** Also affects: ubuntu
Importance: Undecided
Status: New
** Tags removed: intel-kernel-19.04
** Tags added: intel-kernel-19.10
** Description changed:
Description
There is a call trace during fio testing of IMSM RAID 5 array. Call
trace is attached.
How reproducible: always (after few hours of fio testing)
Steps to Reproduce:
1. Create IMSM RAID5 with 4 disks:
mdadm -C /dev/md/imsm0 -n 4 -e imsm /dev/nvme0n1 /dev/nvme1n1 /dev/nvme2n1
/dev/nvme3n1
mdadm -C /dev/md126 /dev/md/imsm0 -n4 -l 5 -c 64 -f
2. Increase number of RAID5 threads:
echo 4 > /sys/block/md126/md/group_thread_cnt
3. Trigger fio:
fio --time_based --name="fio_check=16=16=4kb=100" --filename=/dev/md126
--rw=randrw --rwmixwrite=100 --bs=4kb --direct=1 --do_verify=0 --eta=never
--iodepth=16 --ioengine=libaio --runtime=600 --ramp_time=600 --refill_buffers
--numjobs=16 --group_reporting --randrepeat=0 --thread --unified_rw_reporting=1
--cpus_allowed=2-17 --cpus_allowed_policy=split --disable_lat=1
--disable_slat=1 --disable_bw=1 --stonewall --norandommap --minimal
--output=results_16_16_4kb_100.log
Target Kernel: TBD
- Target Release: 19.04
+ Target Release: 19.10
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https://bugs.launchpad.net/bugs/1801282
Title:
[VROC]Call trace during IO on IMSM RAID 5 (fio performance check)
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