Hi, ltp/access04 always panic the latest mainstream kernel-4.12-rc4 on ppc64le. From the calltrace I guess the reason is probably that the tests mount ext2 file system using ext4 driver. A simple way to reproduce: # dd of=wangli if=/dev/zero count=1024 bs=1024 # mkfs -t ext2 wangli # mount -t ext4 wangli /mnt/ Are there any new changes in ext4 (on kernel-4.12-rc4) recently? [ 318.557844] EXT4-fs (loop0): mounting ext2 file system using the ext4 subsystem [ 318.558104] Unable to handle kernel paging request for unaligned access at address 0xc0000001c52c53df [ 318.558109] Faulting instruction address: 0xc000000000918b28 [ 318.558114] Oops: Kernel access of bad area, sig: 7 [#1] [ 318.558117] SMP NR_CPUS=2048 [ 318.558117] NUMA [ 318.558120] pSeries [ 318.558124] Modules linked in: ext4 jbd2 mbcache loop rpcsec_gss_krb5 nfsv4 dns_resolver nfs fscache sg pseries_rng nfsd auth_rpcgss nfs_acl lockd ghash_generic gf128mul xts vmx_crypto grace sunrpc ip_tables xfs libcrc32c sd_mod ibmvscsi ibmveth scsi_transport_srp dm_mirror dm_region_hash dm_log dm_mod [ 318.558152] CPU: 2 PID: 40748 Comm: access04 Not tainted 4.12.0-rc4 #1 [ 318.558155] task: c0000003889fb200 task.stack: c0000003ac134000 [ 318.558158] NIP: c000000000918b28 LR: c00000000011c5d4 CTR: c000000000130900 [ 318.558162] REGS: c0000003ac137420 TRAP: 0600 Not tainted (4.12.0-rc4) [ 318.558164] MSR: 800000010280b033 <SF,VEC,VSX,EE,FP,ME,IR,DR,RI,LE,TM[E]> [ 318.558171] CR: 28028842 XER: 00000000 [ 318.558174] CFAR: c00000000011c5d0 DAR: c0000001c52c53df DSISR: 00000000 SOFTE: 0 [ 318.558174] GPR00: c00000000011c5d4 c0000003ac1376a0 c000000001049000 c0000001c52c53df [ 318.558174] GPR04: c0000004788657f0 0000000000000000 0000000000000000 0000000000000001 [ 318.558174] GPR08: 0000000477be0000 0000000000000000 0000000080000002 0000000000000000 [ 318.558174] GPR12: c000000000130900 c00000000fac1500 0000000000000000 c0000004648b6800 [ 318.558174] GPR16: 0000000000000000 c000000408ad0400 0000000000000000 0000000000040001 [ 318.558174] GPR20: 0000000000000001 0000000000000000 0000000000004000 c000000000cc5780 [ 318.558174] GPR24: 00000001c45ffc5f 0000000000000000 c000000000cc5780 c0000001c52c53df [ 318.558174] GPR28: c000000009d06034 0000000000000004 0000000000000800 c0000001c52c53df [ 318.558222] NIP [c000000000918b28] _raw_spin_lock+0x28/0xc0 [ 318.558226] LR [c00000000011c5d4] try_to_wake_up+0x1f4/0x5b0 [ 318.558229] Call Trace: [ 318.558231] [c0000003ac1376a0] [c000000009d06034] 0xc000000009d06034 (unreliable) [ 318.558236] [c0000003ac1376d0] [c00000000011c5d4] try_to_wake_up+0x1f4/0x5b0 [ 318.558241] [c0000003ac137750] [c000000000102828] create_worker+0x148/0x250 [ 318.558245] [c0000003ac1377f0] [c0000000001059dc] alloc_unbound_pwq+0x3bc/0x4c0 [ 318.558249] [c0000003ac137850] [c00000000010601c] apply_wqattrs_prepare+0x2ac/0x320 [ 318.558253] [c0000003ac1378c0] [c0000000001060cc] apply_workqueue_attrs_locked+0x3c/0xa0 [ 318.558257] [c0000003ac1378f0] [c00000000010662c] apply_workqueue_attrs+0x4c/0x80 [ 318.558261] [c0000003ac137930] [c0000000001081cc] __alloc_workqueue_key+0x16c/0x4e0 [ 318.558280] [c0000003ac1379f0] [d000000008455ca0] ext4_fill_super+0x1c70/0x3390 [ext4] [ 318.558286] [c0000003ac137b30] [c000000000316bdc] mount_bdev+0x21c/0x250 [ 318.558298] [c0000003ac137bd0] [d00000000844db20] ext4_mount+0x20/0x40 [ext4] [ 318.558303] [c0000003ac137bf0] [c000000000318184] mount_fs+0x74/0x210 [ 318.558307] [c0000003ac137ca0] [c00000000033fd18] vfs_kern_mount+0x68/0x1d0 [ 318.558310] [c0000003ac137d10] [c000000000344a28] do_mount+0x278/0xef0 [ 318.558314] [c0000003ac137de0] [c000000000345ac4] SyS_mount+0x94/0x100 [ 318.558319] [c0000003ac137e30] [c00000000000af84] system_call+0x38/0xe0 [ 318.558322] Instruction dump: [ 318.558324] 990d02bc 4bffffc8 3c4c0073 38420500 7c0802a6 fbe1fff8 7c7f1b78 f8010010 [ 318.558329] f821ffd1 39400000 994d02bc 814d0008 <7d201829> 2c090000 40c20010 7d40192d [ 318.558336] ---[ end trace a2b72248c6bfebea ]--- More info of test environment ------------------------------------------ # uname -rm 4.12.0-rc4 ppc64le # lscpu Architecture: ppc64le Byte Order: Little Endian CPU(s): 16 On-line CPU(s) list: 0-15 Thread(s) per core: 8 Core(s) per socket: 1 Socket(s): 2 NUMA node(s): 2 Model: 2.1 (pvr 004b 0201) Model name: POWER8 (architected), altivec supported Hypervisor vendor: pHyp Virtualization type: para L1d cache: 64K L1i cache: 32K NUMA node0 CPU(s): 0-15 NUMA node1 CPU(s): -- Li Wang liwang@xxxxxxxxxx
