linux-kernel - Qemu & KVM bug

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Date:	Wed, 13 Feb 2008 15:38:55 +0100
From:	"Zdenek Kabelac" <zdenek.kabelac@...il.com>
To:	linux-kernel@...r.kernel.org
Subject: Qemu & KVM bug

Hi

I get this bug in my log whenever I start qemu-kvm - I do not use kqemu
module - so it's with plain kernel modules.
If more details are needed - just ask.
(Cpu; C2D)

Bye

Zdenek



BUG: sleeping function called from invalid context at kernel/rwsem.c:48
in_atomic():1, irqs_disabled():0
INFO: lockdep is turned off.
Pid: 26600, comm: qemu-kvm Not tainted 2.6.25-rc1 #29

Call Trace:
 [<ffffffff81064873>] ? __debug_show_held_locks+0x23/0x30
 [<ffffffff81036765>] __might_sleep+0xe5/0x110
 [<ffffffff812f21b0>] down_write+0x20/0x70
 [<ffffffff88271a3c>] :kvm_intel:vmx_create_vcpu+0x48c/0x61c
 [<ffffffff810b5d92>] ? fd_install+0x52/0x60
 [<ffffffff8824edce>] :kvm:kvm_arch_vcpu_create+0xe/0x10
 [<ffffffff8824dca2>] :kvm:kvm_vm_ioctl+0x122/0x220
 [<ffffffff8824c770>] ? :kvm:kvm_dev_ioctl+0x80/0x1c0
 [<ffffffff810c67b1>] vfs_ioctl+0x31/0xa0
 [<ffffffff810c6aa3>] do_vfs_ioctl+0x283/0x2f0
 [<ffffffff810c6ba9>] sys_ioctl+0x99/0xa0
 [<ffffffff8100c8ae>] tracesys+0xdc/0xe1

SIPI to vcpu 1 vector 0x10
Ignoring de-assert INIT to vcpu 1
SIPI to vcpu 1 vector 0x06
SIPI to vcpu 1 vector 0x06
kvm: emulating exchange as write
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