Re: [Qemu-devel] [PATCH v7 08/10] block: Add checks of blocker in block operations

[Markus Armbruster]

Fam Zheng <address@hidden> writes:

> Before operate on a BlockDriverState, respective types are checked
> against bs->op_blockers and it will error out if there's a blocker.
>
> Signed-off-by: Fam Zheng <address@hidden>

So this patch adds protection against "two of the same kind
simultaneously".  How could we check it's complete?

Have we pondered the more general problem of which "operations"
(whatever that is) exclude each other?

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