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Re: [Xen-devel] [ANNOUNCE] Xen 4.13 Development Update
- To: Tamas K Lengyel <tamas.k.lengyel@xxxxxxxxx>, Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
- Date: Wed, 29 May 2019 00:07:42 +0100
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- Delivery-date: Tue, 28 May 2019 23:07:59 +0000
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- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
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On 28/05/2019 14:44, Tamas K Lengyel wrote:
>> * Improvements to domain creation (v2)
>> - Andrew Cooper
> Hi Andrew,
> could you point me to a git branch where you have this work? I'm
> experimenting with some stuff and would like to see what your work in
> this area touches.
There is essentially nothing which isn't already in staging. Suffice it
to say that MDS got in the way of continuing that work.
The next task on the list is to make the vcpu/domain destroy paths
idempotent, then reimplement the create paths by just returning out of
the top of the call tree with an error, and having the top level call
destroy. This avoids having two different sets of destruction logic
which aren't quite identical.
With that in place, I can move the vcpu allocation loop into
domain_create() after which it will be impossible to find a domain by ID
and trip over some NULL vcpu pointers.
If you are introducing or adjusting allocation/deallocation logic,
please make the deallocation idempotent, and ideally use the deallocate
function to clean up from a failed allocate. There will be some
tree-wide refactoring at some point in the future which moves everything
into place. Until then, have at it.
~Andrew
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