Re: speed up dirty data cleaning

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On Thu, Nov 07, 2013 at 04:18:35PM +0100, Stefan Priebe - Profihost AG wrote:
> After some time it seems to start writing out all the data at a good
> disk speed.
> 
> But how does bcache determine when to write which kind of data out of
> bcache.

There's a PD controller that tries to keep the amount of dirty data at
writeback_percent percentage of your cache size. But, since the dirty data
account was _still_ broken, that would screw up that PD controller.

Workaround is to set writeback_percent to 0
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