58 lines
1 KiB
Text
58 lines
1 KiB
Text
devs="$dev0 $dev1 $dev2 $dev3 $dev4 $dev5"
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runtime=120
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pid=""
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old=`cat /proc/sys/vm/dirty_background_ratio`
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test_write_action()
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{
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while true; do
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echo check > /sys/block/md0/md/sync_action &> /dev/null
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sleep 0.1
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echo idle > /sys/block/md0/md/sync_action &> /dev/null
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done
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}
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test_write_back()
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{
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fio -filename=$md0 -bs=4k -rw=write -numjobs=1 -name=test \
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-time_based -runtime=$runtime &> /dev/null
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}
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set_up_test()
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{
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fio -h &> /dev/null || die "fio not found"
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# create a simple raid6
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mdadm -Cv -R -n 6 -l6 $md0 $devs --assume-clean || die "create raid6 failed"
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# trigger dirty pages write back
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echo 0 > /proc/sys/vm/dirty_background_ratio
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}
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clean_up_test()
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{
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echo $old > /proc/sys/vm/dirty_background_ratio
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pkill -9 fio
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kill -9 $pid
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sleep 2
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if ps $pid | tail -1 | awk '{print $3}' | grep D; then
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die "thread that is writing sysfs is stuck in D state, deadlock is triggered"
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fi
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mdadm -S $md0
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}
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trap 'clean_up_test' EXIT
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set_up_test || die "set up test failed"
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test_write_back &
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test_write_action &
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pid="$!"
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sleep $runtime
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exit 0
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