436dab08b8aa6a85c-20170510-94562-xjut9e-0.yaml"
id: 467c63929f24d489ec9bbeab516c8528cccfc7df
#! hosts/lkp-knl-f1
model: Phi
nr_cpu: 256
memory: 96G
nr_ssd_partitions:
swap_partitions:
rootfs_partition:
#! include/category/benchmark
kmsg:
iostat:
heartbeat:
vmstat:
numa-numastat:
numa-vmstat:
numa-meminfo:
proc-vmstat:
proc-stat:
meminfo:
slabinfo:
interrupts:
lock_stat:
latency_stats:
softirqs:
bdi_dev_mapping:
diskstats:
nfsstat:
cpuidle:
cpufreq-stats:
turbostat:
sched_debug:
perf-stat:
mpstat:
perf-profile:
#! include/category/ALL
cpufreq_governor: performance
#! include/queue/cyclic
commit: d34b0733b452ca3ef1dee36436dab08b8aa6a85c
#! include/testbox/lkp-knl-f1
kconfig: x86_64-kexec
#! default params
compiler: gcc-6
rootfs: debian-x86_64-2016-08-31.cgz
enqueue_time: 2017-05-10 10:31:01.173541316 +08:00
_id: 59127b640b9a9371627261dc
_rt: "/result/will-it-scale/100%-thread-page_fault2-performance/lkp-knl-f1/debian-x86_64-2016-08-31.cgz/x86_64-kexec/gcc-6/d34b0733b452ca3ef1dee36436dab08b8aa6a85c"
#! schedule options
user: lkp
head_commit: ae6dbf83c88ae6678b80897d4e37921da02e6696
base_commit: 5a7ad1146caa895ad718a534399e38bd2ba721b7
branch: linux-devel/devel-hourly-2017043014
result_root: "/result/will-it-scale/100%-thread-page_fault2-performance/lkp-knl-f1/debian-x86_64-2016-08-31.cgz/x86_64-kexec/gcc-6/d34b0733b452ca3ef1dee36436dab08b8aa6a85c/0"
LKP_SERVER: inn
max_uptime: 1500
initrd: "/osimage/debian/debian-x86_64-2016-08-31.cgz"
bootloader_append:
- root=/dev/ram0
- user=lkp
- job=/lkp/scheduled/lkp-knl-f1/will-it-scale-100%-thread-page_fault2-performance-debian-x86_64-2016-08-31.cgz-d34b0733b452ca3ef1dee36436dab08b8aa6a85c-20170510-94562-xjut9e-0.yaml
- ARCH=x86_64
- kconfig=x86_64-kexec
- branch=linux-devel/devel-hourly-2017043014
- commit=d34b0733b452ca3ef1dee36436dab08b8aa6a85c
- BOOT_IMAGE=/pkg/linux/x86_64-kexec/gcc-6/d34b0733b452ca3ef1dee36436dab08b8aa6a85c/vmlinuz-4.11.0-rc7-00043-gd34b073
- max_uptime=1500
- RESULT_ROOT=/result/will-it-scale/100%-thread-page_fault2-performance/lkp-knl-f1/debian-x86_64-2016-08-31.cgz/x86_64-kexec/gcc-6/d34b0733b452ca3ef1dee36436dab08b8aa6a85c/0
- LKP_SERVER=inn
- debug
- apic=debug
- sysrq_always_enabled
- rcupdate.rcu_cpu_stall_timeout=100
- net.ifnames=0
- printk.devkmsg=on
- panic=-1
- softlockup_panic=1
- nmi_watchdog=panic
- oops=panic
- load_ramdisk=2
- prompt_ramdisk=0
- drbd.minor_count=8
- systemd.log_level=err
- ignore_loglevel
- earlyprintk=ttyS0,115200
- console=ttyS0,115200
- console=tty0
- vga=normal
- rw
lkp_initrd: "/lkp/lkp/lkp-x86_64.cgz"
modules_initrd: "/pkg/linux/x86_64-kexec/gcc-6/d34b0733b452ca3ef1dee36436dab08b8aa6a85c/modules.cgz"
bm_initrd: "/osimage/deps/debian-x86_64-2016-08-31.cgz/lkp_2017-05-01.cgz,/osimage/deps/debian-x86_64-2016-08-31.cgz/rsync-rootfs_2016-11-15.cgz,/osimage/deps/debian-x86_64-2016-08-31.cgz/run-ipconfig_2016-11-15.cgz,/osimage/deps/debian-x86_64-2016-08-31.cgz/will-it-scale_2016-11-15.cgz,/osimage/pkg/debian-x86_64-2016-08-31.cgz/will-it-scale-x86_64_2016-09-02.cgz,/osimage/deps/debian-x86_64-2016-08-31.cgz/iostat_2016-11-15.cgz,/osimage/deps/debian-x86_64-2016-08-31.cgz/turbostat_2016-11-15.cgz,/osimage/pkg/debian-x86_64-2016-08-31.cgz/turbostat-x86_64_2016-09-02.cgz,/osimage/deps/debian-x86_64-2016-08-31.cgz/perf_2017-04-24.cgz,/osimage/pkg/debian-x86_64-2016-08-31.cgz/perf-x86_64_2017-05-08.cgz,/osimage/deps/debian-x86_64-2016-08-31.cgz/hw_2016-11-15.cgz"
site: inn
#! /lkp/lkp/.src-20170430-210822/include/site/inn
LKP_CGI_PORT: 80
LKP_CIFS_PORT: 139
oom-killer:
watchdog:
nfs-hang:
#! runtime status
repeat_to: 2
#! user overrides
kernel: "/pkg/linux/x86_64-kexec/gcc-6/d34b0733b452ca3ef1dee36436dab08b8aa6a85c/vmlinuz-4.11.0-rc7-00043-gd34b073"
dequeue_time: 2017-05-10 10:36:39.311087432 +08:00
#! /lkp/lkp/.src-20170509-205611/include/site/inn
