fix undefined shm_size

Root caused and fixed by Wanlong:

2014-02-26 19:31:41.830115500 [lkp process-result-queue 36526] truncate: option requires an argument -- 's'
2014-02-26 19:31:41.830117500 Try 'truncate --help' for more information.
2014-02-26 19:31:41.844520500 [lkp process-result-queue 36526] moved bad result from
/lkp/result/brickland2/micro/vm-scalability/16G-shm-xread-rand-m
t/x86_64-lkp/4e61e14b4be48e4b7264a304b0306d0c49a8d521/0 to
/lkp/bad-result/brickland2/micro/vm-scalability/16G-shm-xread-rand-mt/x86_64-lkp/4e61e14b4
be48e4b7264a304b0306d0c49a8d521/0

[allen@G08FNSTD121251 ~]$ cd
/lkp/bad-result/brickland2/micro/vm-scalability/16G-shm-xread-rand-mt/x86_64-lkp/4e61e14b4be48e4b7264a304b0306d0c49a8d521/0/
[allen@G08FNSTD121251 0]$ cat reproduce.sh
2014-02-26 19:30:12 mount -t tmpfs -o size=100% vm-scalability-tmp /tmp/vm-scalability-tmp
2014-02-26 19:30:12 truncate -s 135079759872 /tmp/vm-scalability.img
2014-02-26 19:30:12 mkfs.xfs -q /tmp/vm-scalability.img
2014-02-26 19:30:12 mount -o loop /tmp/vm-scalability.img /tmp/vm-scalability
2014-02-26 19:30:12 ./case-shm-xread-rand-mt
2014-02-26 19:30:12 truncate /tmp/vm-scalability-tmp/sparse-shm-xread-rand-mt -s         <====== ERROR
2014-02-26 19:30:12 ./usemem --runtime 300 -t 120 -f /tmp/vm-scalability-tmp/sparse-shm-xread-rand-mt --prealloc --readonly --random 0
2014-02-26 19:30:12 umount /tmp/vm-scalability-tmp
2014-02-26 19:30:12 umount /tmp/vm-scalability
2014-02-26 19:30:12 rm /tmp/vm-scalability.img

[allen@G08FNSTD121251 vm-scalability]$ cat case-shm-xread-rand-mt

source ./hw_vars

create_sparse_file $SHM_FILE $shm_size                        <======== ERROR

$USEMEM -t $nr_cpu -f $SHM_FILE --prealloc --readonly --random $((shm_size / 2))

rm $SHM_FILE
[allen@G08FNSTD121251 vm-scalability]$ cat hw_vars
...

mount_tmpfs()
{
        if [[ -d $TMPFS_MNT ]]; then
                mountpoint -q $TMPFS_MNT && umount $TMPFS_MNT
        else
                mkdir $TMPFS_MNT
        fi
        $CMD mount -t tmpfs -o size=100% vm-scalability-tmp $TMPFS_MNT

        shm_size=$(/usr/bin/stat -f -c "%b*%S" $TMPFS_MNT)
        shm_size=$((shm_size))                                  <=== Here is shm_size
}

...

create_sparse_file () {
        name=$1
        size=$2
        # echo "$name is of size $size"
        $CMD truncate $name -s $size
        # dd if=/dev/zero of=$name bs=1k count=1 seek=$((size >> 10)) 2>/dev/null
        # ls $SPARSE_ROOT
        # ls /tmp/vm-scalability/*
}
...

So, we should export shm_size variable there since the test case cannot
get this variable.

Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/hw_vars b/hw_vars
index b4f6965..44fcd6b 100755
--- a/hw_vars
+++ b/hw_vars
@@ -25,7 +25,7 @@ mount_tmpfs()
 	$CMD mount -t tmpfs -o size=100% vm-scalability-tmp $TMPFS_MNT
 
 	shm_size=$(/usr/bin/stat -f -c "%b*%S" $TMPFS_MNT)
-	shm_size=$((shm_size))
+	export shm_size=$((shm_size))
 }
 
 # sparse files won't work as expected on tmpfs/nfs