Re: [Xen-devel] vmalloc_sync_all crash still happening on some machines

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Tue, 2011-12-20 at 16:17 +0000, Ian Jackson wrote:
> See the crash below, which happened on one of my test machines which
> still aren't in the test pool due to these kind of failures.
> 
> The bug happened immediately after localhost migration of a pv guest.
> 
> The kernel was 2.6.32.46 (as built in flight 10515).

More specifically it seems to be
6bec8b4a4c14095d0b7ce424db9d583c3decae6c from Jeremy's xen/next-2.6.32
branch.

That's actually a commit from September has the test system got stuck
testing that for some reason? There's quite a few new upstream stable
releases in Jeremy's branch. Does it relate somehow to the kernel.org
outage?

I suspect that's a red-herring though since I bet the vmalloc fixes
simply never got backported to this tree.

Ian.

> 
> Ian.
> 
> Dec 16 19:02:13.085286 [  391.370426] ------------[ cut here ]------------^M
> Dec 16 19:02:13.097267 [  391.370440] kernel BUG at arch/x86/mm/fault.c:210!^M
> Dec 16 19:02:13.097303 [  391.370460] invalid opcode: 0000 [#1] SMP ^M
> Dec 16 19:02:13.109253 [  391.370491] last sysfs file: 
> /sys/devices/vif-9-0/uevent^M
> Dec 16 19:02:13.109291 [  391.370503] Modules linked in: e1000e [last 
> unloaded: scsi_wait_scan]^M
> Dec 16 19:02:13.117292 [  391.370575] ^M
> Dec 16 19:02:13.117330 [  391.370597] Pid: 40, comm: xenwatch Not tainted 
> (2.6.32.46 #1) X9SCL/X9SCM^M
> Dec 16 19:02:13.129252 [  391.370613] EIP: 0061:[<c104a052>] EFLAGS: 00010082 
> CPU: 5^M
> Dec 16 19:02:13.129289 [  391.370633] EIP is at vmalloc_sync_one+0x112/0x121^M
> Dec 16 19:02:13.137260 [  391.370646] EAX: 000050a0 EBX: c1810fd0 ECX: 
> fffff2e3 EDX: 00000000^M
> Dec 16 19:02:13.149240 [  391.370661] ESI: ffffffe0 EDI: d9248fff EBP: 
> dfda7ea8 ESP: dfda7e94^M
> Dec 16 19:02:13.149279 [  391.370677]  DS: 007b ES: 007b FS: 00d8 GS: 0000 
> SS: 0069^M
> Dec 16 19:02:13.157316 [  391.370690] Process xenwatch (pid: 40, ti=dfda6000 
> task=dfce3cc0 task.ti=dfda6000)^M
> Dec 16 19:02:13.169240 [  391.370705] Stack:^M
> Dec 16 19:02:13.169267 [  391.370716]  00285067 00000000 c5c68640 ff400000 
> c1810fc8 dfda7ec4 c104aa52 c1760204^M
> Dec 16 19:02:13.177285 [  391.370783] <0> c4be6f84 d7411320 df68bb40 dbc2b600 
> dfda7ed0 c10da2f9 fffffff4 dfda7f28^M
> Dec 16 19:02:13.177352 [  391.370858] <0> c122c1f3 0000032a 00000300 df68bb40 
> 0200006b dce9d3a8 400002c0 c102c23b^M
> Dec 16 19:02:13.189265 [  391.370940] Call Trace:^M
> Dec 16 19:02:13.189298 [  391.370960]  [<c104aa52>] ? 
> vmalloc_sync_all+0x5f/0xc1^M
> Dec 16 19:02:13.197260 [  391.370982]  [<c10da2f9>] ? 
> alloc_vm_area+0x44/0x4b^M
> Dec 16 19:02:13.197296 [  391.371004]  [<c122c1f3>] ? netif_map+0x45/0x24d^M
> Dec 16 19:02:13.209317 [  391.371033]  [<c102c23b>] ? 
> xen_restore_fl_direct_end+0x0/0x1^M
> Dec 16 19:02:13.209352 [  391.371065]  [<c10e40b8>] ? kfree+0xff/0x107^M
> Dec 16 19:02:13.217261 [  391.371097]  [<c121e974>] ? xenbus_scanf+0x35/0x48^M
> Dec 16 19:02:13.217297 [  391.371118]  [<c122b8b8>] ? 
> frontend_changed+0x2a2/0x4f0^M
> Dec 16 19:02:13.229254 [  391.371137]  [<c121f331>] ? 
> xenbus_otherend_changed+0x5c/0x61^M
> Dec 16 19:02:13.237246 [  391.371158]  [<c121f6ff>] ? 
> frontend_changed+0xa/0xd^M
> Dec 16 19:02:13.237283 [  391.371178]  [<c121e00c>] ? 
> xenwatch_thread+0xfe/0x126^M
> Dec 16 19:02:13.245274 [  391.371199]  [<c1076589>] ? 
> autoremove_wake_function+0x0/0x2f^M
> Dec 16 19:02:13.245317 [  391.371223]  [<c121df0e>] ? 
> xenwatch_thread+0x0/0x126^M
> Dec 16 19:02:13.257249 [  391.371244]  [<c107626f>] ? kthread+0x5f/0x64^M
> Dec 16 19:02:13.257283 [  391.371261]  [<c1076210>] ? kthread+0x0/0x64^M
> Dec 16 19:02:13.265277 [  391.371283]  [<c102f497>] ? 
> kernel_thread_helper+0x7/0x10^M
> Dec 16 19:02:13.265318 [  391.371297] Code: eb fe ff 15 08 dd 66 c1 8b 7d ec 
> 89 ce 89 45 ec 8b 45 ec 89 55 f0 8b 55 f0 0f ac fe 0c c1 e6 05 0f ac d0 0c c1 
> e0 05 39 c6 74 06 <0f> 0b eb fe 31 db 5a 89 d8 59 5b 5e 5f 5d c3 55 89 e5 53 
> 89 c3 ^M
> Dec 16 19:02:13.285270 [  391.371792] EIP: [<c104a052>] 
> vmalloc_sync_one+0x112/0x121 SS:ESP 0069:dfda7e94^M
> Dec 16 19:02:13.293255 [  391.371833] ---[ end trace 27f82c4d856810c0 ]---^M
> 
> 10520/test-amd64-i386-xl
> 
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