tcp output question

[Kazuaki Oda]

Hi, list,

I'm reading FreeBSD's network codes, and I have noticed that we call
tcp_output() from tcp_usr_send() with tcbinfo locked.  According to the
comment in the tcp_usr_send(), we must call tcp_connect() or
tcp_usrclosed() with tcbinfo locked.  But it seems that we does not need to
lock it to call tcp_output().  Is there any reason not to unlock it before
calling tcp_output()?  I have tried the attached patch, so I get about
10-20% performance up when running my test server program.


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Kazuaki Oda
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