Re: [RFC] IO scheduler based IO controller V9

From: Gui Jianfeng
Date: Sun Aug 30 2009 - 21:10:46 EST

Vivek Goyal wrote:
> Hi All,
> Here is the V9 of the IO controller patches generated on top of 2.6.31-rc7.
> For ease of patching, a consolidated patch is available here.
> Changes from V8
> ===============
> - Implemented bdi like congestion semantics for io group also. Now once an
> io group gets congested, we don't clear the congestion flag until number
> of requests goes below nr_congestion_off.
> This helps in getting rid of Buffered write performance regression we
> were observing with io controller patches.
> Gui, can you please test it and see if this version is better in terms
> of your buffered write tests.

Ok, will do.

Gui Jianfeng

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