On Thu, Feb 27, 2014 at 05:58:46PM +0100, Paolo Bonzini wrote:
> Il 27/02/2014 18:01, [email protected] ha scritto:
> >OK, so your patch works perfectly well with both of my test machines (a
> >Ubuntu guest or
> >a ChorusOS guest).
> >I join the patch, can you signof it ?
>
> I'll post it tonight or tomorrow, thanks.
I tested two cases:
1. Built a Fedora Kernel[a] and installed on both L0 and L1, booted an
L2 guest successfully[b].
- I tried two things as L2 guest: (1) Run 'libguestfs-test-tool'
that boots a minimal Kernel/initrd via 'libvirt' backend; (2) A
regular Fedora-20 guest with QEMU command-line produced by
libvirt.
2. Build KVM git with Paolo's patch, install the Kernel on L0 and L1;
(and reboot both):
$ git log | head -1
commit 404381c5839d67aa0c275ad1da96ef3d3928ca2c
In this case, booting an L1 (guest hypervisor) itself results in the
below stack trace for me:
[. . .]
[ 0.039000] task: ffff880216078000 ti: ffff880216056000 task.ti:
ffff880216056000
[ 0.039000] RIP: 0010:[<ffffffff81ceab25>] [<ffffffff81ceab25>]
intel_pmu_init+0x2d9/0x8e6
[ 0.039000] RSP: 0000:ffff880216057e40 EFLAGS: 00000202
[ 0.039000] RAX: 0000000000000003 RBX: 0000000000000000 RCX:
0000000000000345
[ 0.039000] RDX: 0000000000000003 RSI: 0000000000000730 RDI:
0000ffffffffffff
[ 0.039000] RBP: ffff880216057e48 R08: 0000000000000001 R09:
0000000000000007
[ 0.039000] R10: ffffffff81cc0c60 R11: ffff880216057c16 R12:
ffffffff81ce9a4f
[ 0.039000] R13: 0000000000000000 R14: 0000000000000000 R15:
0000000000000000
[ 0.039000] FS: 0000000000000000(0000) GS:ffff88021fc00000(0000)
knlGS:0000000000000000
[ 0.039000] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 0.039000] CR2: ffff88021ffff000 CR3: 0000000001c0b000 CR4:
00000000001406f0
[ 0.039000] Stack:
[ 0.039000] 0000000000000000 ffff880216057e98 ffffffff81ce9a88
0000000000000000
[ 0.039000] ffff88000009b000 ffff880216057e98 0000000000000000
ffffffff81ce9a4f
[ 0.039000] 0000000000000000 0000000000000000 0000000000000000
ffff880216057f08
[ 0.039000] Call Trace:
[ 0.039000] [<ffffffff81ce9a88>] init_hw_perf_events+0x39/0x51a
[ 0.039000] [<ffffffff81ce9a4f>] ? check_bugs+0x2d/0x2d
[ 0.039000] [<ffffffff81000332>] do_one_initcall+0xf2/0x140
[ 0.039000] [<ffffffff81cef22f>] ? native_smp_prepare_cpus+0x30c/0x32a
[ 0.039000] [<ffffffff81ce2f19>] kernel_init_freeable+0xc4/0x1ec
[ 0.039000] [<ffffffff817aa230>] ? rest_init+0x80/0x80
[ 0.039000] [<ffffffff817aa239>] kernel_init+0x9/0xf0
[ 0.039000] [<ffffffff817c307c>] ret_from_fork+0x7c/0xb0
[ 0.039000] [<ffffffff817aa230>] ? rest_init+0x80/0x80
[ 0.039000] Code: 61 fd ff 44 89 0d e4 61 fd ff 89 0d 9e 62 fd ff 7e 2b
83 e2 1f b8 03 00 00 00 b9 45 03 00 00 83 fa 02 0f 4f c2 89 05 ab 61 fd ff <0f>
32 48 c1 e2 20 89 c0 48 09 c2 48 89 15 49 62 fd ff e8 64 10
[ 0.039000] RIP [<ffffffff81ceab25>] intel_pmu_init+0x2d9/0x8e6
[ 0.039000] RSP <ffff880216057e40>
[ 0.039013] ---[ end trace 6a1e6dd839222f3e ]---
[ 0.040007] swapper/0 (1) used greatest stack depth: 5720 bytes left
[ 0.041008] Kernel panic - not syncing: Attempted to kill init!
exitcode=0x0000000b
Thanks Paolo, for the fix.
[a] http://koji.fedoraproject.org/koji/taskinfo?taskID=6577700
[b]
http://kashyapc.fedorapeople.org/temp/stdout-libguestfs-test-tool-in-L1-28FEB2014.txt
--
/kashyap
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