ceph: set up readahead size when rsize is not passed
authorYehuda Sadeh <yehuda@hq.newdream.net>
Fri, 22 Jul 2011 18:12:28 +0000 (11:12 -0700)
committerSage Weil <sage@newdream.net>
Tue, 26 Jul 2011 18:29:14 +0000 (11:29 -0700)
This should improve the default read performance, as without it
readahead is practically disabled.

Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net>

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