Re: [Xen-devel] Problem starting HVM guest in Xen 4.3 RC6 when NOT using device_model_version="qemu-xen-traditional"

[Ian Murray <murrayie@xxxxxxxxxxx>]

> 
> You can also run "make tools/qemu-xen-dir-force-update" (simlarly for
> tools/qemu-xen-traditional-dir-force-update and
> tools/firmware/seabios-dir-force-update). We could really do with a rule
> which depends on all of those to force everything to be updated.
> 
> The reason we don't do this automatically is we are wary of destroying
> people's local changes/work. A local commit is one thing (you can get it
> back from the reflog) but we were more concerned about dirty trees i.e.
> losing work which hasn't been committed.
> 
> It's certainly likely that the git cloning runes here could be made
> smarter. One approach might be to stash the git tag which the build
> system checked out in a hidden file (tools/.qemu-xen-dir.sha1?) and only
> force the update if it is the same as the current head, different to the
> desired head and the tree is not dirty. It could also print bigger
> warning messages when one or more of these isn't the case.
> 
> scripts/git-checkout.sh is the place for anyone wanting to improve the
> situation here to look.

It's not a mistake I am likely to make again, but I am sure I will not be the 
last. Even a warning message that the qemus and seabios will not be brought 
up-to-date, when performing a 'make clean' might be enough IMHO.

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