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From: NeilBrown <neilb@suse.com>
To: Shaohua Li <shli@kernel.org>
Cc: linux-raid@vger.kernel.org
Subject: [md PATCH 0/5] Address deadlock associated with setting suspend_lo
Date: Tue, 17 Oct 2017 13:46:43 +1100	[thread overview]
Message-ID: <150820826980.1646.6380214598725492144.stgit@noble> (raw)

This series fixes the issue that Xiao Ni found
where a deadlock can happen if there are active writes
to an md/raid5 waiting for suspend_lo to be increased.

The last patch contains the important fix.  The others
prepare for it so that it can work reliably.

Thanks,
NeilBrown

---

NeilBrown (5):
      md: always hold reconfig_mutex when calling mddev_suspend()
      md: don't call bitmap_create() while array is quiesced.
      md: move suspend_hi/lo handling into core md code
      md: use mddev_suspend/resume instead of ->quiesce()
      md: allow metadata update while suspending.


 drivers/md/dm-raid.c     |    5 ++-
 drivers/md/md.c          |   74 ++++++++++++++++++++++++++++++++++------------
 drivers/md/md.h          |    6 ++++
 drivers/md/raid1.c       |   12 ++-----
 drivers/md/raid5-cache.c |   18 ++++++++---
 drivers/md/raid5.c       |   22 --------------
 6 files changed, 82 insertions(+), 55 deletions(-)

--
Signature


             reply	other threads:[~2017-10-17  2:46 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-10-17  2:46 NeilBrown [this message]
2017-10-17  2:46 ` [md PATCH 1/5] md: always hold reconfig_mutex when calling mddev_suspend() NeilBrown
2017-10-18  6:11   ` Shaohua Li
2017-10-18  7:35     ` NeilBrown
2017-10-19  1:17       ` [md PATCH 1/5 v2] " NeilBrown
2017-10-19  3:45         ` Shaohua Li
2017-10-19  6:29           ` NeilBrown
2017-10-20  4:37             ` Shaohua Li
2017-10-23  0:02               ` NeilBrown
2017-10-23  1:48                 ` Shaohua Li
2017-10-17  2:46 ` [md PATCH 5/5] md: allow metadata update while suspending NeilBrown
2017-10-17  2:46 ` [md PATCH 4/5] md: use mddev_suspend/resume instead of ->quiesce() NeilBrown
2017-10-17  2:46 ` [md PATCH 3/5] md: move suspend_hi/lo handling into core md code NeilBrown
2017-10-18  6:16   ` Shaohua Li
2017-10-18  7:40     ` NeilBrown
2017-10-19  1:49       ` [md PATCH 6/5] md: remove special meaning of ->quiesce(.., 2) NeilBrown
2017-10-17  2:46 ` [md PATCH 2/5] md: don't call bitmap_create() while array is quiesced NeilBrown

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