Re: [PATCH V3] block/throttle: Add IO throttled information inblkio.throttle

From: Tejun Heo
Date: Thu Oct 18 2012 - 19:24:03 EST

Hello, Vivek.

On Wed, Oct 17, 2012 at 09:49:45AM -0400, Vivek Goyal wrote:
> Can you explain a bit more. Whe do you mean by "total number queued". I
> think throttle.io_queued will total number of bios queued in the cgroup
> at the time of query.

Instead of exposing the number that blk-throttle currently has
deferred, we can expose the number of bios that have been sent to
blk-throttle and the number of bios which left blk-throttle, both
monotically increasing and the difference indicating the number being
deferred. That way we can stick to the usual stats facility.


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