[LU-3629] vvp_env_session() ASSERTION( ses != ((void *)0) )

• Type: Bug
• Resolution: Cannot Reproduce
• Priority: Major
• Affects Version/s: Lustre 2.4.0
• Labels: llnl
• Environment: Lustre 2.4.0-RC1_3chaos, PPC64 lustre client
• Severity: 3
• Assignee: Niu Yawei (Inactive)
• Reporter: Christopher Morrone (Inactive)

Description

A few weeks ago we had a login node (Lustre client) die in the following assertion:

(llite_internal.h:1064:vvp_env_session()) ASSERTION( ses != ((void *)0) )

It was running Lustre 2.4.0-RC1_3chaos

The backtrace from crash looks like:

crash> bt
PID: 10792  TASK: c000000ef9de7da0  CPU: 28  COMMAND: "slurm_prolog"
 #0 [c000000bc3706720] .crash_kexec at c0000000000e5aa4
 #1 [c000000bc3706920] .panic at c0000000005c4f40
 #2 [c000000bc37069b0] .lbug_with_loc at d00000000aa714e0 [libcfs]
 #3 [c000000bc3706a40] .vvp_io_init at d00000000c6cc03c [lustre]
 #4 [c000000bc3706b20] .cl_io_init0 at d00000000b808024 [obdclass]
 #5 [c000000bc3706bd0] .cl_pages_prune at d00000000b7fbc18 [obdclass]
 #6 [c000000bc3706c80] .cl_object_prune at d00000000b7f1f00 [obdclass]
 #7 [c000000bc3706d30] .lov_delete_raid0 at d00000000c1fa8a4 [lov]
 #8 [c000000bc3706e50] .lov_object_delete at d00000000c1f9240 [lov]
 #9 [c000000bc3706f00] .lu_object_free at d00000000b7e3520 [obdclass]
#10 [c000000bc3706fe0] .lu_object_put at d00000000b7e7360 [obdclass]
#11 [c000000bc37070b0] .cl_object_put at d00000000b7f2c90 [obdclass]
#12 [c000000bc3707120] .cl_inode_fini at d00000000c6bfd68 [lustre]
#13 [c000000bc3707230] .ll_clear_inode at d00000000c677264 [lustre]
#14 [c000000bc3707310] .clear_inode at c0000000001e1cc8
#15 [c000000bc37073a0] .dispose_list at c0000000001e2068
#16 [c000000bc3707450] .shrink_icache_memory at c0000000001e24c4
#17 [c000000bc3707540] .shrink_slab at c00000000016ecbc
#18 [c000000bc3707600] .do_try_to_free_pages at c0000000001716b0
#19 [c000000bc3707720] .try_to_free_pages at c000000000171a88
#20 [c000000bc3707820] .__alloc_pages_nodemask at c0000000001668c0
#21 [c000000bc37079c0] .alloc_pages_vma at c0000000001a2694
#22 [c000000bc3707a70] .handle_pte_fault at c00000000017fec4
#23 [c000000bc3707b80] .do_page_fault at c0000000005c14b0
#24 [c000000bc3707e30] handle_page_fault at c00000000000520c
 Data Access error  [301] exception frame:
 R0:  0000000000000000    R1:  00000fffffffd9c0    R2:  0000040000323268   
 R3:  0000040000320878    R4:  000000000000001d    R5:  00000fffffffdebe   
 R6:  0000000000000000    R7:  00000400003210c8    R8:  0000000000000218   
 R9:  0000000010320000    R10: 0000000000000031    R11: 0000000000020001   
 R12: 0000000028002482    R13: 000004000004f040   
 NIP: 00000400001f3ad4    MSR: 800000000000d032    OR3: 0000000010340000
 CTR: 0000000000000000    LR:  00000400001f494c    XER: 0000000000000010
 CCR: 0000000028002482    MQ:  0000000000000001    DAR: 0000000010320008
 DSISR: 0000000042000000     Syscall Result: 0000000000000000

This was a PPC64 login node.