[Xen-devel] [PATCH V3] libxenstore: filter watch events in libxenstore when we unwatch

[Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>]

Ian Jackson writes ("[PATCH V3] libxenstore: filter watch events in libxenstore 
when we unwatch"):
>   *    Tokens need not be unique.        Tokens specified in xs_watch
>   *                                      calls must be unique.

This is vague about lifetime.  Perhaps:

  A token specified in an xs_watch call may not be also specified in
  a second xs_watch call until a successful xs_unwatch for the first
  watch has returned.

?

Ian.

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