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tests: improve cache abort test

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Use bigger volume and slowdown writing to cache device.
This allows more simple to reach 'dirty' state.
Also document exactly 1 SIGINT has to fire aborting of flushing.
This commit is contained in:
Zdenek Kabelac 2020-09-13 11:33:13 +02:00
parent 64c8827cf3
commit 57e1e037b6
1 changed files with 16 additions and 9 deletions
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25
test/shell/lvconvert-cache-abort.sh
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@ -21,24 +21,28 @@ aux have_cache 1 3 0 || skip
aux prepare_vg 2
SIZE_MB=4
# Data device on later delayed dev1
lvcreate -L4 -n cpool $vg "$dev1"
lvconvert -y --type cache-pool $vg/cpool "$dev2"
lvcreate -H -L 4 -n $lv1 --chunksize 32k --cachemode writeback --cachepool $vg/cpool $vg "$dev2"
lvcreate -H -L $SIZE_MB -n $lv1 --chunksize 32k --cachemode writeback --cachepool $vg/cpool $vg "$dev2"
#
# Ensure cache gets promoted blocks
#
for i in $(seq 1 10) ; do
for i in $(seq 1 3) ; do
echo 3 >/proc/sys/vm/drop_caches
dd if=/dev/zero of="$DM_DEV_DIR/$vg/$lv1" bs=64K count=20 conv=fdatasync || true
dd if=/dev/zero of="$DM_DEV_DIR/$vg/$lv1" bs=1M count=$SIZE_MB conv=fdatasync || true
echo 3 >/proc/sys/vm/drop_caches
dd if="$DM_DEV_DIR/$vg/$lv1" of=/dev/null bs=64K count=20 || true
dd if="$DM_DEV_DIR/$vg/$lv1" of=/dev/null bs=1M count=$SIZE_MB || true
done
aux delay_dev "$dev2" 0 300 "$(get first_extent_sector "$dev2"):"
dd if=/dev/zero of="$DM_DEV_DIR/$vg/$lv1" bs=1M count=$SIZE_MB
lvdisplay --maps $vg
# Delay dev to ensure we have some time to 'capture' interrupt in flush
aux delay_dev "$dev1" 100 0 "$(get first_extent_sector "$dev1"):"
# TODO, how to make writeback cache dirty
test "$(get lv_field $vg/$lv1 cache_dirty_blocks)" -gt 0 || {
@ -46,9 +50,6 @@ test "$(get lv_field $vg/$lv1 cache_dirty_blocks)" -gt 0 || {
skip "Cannot make a dirty writeback cache LV."
}
sync
dd if=/dev/zero of="$DM_DEV_DIR/$vg/$lv1" bs=4k count=100 conv=fdatasync
LVM_TEST_TAG="kill_me_$PREFIX" lvconvert -v --splitcache $vg/$lv1 >logconvert 2>&1 &
PID_CONVERT=$!
for i in {1..50}; do
@ -57,10 +58,16 @@ for i in {1..50}; do
echo "Waiting for cleaner policy on $vg/$lv1"
sleep .05
done
# While lvconvert updated table to 'cleaner' policy now it
# should be running in 'Flushing' loop and just 1 KILL should
# cause abortion of flushing
kill -INT $PID_CONVERT
aux enable_dev "$dev1"
aux enable_dev "$dev2"
wait
#cat logconvert || true
grep -E "Flushing.*aborted" logconvert || {
cat logconvert || true
vgremove -f $vg