Comment 26 for bug 1350522

I'm running ubuntu 14.04 on Jiffybox, a German ec2 alternative. Due to an unrelated problem with the 3.13 kernel (see https://www.df.eu/forum/threads/72787-CONFIG_FHANDLE-Support-im-Jiffy-Kernel?highlight=kernel if curious), it is not possible to use the stock kernel: it will not boot. After installing the kernel from http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.16-utopic/ the system successfully boots, which is a great improvement on the earlier state. However, it is not able to insert any modules and gives the same error messages as quoted above.

More info:

root@localhost:~# dmesg | grep "Xen version"
[ 0.000000] Xen version: 3.1.2-308.8.2.el5 (preserve-AD)

sample error message from dmesg:

[ 4.244198] ------------[ cut here ]------------
[ 4.244213] WARNING: CPU: 0 PID: 404 at /home/apw/COD/linux/mm/vmalloc.c:128 vmap_pte_range+0x13d/0x170()
[ 4.244215] Modules linked in:
[ 4.244220] CPU: 0 PID: 404 Comm: systemd-udevd Tainted: G W 3.16.0-031600-generic #201408031935
[ 4.244222] 0000000000000080 ffff8800f3f8fb38 ffffffff81786525 000000000000546e
[ 4.244225] 0000000000000000 ffff8800f3f8fb78 ffffffff8107207c ffffffff81005719
[ 4.244228] ffff8800057417a0 ffffffffc00f4000 ffff8800f3f8fc94 0000000000000163
[ 4.244230] Call Trace:
[ 4.244235] [<ffffffff81786525>] dump_stack+0x46/0x58
[ 4.244238] [<ffffffff8107207c>] warn_slowpath_common+0x8c/0xc0
[ 4.244242] [<ffffffff81005719>] ? __raw_callee_save_xen_pmd_val+0x11/0x1e
[ 4.244250] [<ffffffff810720ca>] warn_slowpath_null+0x1a/0x20
[ 4.244255] [<ffffffff811a8dfd>] vmap_pte_range+0x13d/0x170
[ 4.244259] [<ffffffff8100a9be>] ? xen_pud_val+0xe/0x10
[ 4.244262] [<ffffffff811a8f52>] vmap_pud_range+0x122/0x1c0
[ 4.244266] [<ffffffff811a9086>] vmap_page_range_noflush+0x96/0xc0
[ 4.244269] [<ffffffff811a90e1>] map_vm_area+0x31/0x50
[ 4.244272] [<ffffffff811aa180>] __vmalloc_area_node+0x130/0x1e0
[ 4.244275] [<ffffffff811a9e06>] __vmalloc_node_range+0x86/0xd0
[ 4.244278] [<ffffffff810f41fd>] ? module_alloc_update_bounds+0x1d/0x80
[ 4.244282] [<ffffffff810f41fd>] ? module_alloc_update_bounds+0x1d/0x80
[ 4.244286] [<ffffffff81055454>] module_alloc+0x74/0xd0
[ 4.244289] [<ffffffff810f41fd>] ? module_alloc_update_bounds+0x1d/0x80
[ 4.244291] [<ffffffff810f41fd>] module_alloc_update_bounds+0x1d/0x80
[ 4.244294] [<ffffffff810f4287>] move_module+0x27/0x1c0
[ 4.244297] [<ffffffff810f44d6>] layout_and_allocate+0xa6/0xd0
[ 4.244299] [<ffffffff810f46fa>] load_module+0x12a/0x5f0
[ 4.244302] [<ffffffff810f4d6e>] SyS_finit_module+0xae/0xd0
[ 4.244306] [<ffffffff81793fad>] system_call_fastpath+0x1a/0x1f
[ 4.244308] ---[ end trace e313b695aad8c05b ]---

root@localhost:~# lsmod
Module Size Used by

root@localhost:~# free -m
             total used free shared buffers cached
Mem: 3998 483 3515 0 16 393
-/+ buffers/cache: 73 3925
Swap: 511 0 511

obviously, I would be grateful for any hints on how to proceed!