[LU-17918] protect layout in ll_delete_inode

• Type: Bug
• Resolution: Unresolved
• Priority: Major
• Severity: 3
• Assignee: Zhenyu Xu
• Reporter: Zhenyu Xu

Description

When an inode is evicted during unmounting, it would write out dirty pages, we need to protect the layout since it could be changed by mirror operations at the same time.

BUG: unable to handle kernel NULL pointer dereference at 0000000000006
IP: cl_object_top+0xe/0x130 [obdclass]
Call Trace:
    cl_io_sub_init+0x1f/0x70 [obdclass]
    lov_sub_get+0x52a/0x910 [lov]
    lov_io_iter_init+0x2da/0xab0 [lov]
    cl_io_iter_init+0x51/0x100 [obdclass]
    cl_io_loop+0x71/0x200 [obdclass]
    cl_sync_file_range+0x142/0x150 [lustre]
    cl_delete_inode+0x142/0x150 [lustre]
    evict+0xd2/0x1a0

Issue Links

• is related to: LU-17970 Add lock match flag LDLM_MATCH_SKIP_UNUSED