[dm-devel] [PATCH v3] dm-cache watermarks

[Steven Wilton]

I realised that I over-thought the original logic.  The attached patch 
is much simpler - write back dirty cache entries at the migration 
threshold rate when we are over the low watermark, and we write back as 
fast as possible when we go over the high watermark.

The current behaviour can be replicated by setting the high watermark to 
100, and the low watermark to 0.

regards

Steven
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