From: Ross Zwisler <ross.zwisler@linux.intel.com>
To: linux-kernel@vger.kernel.org
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>,
Alexander Viro <viro@zeniv.linux.org.uk>,
Matthew Wilcox <willy@linux.intel.com>,
linux-fsdevel@vger.kernel.org, linux-mm@kvack.org,
Andrew Morton <akpm@linux-foundation.org>,
Dan Williams <dan.j.williams@intel.com>,
Dave Chinner <david@fromorbit.com>, Jan Kara <jack@suse.com>,
"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
linux-nvdimm@lists.01.org
Subject: [PATCH v3 0/3] Revert locking changes in DAX for v4.3
Date: Mon, 5 Oct 2015 14:32:51 -0600 [thread overview]
Message-ID: <1444077174-22016-1-git-send-email-ross.zwisler@linux.intel.com> (raw)
This series reverts 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")
It also temporarily disables the newly added DAX PMD fault path because of a
deadlock. We are re-working the way that DAX does its locking for v4.4, so for
now just disable DAX PMD faults and fall back to PAGE_SIZE faults to make sure
we don't hit this deadlock.
Changes from v2:
- Temporarily disable the DAX PMD fault path while we re-work DAX locking for
v4.4.
Ross Zwisler (3):
Revert "mm: take i_mmap_lock in unmap_mapping_range() for DAX"
Revert "dax: fix race between simultaneous faults"
dax: temporarily disable DAX PMD fault path
fs/dax.c | 90 ++++++++++++++++++++++++++++---------------------------------
mm/memory.c | 2 ++
2 files changed, 43 insertions(+), 49 deletions(-)
--
2.1.0
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next reply other threads:[~2015-10-05 20:33 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-05 20:32 Ross Zwisler [this message]
2015-10-05 20:32 ` [PATCH v3 1/3] Revert "mm: take i_mmap_lock in unmap_mapping_range() for DAX" Ross Zwisler
2015-10-05 20:32 ` [PATCH v3 2/3] Revert "dax: fix race between simultaneous faults" Ross Zwisler
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