current-users: Re: Experimental zero-copy for TCP and UDP transmit-side

Subject: Re: Experimental zero-copy for TCP and UDP transmit-side
To: Tomas Svensson <ts@unix1.net>
From: enami tsugutomo <enami@sm.sony.co.jp>
List: current-users
Date: 05/13/2002 12:57:43

Tomas Svensson <ts@unix1.net> writes:

> lukemftpd can't utilize zero-copy by default? It's not using mmap()
> and it's overwriting it's buffer immediately after write() returns.
> 
> I started to change ftpd into using mmap() but it made the kernel crash
> (only if I used SOSEND_LOAN).

I've modified our ftpd to use mmap() and found a uvm_loan bug.

enami.