linux-kernel - [PATCH v2 0/8] md: fix and refactor io accounting and 'active

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Date:   Thu, 22 Jun 2023 00:51:02 +0800
From:   Yu Kuai <yukuai1@...weicloud.com>
To:     song@...nel.org, xni@...hat.com, pmenzel@...gen.mpg.de
Cc:     linux-raid@...r.kernel.org, linux-kernel@...r.kernel.org,
        yukuai3@...wei.com, yukuai1@...weicloud.com, yi.zhang@...wei.com,
        yangerkun@...wei.com
Subject: [PATCH v2 0/8] md: fix and refactor io accounting and 'active_io'

From: Yu Kuai <yukuai3@...wei.com>

Changes in v2:
 - fix some typos;
 - add review tag;

This patchset do following things:
 - make io accounting for all raid levels consistent, patch 1, 3-5;
 - enable io accounting for all raid levels, patch 6-8;
 - hold 'active_io' before io start to dispatch, and release 'active_io'
 when io is done, make mddev_suspend() will wait for io to be done, patch 2

This patch set also prepare to synchronize io and raid configuration, make
it possible to use 'active_io' in common layer to judge if normal io is
in flight.

Yu Kuai (8):
  md: move initialization and destruction of 'io_acct_set' to md.c
  md: also clone new io if io accounting is disabled
  raid5: fix missing io accounting in raid5_align_endio()
  md/raid1: switch to use md_account_bio() for io accounting
  md/raid10: switch to use md_account_bio() for io accounting
  md/md-multipath: enable io accounting
  md/md-linear: enable io accounting
  md/md-faulty: enable io accounting

 drivers/md/md-faulty.c    |  2 +
 drivers/md/md-linear.c    |  1 +
 drivers/md/md-multipath.c |  1 +
 drivers/md/md.c           | 78 +++++++++++++++++++--------------------
 drivers/md/md.h           |  6 +--
 drivers/md/raid0.c        | 16 +-------
 drivers/md/raid1.c        | 14 +++----
 drivers/md/raid1.h        |  1 -
 drivers/md/raid10.c       | 20 +++++-----
 drivers/md/raid10.h       |  1 -
 drivers/md/raid5.c        | 70 ++++++++++-------------------------
 11 files changed, 79 insertions(+), 131 deletions(-)

-- 
2.39.2