[Xen-devel] Re: [PATCH v3] libvchan: interdomain communications library

[Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>]

Daniel De Graaf writes ("Re: [PATCH v3] libvchan: interdomain communications 
library"):
> Making this change has exposed an interesting ordering dependency in the
> notify API under Linux: the file descriptor for gntdev or gntalloc must be
> less than the file descriptor for evtchn in order for the event channel to
> still be active when the unmap occurs on a crash. The init functions of
> libvchan do open the files in the proper order for this to happen.

Wow, that's pretty crazy.  Surely the gnt* fd should have an internal
reference to the evtchn fd ?

Ian.

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