[LU-6988] MDS and OST mount crashes with kernel panic

• Type: Bug
• Resolution: Duplicate
• Priority: Minor
• Affects Version/s: Lustre 2.8.0
• Severity: 3
• Assignee: WC Triage
• Reporter: Aditya Pandit (Inactive)

Description

Panic on MDS while mounting lustre.

DISKFS-fs (vdb): mounted filesystem with ordered data mode. quota=on. Opts: 
Lustre: Setting parameter lustre-MDT0000-mdtlov.lov.stripesize in log lustre-MDT0000
Lustre: ctl-lustre-MDT0000: No data found on store. Initialize space
Lustre: lustre-MDT0000: new disk, initializing
Lustre: ctl-lustre-MDT0000: super-sequence allocation rc = 0 [0x0000000200000400-0x0000000240000400):0:mdt
------------[ cut here ]------------
kernel BUG at block/blk-core.c:2627!
invalid opcode: 0000 [#1] SMP 
Pid: 6022, comm: ldiskfslazyinit Not tainted 2.6.32-431.29.2.el6_lustreb_neo_stable_6698_6 #1 Red Hat KVM
RIP: 0010:[<ffffffff812698c2>]  [<ffffffff812698c2>] __blk_end_request_all+0x32/0x60
Process ldiskfslazyinit (pid: 6022, threadinfo ffff88011bb80000, task ffff88011933f500)
Call Trace:
 <IRQ> 
 [<ffffffffa005a22a>] blk_done+0x4a/0x110 [virtio_blk]
 [<ffffffff810ecb14>] ? __rcu_process_callbacks+0x54/0x350
 [<ffffffffa004e2ac>] vring_interrupt+0x3c/0xd0 [virtio_ring]
 [<ffffffff810e7090>] handle_IRQ_event+0x60/0x170
 [<ffffffff8107a64f>] ? __do_softirq+0x11f/0x1e0
 [<ffffffff810e99ee>] handle_edge_irq+0xde/0x180
 [<ffffffff8100faf9>] handle_irq+0x49/0xa0
 [<ffffffff81532dbc>] do_IRQ+0x6c/0xf0
 [<ffffffff8100b9d3>] ret_from_intr+0x0/0x11
 <EOI> 
 [<ffffffff811222e5>] mempool_alloc_slab+0x15/0x20
 [<ffffffff81122483>] mempool_alloc+0x63/0x140
 [<ffffffff811c4ed2>] bvec_alloc_bs+0xe2/0x110
 [<ffffffff811c4fb2>] bio_alloc_bioset+0xb2/0xf0
 [<ffffffff811c5095>] bio_alloc+0x15/0x30
 [<ffffffff812705a8>] blkdev_issue_zeroout+0x88/0x180
 [<ffffffffa02b1c64>] ldiskfs_init_inode_table+0x154/0x290 [ldiskfs]
 [<ffffffffa02dbdcb>] ldiskfs_lazyinit_thread+0x15b/0x2f0 [ldiskfs]
 [<ffffffff8109abf6>] kthread+0x96/0xa0