linux-kernel - [PATCH -next v2 0/6] md: fix that MD_RECOVERY_RUNNING can be cleared while sync

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Message-Id: <20230529132037.2124527-1-yukuai1@huaweicloud.com>
Date:   Mon, 29 May 2023 21:20:31 +0800
From:   Yu Kuai <yukuai1@...weicloud.com>
To:     guoqing.jiang@...ux.dev, agk@...hat.com, snitzer@...nel.org,
        dm-devel@...hat.com, song@...nel.org
Cc:     linux-kernel@...r.kernel.org, linux-raid@...r.kernel.org,
        yukuai3@...wei.com, yukuai1@...weicloud.com, yi.zhang@...wei.com,
        yangerkun@...wei.com
Subject: [PATCH -next v2 0/6] md: fix that MD_RECOVERY_RUNNING can be cleared while sync_thread is still running

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

Changes in v2:
 - rebase for the latest md-next

Patch 1 revert the commit because it will cause MD_RECOVERY_RUNNING to be
cleared while sync_thread is still running. The deadlock this patch tries
to fix will be fixed by patch 2-5.

Patch 6 enhance checking to prevent MD_RECOVERY_RUNNING to be cleared
while sync_thread is still running.

Yu Kuai (6):
  Revert "md: unlock mddev before reap sync_thread in action_store"
  md: refactor action_store() for 'idle' and 'frozen'
  md: add a mutex to synchronize idle and frozen in action_store()
  md: refactor idle/frozen_sync_thread() to fix deadlock
  md: wake up 'resync_wait' at last in md_reap_sync_thread()
  md: enhance checking in md_check_recovery()

 drivers/md/dm-raid.c |   1 -
 drivers/md/md.c      | 124 +++++++++++++++++++++++++++++--------------
 drivers/md/md.h      |   5 ++
 3 files changed, 88 insertions(+), 42 deletions(-)

-- 
2.39.2