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authorDan Williams2017-05-29 12:58:19 -0700
committerDan Williams2017-06-15 14:34:59 -0700
commit3c1cebff23cdca01c421411e953a9e239f2b9ef9 (patch)
tree91fe4cc0e3526e0795c28894692ec08c3852fed0 /lib/fault-inject.c
parentfec53774fd043038e57ac737d90e8d58975d6e92 (diff)
dax, pmem: introduce an optional 'flush' dax_operation
Filesystem-DAX flushes caches whenever it writes to the address returned through dax_direct_access() and when writing back dirty radix entries. That flushing is only required in the pmem case, so add a dax operation to allow pmem to take this extra action, but skip it for other dax capable devices that do not provide a flush routine. An example for this differentiation might be a volatile ram disk where there is no expectation of persistence. In fact the pmem driver itself might front such an address range specified by the NFIT. So, this "no flush" property might be something passed down by the bus / libnvdimm. Cc: Christoph Hellwig <hch@lst.de> Cc: Matthew Wilcox <mawilcox@microsoft.com> Cc: Ross Zwisler <ross.zwisler@linux.intel.com> Reviewed-by: Jan Kara <jack@suse.cz> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'lib/fault-inject.c')
0 files changed, 0 insertions, 0 deletions