Re: Possible Idea with filesystem buffering.

Hans Reiser
2002-01-20T21:29:01Z

Mark Hahn wrote:

>On Sun, 20 Jan 2002, Hans Reiser wrote:
>
>>Write clustering is one thing it achieves. When we flush a slum, the
>>
>
>sure, that's fine. when the VM tells you to write a page,
>you're free to write *more*, but you certainly must give back
>that particular page. afaicr, this was the conclusion
>of the long-ago thread that you're referring to.
>
>regards, mark hahn.
>
>
>
This is bad for use with internal nodes. It simplifies version 4 a
bunch to assume that if a node is in cache, its parent is also. Not
sure what to do about it, maybe we need to copy the node. Surely we
don't want to copy it unless it is a DMA related page cleaning.

Hans