linux-kernel - [PATCH 0/2] add io priority feature to work and use it in f2fs fsverity work

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Date: Fri, 21 Jun 2024 14:26:15 +0800
From: Yi Sun <yi.sun@...soc.com>
To: <sunyibuaa@...il.com>, <tj@...nel.org>, <jaegeuk@...nel.org>,
        <chao@...nel.org>
CC: <ebiggers@...gle.com>, <jiangshanlai@...il.com>,
        <kent.overstreet@...ux.dev>, <linux-kernel@...r.kernel.org>,
        <linux-f2fs-devel@...ts.sourceforge.net>, <niuzhiguo84@...il.com>,
        <Hao_hao.Wang@...soc.com>, <yunlongxing23@...il.com>
Subject: [PATCH 0/2] add io priority feature to work and use it in f2fs fsverity work

Many works will go to submit_bio(). In many cases, the default
io priority of kworker cannot meet the real-time requirements of
the work. Such as f2fs_verify_bio work.

If a high-task-priority process reads the verity-file, it is likely
that the high-task-priority process will be slowly because the
kworker's io priority is too low.

Patch 1: Provide a set of interfaces for temporarily changing the
io priority of kworker.
Patch 2: Use the interfaces provided in patch1 to temporarily change
the io priority of f2fs_verify_bio work.

Yi Sun (2):
  workqueue: add io priority to work_struct
  f2fs: set f2fs verify work io priority

 fs/f2fs/data.c                  |  5 ++++
 include/linux/workqueue.h       |  9 ++++++
 include/linux/workqueue_types.h |  6 ++++
 kernel/workqueue.c              | 51 +++++++++++++++++++++++++++++++++
 4 files changed, 71 insertions(+)

-- 
2.25.1