Re: [Xen-tools] [BUNDLE] Change transaction semantics, implementation

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

On 21 Sep 2005, at 07:07, Rusty Russell wrote:

> Previously we used a
> lock to implement transactions, with deadlock protection by breaking 
> the
> lock after one second and returning ETIMEDOUT.  Unfortunately, the 
> store
> was so slow that we were seeing this (and treating it as a soft error,
> which makes it worse, risking livelock), and Christian pointed out that
> this model is also flawed in theory: domains can be paused for infinite
> duration.  So, transaction_end can now fail with EAGAIN at any time: 
> you
> have to loop.
This makes me very happy. :-)

 -- Keir


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