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53bad89a7b
With older kernels this test can't work reliable, since 'suspend' used to clean all dirty blocks (taking even several seconds).
89 lines
2.7 KiB
Bash
89 lines
2.7 KiB
Bash
#!/usr/bin/env bash
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# Copyright (C) 2017 Red Hat, Inc. All rights reserved.
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#
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# This copyrighted material is made available to anyone wishing to use,
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# modify, copy, or redistribute it subject to the terms and conditions
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# of the GNU General Public License v.2.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software Foundation,
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# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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# Exercise cache flushing is abortable
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SKIP_WITH_LVMPOLLD=1
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. lib/inittest
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aux have_cache 1 3 0 || skip
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aux prepare_vg 2
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SIZE_MB=4
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# Data device on later delayed dev1
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lvcreate -L4 -n cpool $vg "$dev1"
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lvconvert -y --type cache-pool $vg/cpool "$dev2"
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lvcreate -H -L $SIZE_MB -n $lv1 --chunksize 32k --cachemode writeback --cachepool $vg/cpool $vg "$dev2"
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#
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# Ensure cache gets promoted blocks
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#
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for i in $(seq 1 3) ; do
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echo 3 >/proc/sys/vm/drop_caches
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dd if=/dev/zero of="$DM_DEV_DIR/$vg/$lv1" bs=1M count=$SIZE_MB conv=fdatasync || true
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echo 3 >/proc/sys/vm/drop_caches
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dd if="$DM_DEV_DIR/$vg/$lv1" of=/dev/null bs=1M count=$SIZE_MB || true
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done
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aux delay_dev "$dev2" 0 300 "$(get first_extent_sector "$dev2"):"
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dd if=/dev/zero of="$DM_DEV_DIR/$vg/$lv1" bs=1M count=$SIZE_MB
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lvdisplay --maps $vg
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# Delay dev to ensure we have some time to 'capture' interrupt in flush
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# TODO, how to make writeback cache dirty
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test "$(get lv_field $vg/$lv1 cache_dirty_blocks)" -gt 0 || {
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lvdisplay --maps $vg
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skip "Cannot make a dirty writeback cache LV."
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}
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LVM_TEST_TAG="kill_me_$PREFIX" lvconvert -vvvv --splitcache $vg/$lv1 >logconvert 2>&1 &
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PID_CONVERT=$!
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for i in {1..50}; do
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dmsetup table "$vg-$lv1" |& tee out
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grep cleaner out && break
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echo "$i: Waiting for cleaner policy on $vg/$lv1"
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sleep .05
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done
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test "$i" -ge 49 && die "Waited for cleaner policy on $vg/$lv1 too long!"
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# While lvconvert updated table to 'cleaner' policy now it
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# should be running in 'Flushing' loop and just 1 KILL should
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# cause abortion of flushing
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kill -INT $PID_CONVERT
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aux enable_dev "$dev2"
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wait
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#cat logconvert || true
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# Problem of this test is, in older kernels, even the initial change to cleaner
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# policy table line causes long suspend which in practice is cleaning all the
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# dirty blocks - so the test can't really break the cache clearing.
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#
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# So the failure of test is reported only for recent kernels > 5.6
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# ans skipped otherwise - as those can't be fixed anyway
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grep -E "Flushing.*aborted" logconvert || {
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cat logconvert || true
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vgremove -f $vg
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aux kernel_at_least 5 6 || skip "Cache missed to abort flushing with older kernel"
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die "Flushing of $vg/$lv1 not aborted ?"
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}
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# check the table got restored
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check grep_dmsetup table $vg-$lv1 "writeback"
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vgremove -f $vg
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