From: Zhaoyang Huang <zhaoyang.huang@xxxxxxxxxx> Currently, request's ioprio are set via task's schedule priority(when no blkcg configured), which has high priority tasks possess the privilege on both of CPU and IO scheduling. Furthermore, most of the write requestes are launched asynchronosly from kworker which can't know the submitter's priorities. This commit works as a hint of original policy by promoting the request ioprio based on the page/folio's activity. The original idea comes from LRU_GEN which provides more precised folio activity than before. This commit try to adjust the request's ioprio when certain part of its folios are hot, which indicate that this request carry important contents and need be scheduled ealier. Zhaoyang Huang (2): block: introduce content activity based ioprio fs: introduce content activity based ioprio block/Kconfig | 15 +++++++++++++++ block/bio.c | 34 ++++++++++++++++++++++++++++++++++ fs/iomap/buffered-io.c | 3 +++ fs/mpage.c | 2 ++ include/linux/bio.h | 1 + 5 files changed, 55 insertions(+) -- 2.25.1
