Re: [RFC] Generic deferred file writing

[Daniel Phillips]

Linus Torvalds wrote:
>  I do not believe that "get_block()" is as big of a problem as people make
>  it out to be.

I didn't mention get_block - disk accesses obviously far outweigh
filesystem cpu/cache usage in overall impact.  The question is, what
happens to disk access patterns when we do the deferred allocation.

> One form of deferred writes I _do_ like is the mount-time-option form.
> Because that one doesn't add complexity. Kind of like the "noatime" mount
> option - it can be worth it under some circumstances, and sometimes it's
> acceptable to not get 100% unix semantics - at which point deferred writes
> have none of the disadvantages of trying to be clever.

And the added attraction of requiring almost no effort.
        
--
Daniel
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