[Bug 47270] New: User shared data thread is always created

https://bugs.winehq.org/show_bug.cgi?id=47270

Bug ID: 47270
           Summary: User shared data thread is always created
           Product: Wine-staging
           Version: 4.9
          Hardware: x86
                OS: Linux
            Status: UNCONFIRMED
          Severity: minor
          Priority: P2
         Component: -unknown
          Assignee: [e-mail]
          Reporter: [e-mail]
                CC: [e-mail], [e-mail]
      Distribution: ---

Due to the changes to "Fake Dlls" patch set, specifically for the 64-bit
syscalls, the user_shared_data is accessed in every Wine process. While this is
not incorrect, it does represent a change from the original intentions of the
"user_shared_data" patch set, which was to only create this extra thread, and
the associated overhead, on programs that *need* to access user_shared_data.

If this new behavior is going to stay, then it would probably be a good idea to
revisit the "user_shared_data" patch set. For instance, one might simplify it
to always create the user shared data thread. Alternatively, if the new
behavior is undesirable, then we should find a way to prevent it.

(I am not personally convinced that the theoretical overhead is a problem.
There was a long discussion about this on the old wine-staging patch submission
website which no longer exists.)