linux-kernel - [PATCH md-6.8 v2 0/9] dm-raid, md/raid: fix v6.7 regressions part2

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Message-Id: <20240305072306.2562024-1-yukuai1@huaweicloud.com>
Date: Tue,  5 Mar 2024 15:22:57 +0800
From: Yu Kuai <yukuai1@...weicloud.com>
To: xni@...hat.com,
	zkabelac@...hat.com,
	agk@...hat.com,
	snitzer@...nel.org,
	mpatocka@...hat.com,
	dm-devel@...ts.linux.dev,
	song@...nel.org,
	yukuai3@...wei.com,
	heinzm@...hat.com,
	jbrassow@...hat.com,
	neilb@...e.de
Cc: linux-kernel@...r.kernel.org,
	linux-raid@...r.kernel.org,
	yukuai1@...weicloud.com,
	yi.zhang@...wei.com,
	yangerkun@...wei.com
Subject: [PATCH md-6.8 v2 0/9] dm-raid, md/raid: fix v6.7 regressions part2

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

Changes in v2:
 - Change the title from '-next' to 'md-6.8';
 - Add Acked-by tag from Mike;
 - Add Singed-off-by tag from Xiao;

link to part1: https://lore.kernel.org/all/CAPhsuW7u1UKHCDOBDhD7DzOVtkGemDz_QnJ4DUq_kSN-Q3G66Q@mail.gmail.com/

part1 contains fixes for deadlocks for stopping sync_thread

This set contains fixes:
 - reshape can start unexpected, cause data corruption, patch 1,5,6;
 - deadlocks that reshape concurrent with IO, patch 8;
 - a lockdep warning, patch 9;

I'm running lvm2 tests with following scripts with a few rounds now,

for t in `ls test/shell`; do
        if cat test/shell/$t | grep raid &> /dev/null; then
                make check T=shell/$t
        fi
done

There are no deadlocks now, there are still some fs corruption, however,
it's verified there are no new failed tests compared to v6.6.

Yu Kuai (9):
  md: don't clear MD_RECOVERY_FROZEN for new dm-raid until resume
  md: export helpers to stop sync_thread
  md: export helper md_is_rdwr()
  md: add a new helper reshape_interrupted()
  dm-raid: really frozen sync_thread during suspend
  md/dm-raid: don't call md_reap_sync_thread() directly
  dm-raid: add a new helper prepare_suspend() in md_personality
  dm-raid456, md/raid456: fix a deadlock for dm-raid456 while io
    concurrent with reshape
  dm-raid: fix lockdep waring in "pers->hot_add_disk"

 drivers/md/dm-raid.c | 93 ++++++++++++++++++++++++++++++++++----------
 drivers/md/md.c      | 73 ++++++++++++++++++++++++++--------
 drivers/md/md.h      | 38 +++++++++++++++++-
 drivers/md/raid5.c   | 32 ++++++++++++++-
 4 files changed, 196 insertions(+), 40 deletions(-)

-- 
2.39.2