Re: [LKP] [btrfs] "fio: pid=2214, got signal=7" error showed in fio test for btrfs

[Ye Xiaolong <xiaolong.ye@intel.com>]

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Attach kmsg and reproduce script.

Note: kernel cmdline contained "memmap=104G!4G memmap=104G!132G"

Thanks,
Xiaolong

On 03/29, kernel test robot wrote:
>Hi,
>
>We detected below error messages in fio pmem test for btrfs.
>
>machine: Intel(R) Xeon(R) CPU E5-2695 v3 @ 2.30GHz with 256G memory
>kernel: v4.10 
>test parameters:
>
>[global]
>bs=2M
>ioengine=mmap
>iodepth=32
>size=7669584457
>direct=0
>runtime=200
>invalidate=1
>fallocate=posix
>group_reporting
>
>time_based
>
>[task_0]
>rw=write
>directory=/fs/pmem0
>numjobs=14
>
>[task_1]
>rw=write
>directory=/fs/pmem1
>numjobs=14
>
>
>==> /tmp/stderr <==
>fio: pid=2214, got signal=7
>fio: pid=2215, got signal=7
>fio: pid=2217, got signal=7
>fio: pid=2220, got signal=7
>fio: pid=2222, got signal=7
>fio: pid=2224, got signal=7
>fio: pid=2225, got signal=7
>fio: pid=2227, got signal=7
>fio: pid=2216, got signal=7
>fio: pid=2218, got signal=7
>fio: pid=2219, got signal=7
>fio: pid=2221, got signal=7
>fio: pid=2223, got signal=7
>fio: pid=2226, got signal=7
>fio: pid=2200, got signal=7
>fio: pid=2201, got signal=7
>fio: pid=2203, got signal=7
>fio: pid=2204, got signal=7
>fio: pid=2205, got signal=7
>fio: pid=2208, got signal=7
>fio: pid=2209, got signal=7
>fio: pid=2210, got signal=7
>fio: pid=2211, got signal=7
>fio: pid=2212, got signal=7
>fio: pid=2213, got signal=7
>fio: pid=2202, got signal=7
>fio: pid=2206, got signal=7
>fio: pid=2207, got signal=7
>fio: file hash not empty on exit
>
>while fio test is ok for ext4 with the same test parameters.
>Attached reproduce.sh may help reproduce the problem.
>
>Thanks,
>Xiaolong



[-- Attachment #2: kmsg.xz --]
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[-- Attachment #3: reproduce --]
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modprobe nd_e820
dmsetup remove_all
wipefs -a --force /dev/pmem0
wipefs -a --force /dev/pmem1
mkfs -t btrfs /dev/pmem1
mkfs -t btrfs /dev/pmem0
mkdir -p /fs/pmem0
mount -t btrfs /dev/pmem0 /fs/pmem0
mkdir -p /fs/pmem1
mount -t btrfs /dev/pmem1 /fs/pmem1

for file in /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor
do
	echo performance > $file
done

echo '
[global]
bs=2M
ioengine=mmap
iodepth=32
size=7669584457
direct=0
runtime=200
invalidate=1
fallocate=posix
group_reporting

time_based

[task_0]
rw=write
directory=/fs/pmem0
numjobs=14

[task_1]
rw=write
directory=/fs/pmem1
numjobs=14' | fio --output-format=json -