On Mon, Mar 10, 2014 at 11:34:45AM -0500, Larkin Lowrey wrote: > > has 160+MB of dirty data. The dirty data is being written at a rate of 1 > page per second (8 sectors). At this rate it'll take 11 hrs to finish. I > like to keep this array spun down when inactive but the drives can't > spin down since they're being written to once a second. > > This never happened when running 3.12.7. Is there anything I can do > about this?
I believe this is intended behaviour - as the cache approaches the writeback_percent level of fullness the rate of writeback will increase. It is possible to override the writeback_rate by echoing a new value into it but it will also change itself so you may find the rate falls again... Perhaps that can be avoided by echoing 0 into writeback_percent too (see http://evilpiepirate.org/git/linux-bcache.git/tree/Documentation/bcache.txt?h=bcache-dev#n265)... -- Sitsofe | http://sucs.org/~sits/ -- To unsubscribe from this list: send the line "unsubscribe linux-bcache" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
