Re: [PATCH] blk-throttle: don't check whether or not lower limit is valid if CONFIG_BLK_DEV_THROTTLING_LOW is off
From: Jens Axboe <axboe@kernel.dk>
Date: 2020-12-02 19:45:43
Also in:
cgroups, lkml
On 11/25/20 8:18 PM, Yu Kuai wrote:
blk_throtl_update_limit_valid() will search for descendants to see if 'LIMIT_LOW' of bps/iops and READ/WRITE is nonzero. However, they're always zero if CONFIG_BLK_DEV_THROTTLING_LOW is not set, furthermore, a lot of time will be wasted to iterate descendants. Thus do nothing in blk_throtl_update_limit_valid() in such situation.
Applied, thanks. -- Jens Axboe