Re: [KVM][PATCH] smp_processor_id() and sleeping functions used in invalid context

From: Luca <kronos.it@xxxxxxxxx>
Date: Sun, 31 Dec 2006 18:58:11 +0100

On 12/31/06, Avi Kivity <avi@xxxxxxxxxxxx> wrote:

Luca Tettamanti wrote:
> Hello,
> I'm testing KVM on a Core2 CPU. I'm running kernel 2.6.20-git (pulled
> few hours ago), configured with SMP and PREEMPT.
>
> I'm hitting 2 different warnings:
> BUG: using smp_processor_id() in preemptible [00000001] code: kvm/7726
> caller is vmx_create_vcpu+0x9/0x2f [kvm_intel]

[...]
> Second one:
> BUG: sleeping function called from invalid context at
> /home/kronos/src/linux-2.6.git/mm/slab.c:3034
> in_atomic():1, irqs_disabled():0
> 1 lock held by kvm/12706:
> #0: (&vcpu->mutex){--..}, at: [<f1b68d02>] kvm_dev_ioctl+0x113/0xf97
> [kvm]
> [<b015c32a>] kmem_cache_alloc+0x1b/0x6f
>
[...]

There are patches for both (I think) flying around. They should land in
Linus' tree in a few days.

Ah, I just saw them on lkml...

Luca
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References:
- [KVM][PATCH] smp_processor_id() and sleeping functions used in invalid context
  - From: Luca Tettamanti
- Re: [KVM][PATCH] smp_processor_id() and sleeping functions used in invalid context
  - From: Avi Kivity

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