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Re: [Xen-devel] Xen 4.12 Development Update
- To: Juergen Gross <jgross@xxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
- Date: Fri, 9 Nov 2018 12:05:21 +0000
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- Delivery-date: Fri, 09 Nov 2018 12:05:26 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
- Openpgp: preference=signencrypt
On 09/11/18 11:44, Andrew Cooper wrote:
> On 09/11/18 10:16, Juergen Gross wrote:
>> = Projects =
>>
>> == Hypervisor ==
>>
>> * Improvements to domain creation (v2)
>> - Andrew Cooper
> There is one known bug which definitely needs resolving before 4.12 goes
> out. Attempting to create a VM with 0 vcpus trips over a bad error path
> when we try to remove permissions for an irq which we never gave in the
> first place. The fix is most likely to not change irq permissions on unmap.
>
> Beyond that, the next actions are to make the create/destroy paths
> idempotent. If anyone feels like helping out here, please do.
>
> After that, DOMCTL_max_vcpus needs to be folded into the create path.
>
> An orthogonal task, which really also needs doing before 4.12 goes out
> is to rearrange the point at which d->max_cpus is calculated, so ARM
> gets this number early enough in construction to properly build the
> GIC. (At the moment, there is a bait-and-switch to defer GIC
> construction until the first vcpu is being constructed).
Oh - another one I forgot.
* Improvements to domain_crash()
The purpose of this is to fix a livepatching bug, but it has the side
effect of fixing the fact that in release builds, most domain_crash()'s
have no clarifying information as to what went wrong.
I've posted about half the work. What remains in the monolithic patch
to change domain_crash()'s API to make it printk-like.
~Andrew
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