Re: [PATCH] mm: disallow direct reclaim page writeback

[Arjan van de Ven]

On Mon, 19 Apr 2010 11:08:05 +1000
Dave Chinner <david@xxxxxxxxxxxxx> wrote:

> > Maybe we need to do the background dirty writes a bit more
> > aggressive... or play with heuristics where we get an adaptive
> > timeout (say, if the file got closed by the last opener, then do a
> > shorter timeout)
> 
> Realistically, I'm concerned about preventing the worst case
> behaviour from occurring - making the background writes more
> agressive without preventing writeback in LRU order simply means it
> will be harder to test the VM corner case that triggers these
> writeout patterns...


while I appreciate that the worst case should not be uber horrific...
I care a LOT about getting the normal case right... and am willing to
sacrifice the worst case for that.. (obviously not to infinity, it
needs to be bounded)

-- 
Arjan van de Ven 	Intel Open Source Technology Centre
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