nfs05.sh: Lower down the default values

nfs05_make_tree.c runs make which needs on Btrfs quite a lot of
temporary space. This is a preparation for the next commit which
start using all filesystems via TST_ALL_FILESYSTEMS=1. Currently we use
300 MB, which was not enough for Btrfs:

Filesystem     Type      Size  Used Avail Use% Mounted on
/dev/loop0     btrfs     300M   62M   20K 100% /tmp/LTP_nfs05.Vau10kcszO/mntpoint

More space is required on ppc64le which uses 64KB page size (instead of
the default 4KB for most of archs).

Proper solution would be to detect available size in nfs05_make_tree.c
and lower down values based on free space.

Link: https://lore.kernel.org/ltp/[email protected]/
Acked-by: Cyril Hrubis <[email protected]>
Signed-off-by: Petr Vorel <[email protected]>

Author: pevik

testcases/network/nfs/nfs_stress/nfs05.sh

@@ -8,9 +8,9 @@
 #
 # Created by: Robbie Williamson ([email protected])
 
-DIR_NUM=${DIR_NUM:-"10"}
-FILE_NUM=${FILE_NUM:-"30"}
-THREAD_NUM=${THREAD_NUM:-"8"}
+DIR_NUM=${DIR_NUM:-"5"}
+FILE_NUM=${FILE_NUM:-"20"}
+THREAD_NUM=${THREAD_NUM:-"5"}
 TST_NEEDS_CMDS="make gcc"
 TST_TESTFUNC="do_test"