From: Avi Kivity <avi@redhat.com>
To: Sheng Yang <sheng@linux.intel.com>
Cc: kvm@vger.kernel.org, Marcelo Tosatti <mtosatti@redhat.com>
Subject: Re: [PATCH] KVM: Fix possible circular locking in kvm_vm_ioctl_assign_device()
Date: Mon, 14 Dec 2009 11:36:51 +0200 [thread overview]
Message-ID: <4B260733.6080203@redhat.com> (raw)
In-Reply-To: <200912141514.00291.sheng@linux.intel.com>
On 12/14/2009 09:14 AM, Sheng Yang wrote:
> On Monday 07 December 2009 16:58:04 Sheng Yang wrote:
>
>> One possible order is:
>>
>> KVM_CREATE_IRQCHIP ioctl(took kvm->lock) -> kvm_iobus_register_dev() ->
>> down_write(kvm->slots_lock).
>>
>> The other one is in kvm_vm_ioctl_assign_device(), which take
>> kvm->slots_lock first, then kvm->lock.
>>
>> Observe it due to kernel locking debug warnings.
>>
>> Signed-off-by: Sheng Yang<sheng@linux.intel.com>
>>
> Avi? Marcelo?
>
>
Sorry, hunting a regression so the tree is frozen. Will review soon.
--
error compiling committee.c: too many arguments to function
next prev parent reply other threads:[~2009-12-14 9:36 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-12-07 8:58 [PATCH] KVM: Fix possible circular locking in kvm_vm_ioctl_assign_device() Sheng Yang
2009-12-14 7:14 ` Sheng Yang
2009-12-14 9:36 ` Avi Kivity [this message]
2009-12-14 19:12 ` Marcelo Tosatti
2009-12-15 2:28 ` Sheng Yang
2009-12-15 9:35 ` Avi Kivity
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