On Wed, 2007-04-04 at 11:20 +0200, Miklos Szeredi wrote:
> > Provide scalable per backing_dev_info statistics counters modeled on the ZVC
> > code.
> 
> Why do we need global_bdi_stat()?  It should give approximately the
> same numbers as global_page_state(), no?

For those counters that are shared, yes. However I find it not obvious
that all BDI counter will always be mirrored in the page stats, and I
actually use it in 6/6, which introduces counters that are not mirrored
in the page stats.



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