Re: new lwbuf api and mpsafe sf_bufs

["Simon 'corecode' Schubert" <corecode@xxxxxxxxxxxx>]

Matthew Dillon wrote:
>     If you want to separate out private mappings like that I think the
>     LWBUFs have to cached just like they are with SFBUFs.  I like the
>     use of the objcache but I think the LWBUF code needs to retain 
>     a sysctl-programmable number of lwb elements in a RBTREE and try to
>     reuse the mappings.  i.e. it needs to be a bit more sophisticated
>     then your current design.

Why do these bufs have to go into an rbtree?  indexed by the page?  is the 
same page mapped so often?

cheers
  simon

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