[LU-5048] kernel/ext4 patch (ext4-mballoc-extra-checks.patch) is incomplete for latest SLES distros, and causes OSTs to be put in read-only mode due to wrong inconsistencies detected

• Type: Bug
• Resolution: Fixed
• Priority: Critical
• Fix Version/s: Lustre 2.6.0, Lustre 2.5.2
• Environment: SLES11SP2, SLES11SP3
• Severity: 3
• Assignee: Bruno Faccini (Inactive)
• Reporter: Bruno Faccini (Inactive)

Description

It has been discovered that an incomplete kernel/ext4 patch (ext4-mballoc-extra-checks.patch) has been provided for latest SLES distros, and causes OSTs to be put in read-only mode due to wrong inconsistencies detected like following :

May 7 17:45:59 fsl2-oss1 kernel: [109553.943182] LDISKFS-fs error (device sde): ldiskfs_mb_generate_from_pa:3526: comm ll_ost_io03_013: lost preallocations: count 1, bb_prealloc_nr 2, skip 0
May 7 17:45:59 fsl2-oss1 kernel: [109553.943352] Aborting Journal on device sde-8.
May 7 17:45:59 fsl2-oss1 kernel: [109553.943460 LDISKFS-fs (sde): Remounting filesystem read-only