----- Original Message -----
> From: "Jes Sorensen" <jes.sorensen@xxxxxxxxx>
> To: "Xiao Ni" <xni@xxxxxxxxxx>, linux-raid@xxxxxxxxxxxxxxx
> Sent: Tuesday, August 29, 2017 5:19:22 AM
> Subject: Re: [PATCH -v4 1/1] mdadm/test: Add one test case for raid5 reshape
>
> On 07/20/2017 03:58 AM, Xiao Ni wrote:
> > This case tries to allow raid5 reshape to use backwards direction.
> > It changes chunksize after reshape and stops the raid. Then starts
> > the raid again.
> >
> > Signed-off-by: Xiao Ni <xni@xxxxxxxxxx>
> > Suggested-by: Jes Sorensen <jes.sorensen@xxxxxxxxx>
> > Suggested-by: Zhilong Liu <zlliu@xxxxxxxx>
> > Suggested-by: Paul Menzel <pmenzel@xxxxxxxxxxxxx>
> > ---
> > test | 7 +++++++
> > tests/02r5grow | 17 +++++++++++++++++
> > 2 files changed, 24 insertions(+)
> >
> > diff --git a/test b/test
> > index 87e2df2..98e2981 100755
> > --- a/test
> > +++ b/test
> > @@ -320,6 +320,13 @@ check() {
> > grep -sq "inactive" /proc/mdstat ||
> > die "array is not inactive!"
> > ;;
> > + # It only can be used when there is only one raid
> > + chunk )
> > + chunk_size=`awk -F',' '/chunk/{print $2}' /proc/mdstat | awk -F'[a-z]'
> > '{print $1}'`
> > + if [ "$chunk_size" -ne "$2" ] ; then
> > + die "chunksize should be $2, but it's $chunk_size"
> > + fi
> > + ;;
> > * )
> > die "unknown check $1"
> > ;;
> > diff --git a/tests/02r5grow b/tests/02r5grow
> > index 386e82e..ea3101b 100644
> > --- a/tests/02r5grow
> > +++ b/tests/02r5grow
> > @@ -34,3 +34,20 @@ check nosync
> > sh tests/testdev $md0 3 $[size/2] 128
> >
> > mdadm -S $md0
> > +
> > +# create a raid5 array and change the chunk
> > +mdadm -CR $md0 --level raid5 --metadata=1.1 --chunk=32 --raid-disks 3
> > --size $[size/2] $dev1 $dev2 $dev3
> > +check wait
> > +check state UUU
> > +check chunk 32
> > +
> > +mdadm $md0 --grow --chunk=64
> > +check reshape
> > +check wait
> > +check chunk 64
> > +
> > +mdadm -S $md0
> > +mdadm -As
> > +check state UUU
> > +check chunk 64
> > +mdadm -Ss
>
> Hi Xiao,
>
> I don't like the last part running 'mdadm -As' this will auto-assemble
> any array in the system and you can get a false test failure because it
> will assume the first assembled array is the one you are looking for.
Hi Jes
Is it ok to change mdadm -As to mdadm -A $md0 $dev1 $dev2 $dev3
Regards
Xiao
>
> Cheers,
> Jes
>
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