linux-kernel - [PATCH v5] Fix DAX deadlocks for v4.3

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Message-Id: <1444258729-21974-1-git-send-email-ross.zwisler@linux.intel.com>
Date:	Wed,  7 Oct 2015 16:58:48 -0600
From:	Ross Zwisler <ross.zwisler@...ux.intel.com>
To:	linux-kernel@...r.kernel.org
Cc:	Ross Zwisler <ross.zwisler@...ux.intel.com>,
	Alexander Viro <viro@...iv.linux.org.uk>,
	Matthew Wilcox <willy@...ux.intel.com>,
	linux-fsdevel@...r.kernel.org, linux-mm@...ck.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Dan Williams <dan.j.williams@...el.com>,
	Dave Chinner <david@...morbit.com>, Jan Kara <jack@...e.com>,
	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
	linux-nvdimm@...ts.01.org,
	Matthew Wilcox <matthew.r.wilcox@...el.com>
Subject: [PATCH v5] Fix DAX deadlocks for v4.3

This was previously "Revert locking changes in DAX for v4.3".

Undo some recent changes to the locking scheme in DAX introduced by these two
commits:

commit 843172978bb9 ("dax: fix race between simultaneous faults")
commit 46c043ede471 ("mm: take i_mmap_lock in unmap_mapping_range() for DAX")

Changes from v4:
 - Collapsed two revert commits into a single fix commit.  No code changes were
   made.

Ross Zwisler (1):
  mm, dax: fix DAX deadlocks

 fs/dax.c    | 70 +++++++++++++++++++++++++------------------------------------
 mm/memory.c |  2 ++
 2 files changed, 31 insertions(+), 41 deletions(-)

-- 
2.1.0

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