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Date: Sun, 05 Dec 2004 20:22:54 -0800
From: Nate Lawson <nate@root.org>
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To: Alan Cox <alc@FreeBSD.org>
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Subject: Re: cvs commit: src/sys/conf files src/sys/kern kern_subr.c     
 uipc_jumbo.c src/sys/pci if_ti.c src/sys/sys jumbo.h
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Alan Cox wrote:
> alc         2004-12-06 00:43:40 UTC
> 
>   FreeBSD src repository
> 
>   Modified files:
>     sys/conf             files 
>     sys/kern             kern_subr.c 
>     sys/pci              if_ti.c 
>   Removed files:
>     sys/kern             uipc_jumbo.c 
>     sys/sys              jumbo.h 
>   Log:
>   Update the Tigon 1 and 2 driver to use the sf_buf API for implementing
>   zero-copy receive of jumbo frames.  This eliminates the need for the
>   jumbo frame allocator implemented in kern/uipc_jumbo.c and sys/jumbo.h.
>   Remove it.
>   
>   Note: Zero-copy receive of jumbo frames did not work without these changes;
>   I believe there was insufficient locking on the jumbo vm object.
>   
>   Tested by: ken@
>   Discussed with: gallatin@
>   
>   Revision  Changes    Path
>   1.973     +0 -1      src/sys/conf/files
>   1.93      +4 -6      src/sys/kern/kern_subr.c
>   1.12      +0 -254    src/sys/kern/uipc_jumbo.c (dead)
>   1.98      +23 -15    src/sys/pci/if_ti.c
>   1.6       +0 -59     src/sys/sys/jumbo.h (dead)

Excellent, thanks for doing this.  Having a generic zero-copy API was 
something we had needed for a long time.  Perhaps cam_periph_mapmem() 
(sys/cam/cam_periph.c) could also benefit?

-Nate