i=rread
fix tests for low memory

make llog more smp safe.
don't write big array into journal.
fix return codes in llog_put_cat_list/llog_get_cat_list.

Branch b1_6
b=16679
i=umka
i=adilger

b=16678
i=nathan

i=Robert.Read
o=Brian.Behlendorf
test_27b fix: check mount

i=Robert.Read
o=Brian.Behlendorf
test_27b fix: check mount

i=Adilger
fix test_18 to check the available space

i=Adilger
fix test_18 to check the available space

b=16317
i=adilger

conf-sanity test case for verifying that the mounted client data is present.

if client connected until mds will be know about real ost count
get LOV EA can be fail because mds not allocate enougth buffer
for LOV EA.
Branch b1_6
b=16080
i=tappro
i=johann

i=Adilger
i=Zhenyu.Xu
conf-sanity test_41 fix for ostcount -ne 1

i=Adilger
i=Zhenyu.Xu
conf-sanity test_41 fix for ostcount -ne 1

i=Adilger
avoid rm -fr failure caused by nfs slowness

i=Adilger
avoid rm -fr failure caused by nfs slowness

b=14693
o=bowen.zhou
i=johann, bobijam

test case for "'lctl conf_param' stores invalid parameter, future mounts fail"

b=14693
o=bowen.zhou
i=johann, bobijam

test case for "'lctl conf_param' stores invalid parameter, future mounts fail"

i=Adilger
remove tdir creation from run_one: the test has to create tdir by
itself if it needs this dir

i=Adilger
remove tdir creation from run_one: the test has to create tdir by
itself if it needs this dir

b=14134
i=johann

minor fix handling '/etc/mtab' issue.

b=14134
i=johann

minor fix handling '/etc/mtab' issue.

b=15716
i=rread
i=johann

b=15759
r=rread, green

Description: MDS or OSS service threads fail startup with -24 (-EMFILE)
Details    : During startup under recovery, it is possible for service
             thread startup to fail in ptlrpc_start_threads() if one
             of the threads begins processing a request and then starts
             an additional thread.  This causes ptlrpc_start_threads()
             to try and start 1 too many threads and get an error.

b=14134
i=nathan, johann

Description: enable MGS and MDT services start separately
Details    : add a 'nomgs' option in mount.lustre to enable start a MDT with
             a co-located MGS without starting the MGS, which is a complement
             to 'nosvc' mount option.

b=14134
i=nathan, johann

Description: enable MGS and MDT services start separately
Details    : add a 'nomgs' option in mount.lustre to enable start a MDT with
             a co-located MGS without starting the MGS, which is a complement
             to 'nosvc' mount option.

i=Adilger

rename subtests to skipping mechanism works properly

i=Adilger

rename subtests to skipping mechanism works properly

r=adilger

to replace the sysctl lustre.* and lnet.* instances with lctl {get,set}_param

r=Andreas
 to replace the sysctl lustre.* and lnet.* instances with lctl {get,set}_param

i=Adilger

skip test_32a, test_32b for NETTYPE != tcp

i=Adilger

skip test_32a, test_32b for NETTYPE != tcp

b=15759
r=rread, green

Don't consider -EMFILE (too many threads) a fatal startup error

i=Adilger

keep conf-sanity test_32a and test_32b in sync with b1_6

i=Adilger

the minor cleanup of the previous fix:
-- after we get rid of $tdir we do not need to create $tmpdir, because
   unzip -d <dir> does not need <dir> exists, it needs the parent directory
   of <dir> exists; unzip creates <dir> if it does not exists.

i=Adilger

conf-sanity test_32a, test_32b: create tmp dir correctly

i=grev

fix for test_16 failure due to trying to create mntpt dir on Read-Only fs.

i=grev

fix for test_16 failure due to trying to create mntpt dir on Read-Only fs.

i=Adilger
skip test_37 if CLIENTMODSONLY is set

i=Adilger
skip test_37 if CLIENTMODSONLY is set

i=Nathan.Rutman
skip test_37 for client only testing

i=Nathan.Rutman
skip test_37 for client only testing

b=14413;          14763
r=shadow, johann; bwzhou

fix leak-finder and add a test for conf-sanity.sh (including andreas's patch
to suppress the false negative of test 39)