Re: [PATCH v2 3/9] geneirc/077 fix min size for btrfs

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On Tue, Sep 25, 2018 at 12:24:16PM +0800, Anand Jain wrote:
> If btrfs need to be tested at its default blockgroup which is non-mixed,
> then it needs at least 256mb.
> 
> Signed-off-by: Anand Jain <anand.jain@xxxxxxxxxx>

(Sorry for the late review..)

> ---
>  tests/generic/077 | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/tests/generic/077 b/tests/generic/077
> index ef6af18c83e3..ec236992513f 100755
> --- a/tests/generic/077
> +++ b/tests/generic/077
> @@ -49,8 +49,7 @@ rm -f $seqres.full
>  _scratch_unmount >/dev/null 2>&1
>  echo "*** MKFS ***"                         >>$seqres.full
>  echo ""                                     >>$seqres.full
> -SIZE=`expr 50 \* 1024 \* 1024`
> -_scratch_mkfs_sized $SIZE                   >>$seqres.full 2>&1 \
> +_scratch_mkfs_sized $((256 * 1024 *1024))   >>$seqres.full 2>&1 \
>  	|| _fail "mkfs failed"

Hmm, this test copies "/lib/modules/" to fill the original 50M
filesystem (which seems a bad way to me)

"
# Something w/ enough data to fill 50M of fs...
filler=/lib/modules/
...
echo "*** populate filesystem, pass #1" | tee -a $seqres.full
cp -rf $filler $SCRATCH_MNT/subdir >$seqres.full 2>&1
...
"

It works most of the time as "/lib/modules" is usually larger than 50M,
but it may not fullfil the fs with 256M size.

I think we should fix the way to fill the fs too.

Thanks,
Eryu

>  _scratch_mount
>  mkdir $SCRATCH_MNT/subdir
> -- 
> 1.8.3.1
> 



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