From: Gui Jianfeng Date: Tue, 13 Apr 2010 08:05:49 +0000 (+0800) Subject: io-controller: Add a new interface "weight_device" for IO-Controller X-Git-Tag: v2.6.35-rc1~442^2~80 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=34d0f179d6dd711d3fc13c0820a456c59aae8048;p=pandora-kernel.git io-controller: Add a new interface "weight_device" for IO-Controller Currently, IO Controller makes use of blkio.weight to assign weight for all devices. Here a new user interface "blkio.weight_device" is introduced to assign different weights for different devices. blkio.weight becomes the default value for devices which are not configured by "blkio.weight_device" You can use the following format to assigned specific weight for a given device: #echo "major:minor weight" > blkio.weight_device major:minor represents device number. And you can remove weight for a given device as following: #echo "major:minor 0" > blkio.weight_device V1->V2 changes: - use user interface "weight_device" instead of "policy" suggested by Vivek - rename some struct suggested by Vivek - rebase to 2.6-block "for-linus" branch - remove an useless list_empty check pointed out by Li Zefan - some trivial typo fix V2->V3 changes: - Move policy_*_node() functions up to get rid of forward declarations - rename related functions by adding prefix "blkio_" Signed-off-by: Gui Jianfeng Acked-by: Vivek Goyal Signed-off-by: Jens Axboe --- Reading git-diff-tree failed