Messages in this thread | | | Subject | Re: [PATCH 8/8] vm: Add an tuning knob for vm.max_writeback_pages | From | Peter Zijlstra <> | Date | Wed, 02 Sep 2009 09:35:08 +0200 |
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> On Tue, 2009-09-01 at 16:27 -0400, Theodore Tso wrote:
> > So perhaps the best argument for not making this be a tunable is that > > in the long run, we will need to put in a better algorithm for > > controlling how much writeback we want to do before we start > > saturating RAID arrays, and in that new algorithm this tunable may no > > longer make sense. Fine; at that point, we can make it go away. For > > now, though, it seems to be the best way to tweak what is going on, > > since I doubt we'll be able to come up with one magic number that will > > satisfy everyone.
Also, what is the incentive to actually improve the situation once we merge this? People will say, turn the knob and don't bother us.
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