Messages in this thread | | | Subject | Re: Increase dirty_ratio and dirty_background_ratio? | From | Chris Mason <> | Date | Thu, 08 Jan 2009 11:55:01 -0500 |
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On Thu, 2009-01-08 at 08:48 -0800, Linus Torvalds wrote: > > On Thu, 8 Jan 2009, David Miller wrote: > > > From: Andrew Morton <akpm@linux-foundation.org> > > Date: Thu, 8 Jan 2009 03:02:45 -0800 > > > > > The kernel can't get this right - it doesn't know the usage > > > patterns/workloads, etc. > > > > I don't agree with that. > > We can certainly try to tune it better. >
Does it make sense to hook into kupdate? If kupdate finds it can't meet the no-data-older-than 30 seconds target, it lowers the sync/async combo down to some reasonable bottom.
If it finds it is going to sleep without missing the target, raise the combo up to some reasonable top.
-chris
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