Re: Comment on patch to remove nr_async_pages limit

[Zlatko Calusic <zlatko.calusic@iskon.hr>]

Ed Tomlinson <tomlins@cam.org> writes:

[snip]
> Maybe we can have the best of both worlds.  Is it possible to allocate the BH
> early and then defer the IO?  The idea being to make IO possible without having
> to allocate.  This would let us remove the async page limit but would ensure
> we could still free.
> 

Yes, this is a good idea if you ask me. Basically, to remove as many
limits as we can, and also to secure us from the deadlocks. With just
a few pages of extra memory for the reserved buffer heads, I think
it's a fair game. Still, pending further analysis...
-- 
Zlatko
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