On 03/29/2012 02:40 AM, Vivek Goyal wrote:

On Wed, Mar 28, 2012 at 08:13:08PM +0800, Fengguang Wu wrote:

quoted

Here is one possible solution to "buffered write IO controller", based on Linux
v3.3

git://git.kernel.org/pub/scm/linux/kernel/git/wfg/linux.git  buffered-write-io-controller

Features:
- support blkio.weight

So this does proportional write bandwidth division on bdi for buffered
writes?

yes.

quoted

- support blkio.throttle.buffered_write_bps

This is absolute limit systemwide or per bdi?

system-wide and Fengguang thinks that per bdi should be implemented
trivially.

[..]

quoted

The test results included in the last patch look pretty good in despite of the
simple implementation.

 [PATCH 1/6] blk-cgroup: move blk-cgroup.h in include/linux/blk-cgroup.h
 [PATCH 2/6] blk-cgroup: account dirtied pages
 [PATCH 3/6] blk-cgroup: buffered write IO controller - bandwidth weight
 [PATCH 4/6] blk-cgroup: buffered write IO controller - bandwidth limit
 [PATCH 5/6] blk-cgroup: buffered write IO controller - bandwidth limit interface
 [PATCH 6/6] blk-cgroup: buffered write IO controller - debug trace

Hi Fengguang,

Only patch 0 and patch 4 have shown up in my mail box. Same seems to be
the case for lkml. I am wondering what happened to rest of the patches.

Same here. But, the rest of the patches showed up much later. In any
case you can access the fullset from here

http://git.kernel.org/?p=linux/kernel/git/wfg/linux.git;a=shortlog;h=refs/heads/buffered-write-io-controller

Will understand the patches better once I have the full set.

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