I have a Netra T1-105 (OBP is latest that was released, 3.10.27 ME) with Linux (debian unstable snapshot from July 2015) running latest devel kernels and I have not seen it rebooting without hang yet (4.1, 4.2, 4.3-rc5 tested so far). [ OK ] Reached target Shutdown. [ 133.113329] NMI watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [systemd:1] [ 133.207178] Modules linked in: pata_cmd64x qla1280 libata flash autofs4 [ 133.294191] CPU: 0 PID: 1 Comm: systemd Not tainted 4.3.0-rc5-00061-ged4bf24 #5 [ 133.390274] task: fffff80037080000 ti: fffff8003706c000 task.ti: fffff8003706c000 [ 133.488744] TSTATE: 0000000011001604 TPC: 0000000000672bec TNPC: 0000000000672bf0 Y: e3f8ab00 Not tainted [ 133.618117] TPC: <misc_open+0x4c/0x180> [ 133.668519] g0: 0000000000000000 g1: 0000000000000098 g2: fffff80037696428 g3: fffff800374055d0 [ 133.782906] g4: fffff80037080000 g5: 0000000000000078 g6: fffff8003706c000 g7: 0000000000000001 [ 133.897388] o0: 0000000000949818 o1: fffff8003706fa7c o2: fffff80037405580 o3: 0000000000000003 [ 134.011871] o4: fffff80036813c80 o5: fffff80036813c88 sp: fffff8003706f111 ret_pc: 0000000000672bb8 [ 134.130931] RPC: <misc_open+0x18/0x180> [ 134.181355] l0: 0000000000949800 l1: 0000000000000000 l2: 000000000050e8e0 l3: 0000000000001000 [ 134.295740] l4: 00000000ffa83760 l5: 00000000ffffffff l6: 0000000000000000 l7: 0000000070139d38 [ 134.410224] i0: fffff800373bf850 i1: fffff8003611a380 i2: 0000000000949800 i3: 0000000000949830 [ 134.524706] i4: 0000000000000082 i5: 000000001000e770 i6: fffff8003706f1c1 i7: 000000000050f248 [ 134.639248] I7: <chrdev_open+0x88/0x120> [ 134.690767] Call Trace: [ 134.722904] [000000000050f248] chrdev_open+0x88/0x120 [ 134.790498] [000000000050909c] do_dentry_open.isra.17+0x1dc/0x340 [ 134.871818] [0000000000517d28] path_openat+0x3a8/0x1060 [ 134.941684] [0000000000519a84] do_filp_open+0x44/0xc0 [ 135.009271] [000000000050a3f0] do_sys_open+0x130/0x240 [ 135.078015] [0000000000406094] linux_sparc_syscall32+0x34/0x60 This is what I see on reboot (halt works fine and drops to OF prompt). Probably related: running prtfconf puts the system into a soft lockup - answers to ping but no ssh any more. openprom module is built into the kernel. On hang, I get the same kind of backtrace from watchdog but from different offset in misc_open: [ 115.074318] NMI watchdog: BUG: soft lockup - CPU#0 stuck for 23s! [prtconf:1518] [ 115.171649] Modules linked in: pata_cmd64x qla1280 libata flash autofs4 [ 115.258664] CPU: 0 PID: 1518 Comm: prtconf Not tainted 4.3.0-rc5-00061-ged4bf24 #5 [ 115.358178] task: fffff800372c91a0 ti: fffff800361a4000 task.ti: fffff800361a4000 [ 115.456648] TSTATE: 0000000011001606 TPC: 0000000000672bdc TNPC: 0000000000672be0 Y: 0eb75db5 Not tainted [ 115.586021] TPC: <misc_open+0x3c/0x180> [ 115.636426] g0: 0000000000000000 g1: 000000001000e788 g2: fffff8003769a428 g3: fffff800374055d0 [ 115.750811] g4: fffff800372c91a0 g5: 0000000000000018 g6: fffff800361a4000 g7: 0000000000000001 [ 115.865294] o0: 0000000000949818 o1: fffff800361a7a7c o2: fffff80037405580 o3: 0000000000000003 [ 115.979777] o4: fffff80036813c80 o5: fffff80036813c88 sp: fffff800361a7111 ret_pc: 0000000000672bb8 [ 116.098837] RPC: <misc_open+0x18/0x180> [ 116.149261] l0: 0000000000949800 l1: 0000000000000000 l2: 000000000050e8e0 l3: 0000000000001000 [ 116.263644] l4: 0000000000001818 l5: fffff80000001818 l6: 0000000000991400 l7: fffff80036121818 [ 116.378165] i0: fffff800373bf3f0 i1: fffff80031bff960 i2: 0000000000949800 i3: 0000000000949830 [ 116.492639] i4: 000000000000008b i5: 000000001000e770 i6: fffff800361a71c1 i7: 000000000050f248 [ 116.607142] I7: <chrdev_open+0x88/0x120> [ 116.658674] Call Trace: [ 116.690810] [000000000050f248] chrdev_open+0x88/0x120 [ 116.758405] [000000000050909c] do_dentry_open.isra.17+0x1dc/0x340 [ 116.839722] [0000000000517d28] path_openat+0x3a8/0x1060 [ 116.909591] [0000000000519a84] do_filp_open+0x44/0xc0 [ 116.977177] [000000000050a3f0] do_sys_open+0x130/0x240 [ 117.045922] [0000000000406094] linux_sparc_syscall32+0x34/0x60 Setting CONFIG_SUN_OPENPROMIO=M breaks prtconf as expected (Cannot open /dev/openprom) but does not cure the reboot problem. How do I debug this further? -- Meelis Roos (mroos@xxxxxxxx) -- To unsubscribe from this list: send the line "unsubscribe sparclinux" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