job_state: finished
loadavg: '111.23'
[-- Attachment #4: reproduce.ksh --]
[-- Type: text/plain, Size: 142 bytes --]
for file in /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor
do
echo performance > $file
done
./runtest.py page_fault2 295 thread 256
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [lkp-robot] [mm, page_alloc] d34b0733b4: will-it-scale.per_thread_ops -4% regression
2017-05-12 4:47 [lkp-robot] [mm, page_alloc] d34b0733b4: will-it-scale.per_thread_ops -4% regression kernel test robot
@ 2017-05-12 9:24 ` Mel Gorman
2017-05-14 5:48 ` Ye Xiaolong
0 siblings, 1 reply; 3+ messages in thread
From: Mel Gorman @ 2017-05-12 9:24 UTC (permalink / raw)
To: lkp
[-- Attachment #1: Type: text/plain, Size: 1155 bytes --]
On Fri, May 12, 2017 at 12:47:23PM +0800, kernel test robot wrote:
>
> Greeting,
>
> We noticed a -4% regression of will-it-scale.per_thread_ops due to commit:
>
> commit: d34b0733b452ca3ef1dee36436dab08b8aa6a85c ("Revert "mm, page_alloc: only use per-cpu allocator for irq-safe requests"")
> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master
>
> in testcase: will-it-scale
> on test machine: 256 threads Phi with 96G memory
> with following parameters:
>
> nr_task: 100%
> mode: thread
> test: page_fault2
> cpufreq_governor: performance
>
> test-description: Will It Scale takes a testcase and runs it from 1 through to n parallel copies to see if the testcase will scale. It builds both a process and threads based test in order to see any differences between the two.
> test-url: https://github.com/antonblanchard/will-it-scale
>
Regrettably, this is a regression that cannot be avoided. The revert removes
an optimisation that has consequences for network-intensive workloads.
The whole idea needs to be revisited and the revert was the safest
option for 4.11.
--
Mel Gorman
SUSE Labs
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [lkp-robot] [mm, page_alloc] d34b0733b4: will-it-scale.per_thread_ops -4% regression
2017-05-12 9:24 ` Mel Gorman
@ 2017-05-14 5:48 ` Ye Xiaolong
0 siblings, 0 replies; 3+ messages in thread
From: Ye Xiaolong @ 2017-05-14 5:48 UTC (permalink / raw)
To: lkp
[-- Attachment #1: Type: text/plain, Size: 1257 bytes --]
On 05/12, Mel Gorman wrote:
>On Fri, May 12, 2017 at 12:47:23PM +0800, kernel test robot wrote:
>>
>> Greeting,
>>
>> We noticed a -4% regression of will-it-scale.per_thread_ops due to commit:
>>
>> commit: d34b0733b452ca3ef1dee36436dab08b8aa6a85c ("Revert "mm, page_alloc: only use per-cpu allocator for irq-safe requests"")
>> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master
>>
>> in testcase: will-it-scale
>> on test machine: 256 threads Phi with 96G memory
>> with following parameters:
>>
>> nr_task: 100%
>> mode: thread
>> test: page_fault2
>> cpufreq_governor: performance
>>
>> test-description: Will It Scale takes a testcase and runs it from 1 through to n parallel copies to see if the testcase will scale. It builds both a process and threads based test in order to see any differences between the two.
>> test-url: https://github.com/antonblanchard/will-it-scale
>>
>
>Regrettably, this is a regression that cannot be avoided. The revert removes
>an optimisation that has consequences for network-intensive workloads.
>The whole idea needs to be revisited and the revert was the safest
>option for 4.11.
Thanks for the explanation.
Xiaolong
>
>--
>Mel Gorman
>SUSE Labs
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2017-05-14 5:48 UTC | newest]
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2017-05-12 4:47 [lkp-robot] [mm, page_alloc] d34b0733b4: will-it-scale.per_thread_ops -4% regression kernel test robot
2017-05-12 9:24 ` Mel Gorman
2017-05-14 5:48 ` Ye Xiaolong
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