Hi,
The generic/617 of fstests is a test case does IO_URING soak direct-IO
fsx test, but recently (about from v6.6-rc1 to now) it always fails on
overlayfs as [1], no matter the underlying fs is ext4 or xfs. But it
never failed on overlay before, likes [2].
So I thought it might be a regression of overlay or io-uring on current v6.6.
Please help to review, it's easy to reproduce. My system is Fedora-rawhide/RHEL-9,
with upstream mainline linux HEAD=dc912ba91b7e2fa74650a0fc22cccf0e0d50f371.
The generic/617.full output as [3].
Thanks,
Zorro
[1]
FSTYP -- overlay
PLATFORM -- Linux/x86_64 dell-xxxx-xxx 6.6.0-rc2+ #1 SMP PREEMPT_DYNAMIC Fri Sep 22 15:41:10 EDT 2023
MKFS_OPTIONS -- -m crc=1,finobt=1,rmapbt=0,reflink=1,inobtcount=1,bigtime=1 /mnt/xfstests/scratch
MOUNT_OPTIONS -- -o context=system_u:object_r:root_t:s0 /mnt/xfstests/scratch /mnt/xfstests/scratch/ovl-mnt
generic/617 - output mismatch (see /var/lib/xfstests/results//generic/617.out.bad)
--- tests/generic/617.out 2023-09-22 16:08:35.444572181 -0400
+++ /var/lib/xfstests/results//generic/617.out.bad 2023-09-22 19:33:29.240901008 -0400
@@ -1,2 +1,54 @@
QA output created by 617
+uring write bad io length: 0 instead of 8192
+short write: 0x0 bytes instead of 0x2000
+LOG DUMP (46 total operations):
+1( 1 mod 256): FALLOC 0x28c0d thru 0x2953a (0x92d bytes) EXTENDING
+2( 2 mod 256): TRUNCATE UP from 0x2953a to 0x81000
+3( 3 mod 256): ZERO 0x6f07 thru 0x14790 (0xd88a bytes)
...
(Run 'diff -u /var/lib/xfstests/tests/generic/617.out /var/lib/xfstests/results//generic/617.out.bad' to see the entire diff)
Ran: generic/617
Failures: generic/617
Failed 1 of 1 tests
[2]
FSTYP -- overlay
PLATFORM -- Linux/x86_64 hp-xxxxxx-xx 6.5.0-rc6+ #1 SMP PREEMPT_DYNAMIC Mon Aug 14 12:45:06 UTC 2023
MKFS_OPTIONS -- /mnt/scratch
MOUNT_OPTIONS -- -o context=system_u:object_r:root_t:s0 /mnt/scratch /mnt/scratch/ovl-mnt
generic/617 5s
Ran: generic/617
Passed all 1 tests
[3]
/var/lib/xfstests/ltp/fsx -S 0 -U -q -N 20000 -p 200 -o 128000 -l 600000 -r 4096 -t 4096 -w 4096 -Z /mnt/xfstests/test/ovl-mnt/junk
uring write bad io length: 0 instead of 8192
short write: 0x0 bytes instead of 0x2000
LOG DUMP (46 total operations):
1( 1 mod 256): FALLOC 0x28c0d thru 0x2953a (0x92d bytes) EXTENDING
2( 2 mod 256): TRUNCATE UP from 0x2953a to 0x81000
3( 3 mod 256): ZERO 0x6f07 thru 0x14790 (0xd88a bytes)
4( 4 mod 256): ZERO 0x4a097 thru 0x5dfc8 (0x13f32 bytes)
5( 5 mod 256): TRUNCATE DOWN from 0x81000 to 0x10000
6( 6 mod 256): MAPWRITE 0x74000 thru 0x78de7 (0x4de8 bytes)
7( 7 mod 256): SKIPPED (no operation)
8( 8 mod 256): MAPWRITE 0x52000 thru 0x57bf5 (0x5bf6 bytes)
