Re: scatter/gather in struct buf/bio

On Thursday 02 October 2008 02:11:38 pm Joel Jacobson wrote:
> Greetings -
> 
> I have something which would be vastly improved by the ability to  
> construct my own sgl to pass through a buf, and ran across:
> 
>    http://wiki.freebsd.org/Buf0x
> 
> Is there somewhere I can follow progress, and/or contribute assistance?

The jhb_bio branch still exists.  I've made some refinements to the sglist API 
and need to do so more.  I think my next test will be to add a sglist to each 
bio in geom_disk and geom_vfs.  I then might try to update physio (dd 
if=/dev/XXX) to not map buffers into KVA (probably tweakable via sysctl) and 
patch ATA to use the new bus dma call with the sglist in the bio and see what 
difference that makes.

-- 
John Baldwin