Re: [Bug 106241] New: shutdown(3)/close(3) behaviour is incorrect for sockets in accept(3)
From: Eric Dumazet <hidden>
Date: 2015-10-21 21:18:32
On Wed, 2015-10-21 at 18:04 +0200, Casper.Dik@oracle.com wrote:
It is only expensive within the process itself.
thread synchro would require additional barriers to maintain this state,
for a very unlikely case.
The atomic_{inc|dec}() on file refcount are already a problem.
We certainly do not use/take a lock to find a file pointer into file
descriptor table.
(This lock is only used at open() or close() time)