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X-MS-Exchange-CrossTenant-Id: 4e2c6054-71cb-48f1-bd6c-3a9705aca71b X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: HT9Nv4veGlvQDczAgHcgrp36c1IU91qlxa1nTUCdbvk4JS8376wbAcDpV3PF7MoUwh8ax0IrLdiHySYgyVnHaQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: SN7PR10MB7074 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.1011,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2024-03-06_14,2024-03-06_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 mlxlogscore=999 bulkscore=0 mlxscore=0 spamscore=0 phishscore=0 suspectscore=0 malwarescore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2311290000 definitions=main-2403070027 X-Proofpoint-GUID: SACGy2AXGcuWAdAV6R61g25valPBsYvO X-Proofpoint-ORIG-GUID: SACGy2AXGcuWAdAV6R61g25valPBsYvO The problem has been highly inconsistent to reproduce. I apologize for the delay in sending out the fix. > $ ./check btrfs/14[6-9] btrfs/15[8-9] > FSTYP -- btrfs > PLATFORM -- Linux/x86_64 debian0 6.8.0-rc5-btrfs-next-151+ #1 SMP > PREEMPT_DYNAMIC Mon Feb 19 13:38:37 WET 2024 > MKFS_OPTIONS -- /dev/sdc > MOUNT_OPTIONS -- /dev/sdc /home/fdmanana/btrfs-tests/scratch_1 > > btrfs/146 1s ... 2s > btrfs/147 0s ... 1s > btrfs/148 2s ... 2s > btrfs/149 1s ... 1s > btrfs/158 1s ... 0s > btrfs/159 20s ... - output mismatch (see > /home/fdmanana/git/hub/xfstests/results//btrfs/159.out.bad) > --- tests/btrfs/159.out 2020-10-26 15:31:57.061207266 +0000 > +++ /home/fdmanana/git/hub/xfstests/results//btrfs/159.out.bad > 2024-02-20 13:51:25.707220763 +0000 > @@ -1,8 +1,11 @@ > QA output created by 159 > +mount: /home/fdmanana/btrfs-tests/scratch_1: wrong fs type, bad > option, bad superblock on /dev/mapper/flakey-test, missing codepage or > helper program, or other error. > + dmesg(1) may have more information after failed mount system call. > File digest before power failure: > -f049865ed45b1991dc9a299b47d51dbf SCRATCH_MNT/foobar > +b2e8facfb4795185fadd85707fe78973 SCRATCH_MNT/foobar > +umount: /home/fdmanana/btrfs-tests/scratch_1: not mounted. > ... > (Run 'diff -u /home/fdmanana/git/hub/xfstests/tests/btrfs/159.out > /home/fdmanana/git/hub/xfstests/results//btrfs/159.out.bad' to see > the entire diff) > Ran: btrfs/146 btrfs/147 btrfs/148 btrfs/149 btrfs/158 btrfs/159 > btrfs/159 does _scratch_mkfs -O no-holes -n $((64 * 1024)) >>$seqres.full 2>&1 _require_metadata_journaling $SCRATCH_DEV _init_flakey _mount_flakey > [79195.612719] BTRFS: device fsid 10184d7d-3ca9-43c1-a6f8-70b134cff828 > devid 1 transid 6 /dev/sdc scanned by mkfs.btrfs (3413318) > [79195.666279] BTRFS: device fsid 10184d7d-3ca9-43c1-a6f8-70b134cff828 > devid 1 transid 6 /dev/dm-0 scanned by systemd-udevd (3410982) Both /dev/sdc and /dev/dm-0 get scanned, and the tempfsid gets activated wrongly. The fix is to add another criterion to check if the device is already mounted; then only let the thread update the device path. However, I'm not sure if it will fix the original problem (update-grub). I have sent an RFC patch v3 for verification. Thanks, Anand > [79195.695774] BTRFS info (device dm-0): first mount of filesystem > 10184d7d-3ca9-43c1-a6f8-70b134cff828 > [79195.695786] BTRFS info (device dm-0): using crc32c (crc32c-intel) > checksum algorithm > [79195.695789] BTRFS error (device dm-0): superblock fsid doesn't > match fsid of fs_devices: 10184d7d-3ca9-43c1-a6f8-70b134cff828 != > 628aff33-4122-4d77-b2a9-2e9a90f27520 > [79195.696098] BTRFS error (device dm-0): superblock metadata_uuid > doesn't match metadata uuid of fs_devices: > 10184d7d-3ca9-43c1-a6f8-70b134cff828 != > 628aff33-4122-4d77-b2a9-2e9a90f27520 > [79195.696419] BTRFS error (device dm-0): dev_item UUID does not match > metadata fsid: 628aff33-4122-4d77-b2a9-2e9a90f27520 != > 10184d7d-3ca9-43c1-a6f8-70b134cff828 > [79195.696765] BTRFS error (device dm-0): superblock contains fatal errors > [79195.697447] BTRFS error (device dm-0): open_ctree failed > > It always happens with this patch applied in for-next, and never > happens with it reverted. > >>