IOV_MAX is the maximum supported vector count on a given platform. Limit the count to IOV_MAX if higher. As we are performing non-blocking IO getting a smaller return value is handled naturally. Change-Id: I94ef67a03ed0e10da67a776af2b55506bf721611 BUG: 1034398 Signed-off-by: Anand Avati <avati@redhat.com> Reviewed-on: http://review.gluster.org/6354 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Amar Tumballi <amarts@gmail.com>