59 lines
1.5 KiB
Bash
Executable File
59 lines
1.5 KiB
Bash
Executable File
#!/bin/bash
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# SPDX-License-Identifier: GPL-2.0
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# Kselftest framework requirement - SKIP code is 4.
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ksft_skip=4
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if [ $EUID -ne 0 ]
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then
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echo "Run as root"
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exit $ksft_skip
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fi
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damon_sysfs="/sys/kernel/mm/damon/admin"
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if [ ! -d "$damon_sysfs" ]
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then
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echo "damon sysfs not found"
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exit $ksft_skip
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fi
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# clear log
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dmesg -C
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# start DAMON with a scheme
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echo 1 > "$damon_sysfs/kdamonds/nr_kdamonds"
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echo 1 > "$damon_sysfs/kdamonds/0/contexts/nr_contexts"
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echo "vaddr" > "$damon_sysfs/kdamonds/0/contexts/0/operations"
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echo 1 > "$damon_sysfs/kdamonds/0/contexts/0/targets/nr_targets"
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echo $$ > "$damon_sysfs/kdamonds/0/contexts/0/targets/0/pid_target"
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echo 1 > "$damon_sysfs/kdamonds/0/contexts/0/schemes/nr_schemes"
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scheme_dir="$damon_sysfs/kdamonds/0/contexts/0/schemes/0"
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echo 4096000 > "$scheme_dir/access_pattern/sz/max"
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echo 20 > "$scheme_dir/access_pattern/nr_accesses/max"
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echo 1024 > "$scheme_dir/access_pattern/age/max"
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echo "on" > "$damon_sysfs/kdamonds/0/state"
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sleep 0.3
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# remove scheme sysfs dir
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echo 0 > "$damon_sysfs/kdamonds/0/contexts/0/schemes/nr_schemes"
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# try to update stat of already removed scheme sysfs dir
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echo "update_schemes_stats" > "$damon_sysfs/kdamonds/0/state"
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if dmesg | grep -q BUG
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then
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echo "update_schemes_stats triggers a kernel bug"
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dmesg
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exit 1
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fi
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# try to update tried regions of already removed scheme sysfs dir
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echo "update_schemes_tried_regions" > "$damon_sysfs/kdamonds/0/state"
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if dmesg | grep -q BUG
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then
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echo "update_schemes_tried_regions triggers a kernel bug"
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dmesg
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exit 1
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fi
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echo "off" > "$damon_sysfs/kdamonds/0/state"
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