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Commit 50fd8010 authored by Eric Van Hensbergen's avatar Eric Van Hensbergen
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9p: soften invalidation in loose_mode 



Loose mode in 9p utilizes the page cache without respecting coherency with
the server.  Any writes previously invaldiated the entire mapping for a file.
This patch softens the behavior to only invalidate the region of the actual
write.

Signed-off-by: default avatarEric Van Hensbergen <ericvh@gmail.com>
parent ba17674f

fs/9p/vfs_file.c

+4 −2
Original line number Diff line number Diff line
@@ -162,15 +162,17 @@ v9fs_file_write(struct file *filp, const char __user * data, 


	fid = filp->private_data;

	ret = p9_client_uwrite(fid, data, *offset, count);

	if (ret > 0)

	if (ret > 0) {

		invalidate_inode_pages2_range(inode->i_mapping, *offset,

								*offset+ret);

		*offset += ret;

	}



	if (*offset > inode->i_size) {

		inode->i_size = *offset;

		inode->i_blocks = (inode->i_size + 512 - 1) >> 9;

	}



	invalidate_inode_pages2(inode->i_mapping);

	return ret;

}