Commit 086352f1 authored Jan 14, 2014 by Steven Whitehouse

GFS2: No need to invalidate pages for a dio read



We recently fixed the writeback of pages prior to performing
direct i/o, however the initial fix was perhaps a bit heavy
handed. There is no need to invalidate pages if the direct i/o
is only a read, since they will be identical to what has been
flushed to disk anyway.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>

parent 39849d69

fs/gfs2/aops.c

+3 −2

Original line number	Diff line number	Diff line
		@@ -1032,7 +1032,8 @@ static ssize_t gfs2_direct_IO(int rw, struct kiocb *iocb,
		unmap_shared_mapping_range(ip->i_inode.i_mapping, offset, len);
		rv = filemap_write_and_wait_range(mapping, lstart, end);
		if (rv)
		return rv;
		goto out;
		if (rw == WRITE)
		truncate_inode_pages_range(mapping, lstart, end);
		}

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