Bug #2645

panic with dsched fq and ioprio

Added by jyoung15 about 1 month ago.

Status:NewStart date:02/20/2014
Priority:NormalDue date:
Assignee:-% Done:

0%

Category:Kernel
Target version:-

Description

System panics under following conditions:

# sysctl dsched
dsched.policies: noop fq
dsched.debug: 0
dsched.policy.default: fq
dsched.policy.md0: noop
dsched.policy.acd0: noop
dsched.policy.10092514011426: noop
dsched.policy.da0: fq
dsched.policy.da1: fq
dsched.policy._____WD-WCAT1H582396: fq
dsched.policy.cd0: noop
dsched.policy._____WD-WCAT1H604215: fq
dsched.fq.version: 1.1

# cat ioprio_test.sh
#!/bin/sh
rm -f ioprio1 ioprio9 data_file1 data_file9
dd if=/dev/random bs=1m count=1000 of=data_file1
dd if=/dev/random bs=1m count=1000 of=data_file9
time sh -c 'ioprio -n 1 dd if=data_file1 bs=1m count=1000 of=ioprio1; sync; echo ioprio1 done' &
time sh -c 'ioprio -n 9 dd if=data_file9 bs=1m count=1000 of=ioprio9; sync; echo ioprio9 done' &

# ./ioprio_test.sh

(panics here)

Issue is reproducible. Using unmodified 3.6-RELEASE with HAMMER FS. Hardware is Dell PowerEdge R415 with LSI (mpt0) RAID card.

# uname -a
DragonFly NNINPABE1NB02 3.6-RELEASE DragonFly v3.6.0-RELEASE #8: Fri Nov 22 13:22:00 PST 2013 :/usr/obj/build/home/justin/src/sys/X86_64_GENERIC x86_64

core.txt.0 and info.0 attached. vmcore.0 can be uploaded upon request.

core.txt.0 (41.2 KB) jyoung15, 02/20/2014 07:27 AM

info.0 (503 Bytes) jyoung15, 02/20/2014 07:27 AM

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