------- Comment From [email protected] 2017-08-24 14:38 EDT------- As not much info was there in the bug, I tested the kernels (mentioned in comment 57) on ubuntu 16.04 (LTS- 4.4.0-92-generic). When tried IO (Austin,hydepar EN, Shiner, Glacierpar) and CPU dlpar on both the kernel I didnt see any issue. But while removing memory (after adding the to mem to lpar), lpar dropped at xmon.
console logs =========== root@roselp2:~# [15615.010274] kernel BUG at mm/memory_hotplug.c:1908! cpu 0x2a: Vector: 700 (Program Check) at [c00000024524b780] pc: c00000000035d720: remove_memory+0x100/0x120 lr: c00000000035d6ac: remove_memory+0x8c/0x120 sp: c00000024524ba00 msr: 8000000000029033 current = 0xc0000001b2f05c00 paca = 0xc00000000fadb900 softe: 0 irq_happened: 0x01 pid = 48226, comm = drmgr kernel BUG at mm/memory_hotplug.c:1908! Linux version 4.13.0-rc5-next-20170817 (bauermann@u1604le) (gcc version 5.4.0 20160609 (Ubuntu/IBM 5.4.0-6ubuntu1~16.04.4)) #2 SMP Mon Aug 21 19:07:20 BRT 2017 enter ? for help [c00000024524ba40] c0000000000c3554 pseries_remove_memblock+0xe4/0x140 [c00000024524ba90] c0000000000c37dc pseries_memory_notifier+0x22c/0x280 [c00000024524bad0] c00000000012d1f0 notifier_call_chain+0xa0/0x110 [c00000024524bb20] c00000000012d7f8 __blocking_notifier_call_chain+0x78/0xb0 [c00000024524bb70] c000000000a304f8 of_property_notify+0x58/0xc0 [c00000024524bbb0] c000000000a2b320 of_update_property+0x110/0x150 [c00000024524bc10] c0000000000b7340 ofdt_write+0x1d0/0x6d0 [c00000024524bcd0] c00000000043db7c proc_reg_write+0x8c/0xd0 [c00000024524bd00] c000000000391938 __vfs_write+0x48/0x200 [c00000024524bd90] c0000000003936f4 vfs_write+0xd4/0x270 [c00000024524bde0] c00000000039558c SyS_write+0x6c/0x110 [c00000024524be30] c00000000000b184 system_call+0x58/0x6c --- Exception: c01 (System Call) at 00002000001ce09c SP (7fffe1582790) is in userspace 2a:mon> c cpus stopped: 0x0-0x9f 2a:mon> t [c00000024524ba40] c0000000000c3554 pseries_remove_memblock+0xe4/0x140 [c00000024524ba90] c0000000000c37dc pseries_memory_notifier+0x22c/0x280 [c00000024524bad0] c00000000012d1f0 notifier_call_chain+0xa0/0x110 [c00000024524bb20] c00000000012d7f8 __blocking_notifier_call_chain+0x78/0xb0 [c00000024524bb70] c000000000a304f8 of_property_notify+0x58/0xc0 [c00000024524bbb0] c000000000a2b320 of_update_property+0x110/0x150 [c00000024524bc10] c0000000000b7340 ofdt_write+0x1d0/0x6d0 [c00000024524bcd0] c00000000043db7c proc_reg_write+0x8c/0xd0 [c00000024524bd00] c000000000391938 __vfs_write+0x48/0x200 [c00000024524bd90] c0000000003936f4 vfs_write+0xd4/0x270 [c00000024524bde0] c00000000039558c SyS_write+0x6c/0x110 [c00000024524be30] c00000000000b184 system_call+0x58/0x6c --- Exception: c01 (System Call) at 00002000001ce09c SP (7fffe1582790) is in userspace 2a:mon> r R00 = c00000000035d6ac R16 = 0000000000000000 R01 = c00000024524ba00 R17 = 0000000000000000 R02 = c0000000015bfb00 R18 = 0000000000000000 R03 = 0000000000000001 R19 = 0000000000000000 R04 = c00000027668ade8 R20 = 0000000000000000 R05 = c0000002766a1fe8 R21 = 0000000000000000 R06 = 0000000000015f60 R22 = 0000000000000000 R07 = 0000000000000001 R23 = 00000100111ecca8 R08 = 0000000000000007 R24 = 00000100112106b0 R09 = 0000000000000002 R25 = c00000027e089810 R10 = c00000023aa97c80 R26 = 0000000000000001 R11 = 303078302d303030 R27 = 0000000010000000 R12 = 0000000000002200 R28 = 0000000000000000 R13 = c00000000fadb900 R29 = c000000001494548 R14 = 0000000000000000 R30 = 0000000001000000 R15 = 0000000000000000 R31 = 0000000280000000 pc = c00000000035d720 remove_memory+0x100/0x120 cfar= c00000000035d6b0 remove_memory+0x90/0x120 lr = c00000000035d6ac remove_memory+0x8c/0x120 msr = 8000000000029033 cr = 22002424 ctr = 0000000000000000 xer = 0000000020000000 trap = 700 2a:mon> d 0000000000000000 **************** **************** | | 2a:mon> -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1661684 Title: ISST-LTE:pVM:roselp4:ubuntu 16.04.2: drop in xmon when running dlpar tests under stress To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1661684/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
