https://bugzilla.kernel.org/show_bug.cgi?id=201453 Bug ID: 201453 Summary: Bug 1640090 - [xfstests xfs/490]: xfs_db print a bad (negative number) as agi freecount Product: File System Version: 2.5 Kernel Version: v4.18 Hardware: All OS: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: XFS Assignee: filesystem_xfs@xxxxxxxxxxxxxxxxxxxxxx Reporter: zlang@xxxxxxxxxx Regression: No Description of problem: On s390x, I hit a xfs/490 failure (can't reproduce it on x86_64). By manually debuging, I find: # mkfs.xfs -f -m finobt=0 /dev/loop1 meta-data=/dev/loop1 isize=512 agcount=4, agsize=786496 blks = sectsz=512 attr=2, projid32bit=1 = crc=1 finobt=0, sparse=1, rmapbt=0 = reflink=1 data = bsize=4096 blocks=3145984, imaxpct=25 = sunit=0 swidth=0 blks naming =version 2 bsize=4096 ascii-ci=0, ftype=1 log =internal log bsize=4096 blocks=2560, version=2 = sectsz=512 sunit=0 blks, lazy-count=1 realtime =none extsz=4096 blocks=0, rtextents=0 # mount /dev/loop1 /mnt/testarea/scratch/ # mkdir /mnt/testarea/scratch/dir # xfs_io -fc "pwrite 0 4096" -c fsync /mnt/testarea/scratch/dir/testfile wrote 4096/4096 bytes at offset 0 4 KiB, 1 ops; 0.0000 sec (150.240 MiB/sec and 38461.5385 ops/sec) # stat -c %i /mnt/testarea/scratch/dir/testfile 132 # umount /dev/loop1 # _scratch_xfs_db -c "convert inode 132 agno" 0x0 (0) # _scratch_xfs_get_metadata_field "recs[1].freecount" "agi 0" "addr root" -197 ]# xfs_db -c "agi 0" -c "addr root" -c "print recs[1]" /dev/loop1 recs[1] = [startino,holemask,count,freecount,free] 1:[128,0,64,-197,0xffffffffffffffe0] Version-Release number of selected component (if applicable): kernel 4.18 xfsprogs 4.19.0-rc0 How reproducible: 100% on s390x with loop device (at least from my testing) Steps to Reproduce: run xfs/490 on s390x Actual results: as above Expected results: test pass Additional info: I think it's not a kernel problem, the negative number maybe not real on disk. Due to the SCRATCH_DEV still can be mounted without errors: [root@ibm-z-110 xfstests]# mount /dev/loop1 /mnt/testarea/scratch [root@ibm-z-110 xfstests]# dmesg|tail [ 7289.790976] XFS (loop1): Mounting V5 Filesystem [ 7289.796601] XFS (loop1): Ending clean mount And it's not reproducible on x86_64: # xfs_db -c "agi 0" -c "addr root" -c "print recs[1]" /dev/loop1 recs[1] = [startino,holemask,count,freecount,free] 1:[128,0,64,59,0xffffffffffffffe0] -- You are receiving this mail because: You are watching the assignee of the bug.
