From: Sam Lang <sam.lang@inktank.com>
Date: Tue, 9 Apr 2013 21:49:11 +0000 (-0500)
Subject: ceph: Use pseudo-random numbers to choose mds
X-Git-Tag: omap-for-v3.10/dt-fixes-for-merge-window~26^2~96
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a84cd29335f4ca38ca8405c1636ee3876bb292b5;p=pandora-kernel.git

ceph: Use pseudo-random numbers to choose mds

We don't need to use up entropy to choose an mds,
so use prandom_u32() to get a pseudo-random number.

Also, we don't need to choose a random mds if only
one mds is available, so add special casing for the
common case.

Fixes http://tracker.ceph.com/issues/3579

Signed-off-by: Sam Lang <sam.lang@inktank.com>
Reviewed-by: Greg Farnum <greg@inktank.com>
Reviewed-by: Alex Elder <elder@inktank.com>
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