[Bug 56977] New: accept()-ed socket fds are never marked as cacheable

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=56977

Bug ID: 56977
           Summary: accept()-ed socket fds are never marked as cacheable
           Product: Wine
           Version: 9.13
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: wineserver
          Assignee: [e-mail]
          Reporter: [e-mail]
                CC: [e-mail], [e-mail]
   Regression SHA1: 89f77a93a6c96896d90c943bc3e82139114cf58c
      Distribution: ---

allow_fd_caching() is not called for accept()-ed sockets, causing severe
performance degradation due to extra server_get_unix_fd() call overhead per
every socket I/O operation.

Affected applications:

- DJMAX RESPECT V creates a loopback TCP socket pair. The "server" side
ESTABLISHED socket is affected.