[LU-9410] on-disk bitmap corrupted

• Type: Bug
• Resolution: Fixed
• Priority: Critical
• Fix Version/s: Lustre 2.10.1, Lustre 2.11.0
• Affects Version/s: Lustre 2.7.0
• Severity: 3
• Assignee: nasf (Inactive)
• Reporter: Mahmoud Hanafi

Description

We had 2 OSS and 3 different OST crash with bitmap corrupted messages.

Apr  3 18:38:16 nbp1-oss6 kernel: LDISKFS-fs error (device dm-42): ldiskfs_mb_check_ondisk_bitmap: on-disk bitmap for group 245659corrupted: 32768 blocks free in bitmap, 0 - in gd
Apr  3 18:38:16 nbp1-oss6 kernel: 
Apr  3 18:38:16 nbp1-oss6 kernel: Aborting journal on device dm-3.
Apr  3 18:38:16 nbp1-oss6 kernel: LDISKFS-fs (dm-42): Remounting filesystem read-only
Apr  3 18:38:16 nbp1-oss6 kernel: LDISKFS-fs error (device dm-42): ldiskfs_mb_check_ondisk_bitmap: on-disk bitmap for group 245660corrupted: 32768 blocks free in bitmap, 0 - in gd

These errors were on 2 different backend RAID devices. Note worthy  items:
1 .The filesystem was +90% full and 1/2 of the data was deleted.
2. OSTs are formatted with " -E packed_meta_blocks=1 "

Issue Links

• duplicates: LU-1026 ldiskfs_mb_check_ondisk_bitmap: on-disk bitmap for group 23828 corrupted
• duplicates: LU-7114 ldiskfs: corrupted bitmaps handling patches
• is related to: LU-10837 no bitmap check if block bitmap is uninitialized