9( 9 mod 256): DEDUPE 0x19000 thru 0x20fff (0x8000 bytes) to 0x57000 thru 0x5efff
10( 10 mod 256): COPY 0x64000 thru 0x6bfff (0x8000 bytes) to 0x1c000 thru 0x23fff
11( 11 mod 256): INSERT 0x38000 thru 0x46fff (0xf000 bytes)
12( 12 mod 256): WRITE 0x16000 thru 0x1cfff (0x7000 bytes)
13( 13 mod 256): MAPWRITE 0x3f000 thru 0x444d5 (0x54d6 bytes)
14( 14 mod 256): INSERT 0x83000 thru 0x8cfff (0xa000 bytes)
15( 15 mod 256): COPY 0x54000 thru 0x5dfff (0xa000 bytes) to 0x6d000 thru 0x76fff
16( 16 mod 256): PUNCH 0x34f3d thru 0x48c45 (0x13d09 bytes)
17( 17 mod 256): FALLOC 0x47bd5 thru 0x5a950 (0x12d7b bytes) INTERIOR
18( 18 mod 256): READ 0x20000 thru 0x3cfff (0x1d000 bytes)
19( 19 mod 256): READ 0xe000 thru 0x1cfff (0xf000 bytes)
20( 20 mod 256): MAPREAD 0x70000 thru 0x8d512 (0x1d513 bytes)
21( 21 mod 256): PUNCH 0x12773 thru 0x1f5b1 (0xce3f bytes)
22( 22 mod 256): DEDUPE 0x81000 thru 0x8ffff (0xf000 bytes) to 0x3b000 thru 0x49fff
23( 23 mod 256): CLONE 0x78000 thru 0x7efff (0x7000 bytes) to 0x1e000 thru 0x24fff
24( 24 mod 256): MAPREAD 0x1000 thru 0x1b6c1 (0x1a6c2 bytes)
25( 25 mod 256): SKIPPED (no operation)
26( 26 mod 256): FALLOC 0x43b4c thru 0x5ecb7 (0x1b16b bytes) INTERIOR
27( 27 mod 256): SKIPPED (no operation)
28( 28 mod 256): WRITE 0x3000 thru 0x8fff (0x6000 bytes)
29( 29 mod 256): COPY 0x19000 thru 0x20fff (0x8000 bytes) to 0x79000 thru 0x80fff
30( 30 mod 256): WRITE 0x19000 thru 0x28fff (0x10000 bytes)
31( 31 mod 256): DEDUPE 0x3a000 thru 0x3dfff (0x4000 bytes) to 0x49000 thru 0x4cfff
32( 32 mod 256): ZERO 0x8f290 thru 0x927bf (0x3530 bytes)
33( 33 mod 256): PUNCH 0x45aec thru 0x58137 (0x1264c bytes)
34( 34 mod 256): SKIPPED (no operation)
35( 35 mod 256): FALLOC 0x5b567 thru 0x613ab (0x5e44 bytes) INTERIOR
36( 36 mod 256): ZERO 0x1abc7 thru 0x1bbd6 (0x1010 bytes)
37( 37 mod 256): MAPWRITE 0x44000 thru 0x45411 (0x1412 bytes)
38( 38 mod 256): FALLOC 0x3b222 thru 0x4de57 (0x12c35 bytes) INTERIOR
39( 39 mod 256): COLLAPSE 0x1e000 thru 0x20fff (0x3000 bytes)
40( 40 mod 256): INSERT 0x62000 thru 0x64fff (0x3000 bytes)
41( 41 mod 256): DEDUPE 0xf000 thru 0x16fff (0x8000 bytes) to 0x78000 thru 0x7ffff
42( 42 mod 256): WRITE 0x4000 thru 0x12fff (0xf000 bytes)
43( 43 mod 256): COPY 0x62000 thru 0x79fff (0x18000 bytes) to 0x2000 thru 0x19fff
44( 44 mod 256): SKIPPED (no operation)
45( 45 mod 256): MAPWRITE 0x22000 thru 0x297c9 (0x77ca bytes)
46( 46 mod 256): WRITE 0x41000 thru 0x42fff (0x2000 bytes)
Log of operations saved to "/mnt/xfstests/test/ovl-mnt/junk.fsxops"; replay with --replay-ops
Correct content saved for comparison
(maybe hexdump "/mnt/xfstests/test/ovl-mnt/junk" vs "/mnt/xfstests/test/ovl-mnt/junk.fsxgood")
