Current code of btrfs-convert have a bug of thread conflict, which caused
invalid memory accessing between threads, and make program panic.
This patch add a test item for above bug, as:
# ./misc-tests.sh
[TEST] 001-btrfstune-features
[TEST] 002-uuid-rewrite
[TEST] 003-zero-log
[TEST] 004-convert-thread-conflict
failed: btrfs-convert /root/btrfsprogs/tests/test.img
test failed for case 004-convert-thread-conflict
#
# cat misc-tests-results.txt
...
############### btrfs-convert /root/btrfsprogs/tests/test.img
trans 7 running 5
ctree.c:363: btrfs_cow_block: Assertion `1` failed.
btrfs-convert(btrfs_cow_block+0x92)[0x40acaf]
btrfs-convert(btrfs_search_slot+0x1cb)[0x40c50f]
btrfs-convert(btrfs_csum_file_block+0x20f)[0x41d83a]
btrfs-convert[0x43422d]
btrfs-convert[0x4342cd]
btrfs-convert[0x4345ca]
btrfs-convert[0x434767]
btrfs-convert[0x435770]
btrfs-convert[0x439748]
btrfs-convert(main+0x13f8)[0x43b09d]
/lib64/libc.so.6(__libc_start_main+0xfd)[0x335e01ecdd]
btrfs-convert[0x407649]
create btrfs filesystem:
blocksize: 4096
nodesize: 16384
features: extref, skinny-metadata (default)
creating btrfs metadata.
creating ext2fs image file.
failed: btrfs-convert /root/btrfsprogs/tests/test.img
test failed for case 004-convert-thread-conflict
#
Note that this bug is not happened every time, especilly in slow
device as loop(slow cpu with fast block device is likely to trigger).
I set loop count to 20 to make bug happened in 90% tests.
Suggested-by: David Sterba <dsterba@suse.com>
Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>
02abd61aa0