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Re: [Xen-devel] Stubdom breakage in 4.5

> -----Original Message-----
> From: Wei Liu [mailto:wei.liu2@xxxxxxxxxx]
> Sent: 03 February 2015 12:22
> To: xen-devel@xxxxxxxxxxxxx
> Cc: Wei Liu; Ian Campbell; Ian Jackson; Paul Durrant; Jan Beulich; Andrew
> Cooper; Stefano Stabellini
> Subject: Stubdom breakage in 4.5
> Hi all
> I recently found out that stubdom in 4.5 is broken.
> A proper fix to that issue is likely to alter the start up protocol,
> which is not acceptable for backport.
> Providing a backport that doesn't alter the protocol used to start up
> stubdom is difficult.
> Paul, do you have any insight how we can fix stubdom in 4.5? Even a
> backportable workaround is better than just have stubdom broken.

The minimal fix from your PoV, I guess, would be something that tells Xen not 
to complete I/O in the absence of a matching IOREQ but to wait until one is 
there, IIUC? It's a bit icky, and I don't know what form that something would 
be in.

> Wei.

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