On 05/19/2014 06:55 PM, Kent Overstreet wrote:
...Changing it back to 25% doesn't do anything? _that_ is odd...
I was wrong on this one. At first the CPU usage stayed the same, but after a while (as in > 10 minutes) CPU usage dropped to normal behaviour. Sorry, I was too impatient.
Can you send me the output of writeback_rate_debug? Check it once before you've done anything, when things are working normally (after a fresh boot when writeback_percent is nonzero, probably), then grab it again after you've set writeback_percent to 0 and then back to 25, when it's still spinning.
I will do so, probably tomorrow.
There seems to be two separate bugs here, the one I'm particularly concerned about is why setting writeback_percent back to 25 doesn't restore the old behaviour. Also, what kernel are you running?
I am using Fedora kernel version kernel-3.14.4-200.fc20.x86_64 -- To unsubscribe from this list: send the line "unsubscribe linux-bcache" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
