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authorDan Williams <dan.j.williams@intel.com>2016-01-29 05:13:39 +0100
committerDan Williams <dan.j.williams@intel.com>2016-01-30 22:35:31 +0100
commit9f4736fe7ca804aa79b5916221bb13dfc6221a0f (patch)
tree1604ce0292634817892790f0eb8cdb0e1821de1e /crypto
parentfs, block: force direct-I/O for dax-enabled block devices (diff)
downloadlinux-9f4736fe7ca804aa79b5916221bb13dfc6221a0f.tar.xz
linux-9f4736fe7ca804aa79b5916221bb13dfc6221a0f.zip
block: revert runtime dax control of the raw block device
Dynamically enabling DAX requires that the page cache first be flushed and invalidated. This must occur atomically with the change of DAX mode otherwise we confuse the fsync/msync tracking and violate data durability guarantees. Eliminate the possibilty of DAX-disabled to DAX-enabled transitions for now and revisit this for the next cycle. Cc: Jan Kara <jack@suse.com> Cc: Jeff Moyer <jmoyer@redhat.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Dave Chinner <david@fromorbit.com> Cc: Matthew Wilcox <willy@linux.intel.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Ross Zwisler <ross.zwisler@linux.intel.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'crypto')
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