From: Christoph Hellwig <hch-jcswGhMUV9g@public.gmane.org>
To: Jan Kara <jack-AlSwsSmVLrQ@public.gmane.org>
Cc: linux-fsdevel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-ext4-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-nvdimm-hn68Rpc1hR1g9hUCZPvPmw@public.gmane.org
Subject: fix write synchronization for DAX
Date: Tue, 10 Jan 2017 16:48:06 +0100 [thread overview]
Message-ID: <1484063288-18255-1-git-send-email-hch@lst.de> (raw)
While I've fixed both ext4 and XFS to not incorrectly allow parallel
writers when mounting with -o dax ext4 still has this issue after the
iomap conversion.
Patch 1 fixes it, and patch 2 adds a lockdep assert to catch any new
file systems copy and pasting from the direct I/O path.
next reply other threads:[~2017-01-10 15:48 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-10 15:48 Christoph Hellwig [this message]
2017-01-10 15:48 ` [PATCH 1/2] ext4: fix DAX write locking Christoph Hellwig
2017-01-11 9:01 ` Jan Kara
[not found] ` <20170111090136.GE16116-4I4JzKEfoa/jFM9bn6wA6Q@public.gmane.org>
2017-02-08 17:14 ` Christoph Hellwig
[not found] ` <20170208171410.GA27359-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
2017-02-08 19:38 ` Theodore Ts'o
2017-02-08 19:41 ` Theodore Ts'o
2017-01-10 15:48 ` [PATCH 2/2] dax: assert that i_rwsem is held exclusive for writes Christoph Hellwig
2017-01-11 9:02 ` Jan Kara
[not found] ` <20170111090250.GF16116-4I4JzKEfoa/jFM9bn6wA6Q@public.gmane.org>
2017-02-08 19:43 ` Theodore Ts'o
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