Christoph Hellwig
a9ab5e8406
nfs: page cache invalidation for dio
...
Make sure to properly invalidate the pagecache before performing direct I/O,
so that no stale pages are left around. This matches what the generic
direct I/O code does. Also take the i_mutex over the direct write submission
to avoid the lifelock vs truncate waiting for i_dio_count to decrease, and
to avoid having the pagecache easily repopulated while direct I/O is in
progrss. Again matching the generic direct I/O code.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2014-01-13 17:29:50 -05:00
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