Re: [PATCH v2 5/6] generic/413, xfs/260: Improve format operation for PMD fault testing

["Darrick J. Wong" <darrick.wong@oracle.com>]

On Wed, Jun 17, 2020 at 05:32:03PM +0800, Xiao Yang wrote:
> From: Xiao Yang <yangx.jy@cn.fujitsu.com>
> 
> 1) Simple code and fix the wrong value of stripe_width by _scratch_mkfs_geom().
> 2) Get hugepage size by _get_hugepagesize() and replace fixed 2M with
>    hugepage size because hugepage size/PMD_SIZE is not 2M on some
>    arches.(e.g. hugepage size/PMD_SIZE is 512M on arm64)
> 3) For debugging, redirect the output of mkfs to $seqres.full.
> 
> Signed-off-by: Xiao Yang <yangx.jy@cn.fujitsu.com>
> ---
>  common/rc         |  7 +++++++
>  tests/generic/413 | 10 ++--------
>  tests/xfs/260     |  4 ++--
>  3 files changed, 11 insertions(+), 10 deletions(-)
> 
> diff --git a/common/rc b/common/rc
> index bde26010..4852b21b 100644
> --- a/common/rc
> +++ b/common/rc
> @@ -170,6 +170,13 @@ _get_filesize()
>      stat -c %s "$1"
>  }
>  
> +# get hugepagesize in bytes
> +_get_hugepagesize()
> +{
> +	local hugepgsz=$(awk '/Hugepagesize/ {print $2}' /proc/meminfo)
> +	echo $((hugepgsz * 1024))
> +}
> +
>  _mount()
>  {
>      $MOUNT_PROG `_mount_ops_filter $*`
> diff --git a/tests/generic/413 b/tests/generic/413
> index 19e1b926..dfe2912b 100755
> --- a/tests/generic/413
> +++ b/tests/generic/413
> @@ -111,14 +111,8 @@ do_tests()
>  	t_mmap_dio_dax $((64 * 1024 * 1024))
>  }
>  
> -# make fs 2Mb aligned for PMD fault testing
> -mkfs_opts=""
> -if [ "$FSTYP" == "ext4" ]; then
> -	mkfs_opts="-E stride=512,stripe_width=1"
> -elif [ "$FSTYP" == "xfs" ]; then
> -	mkfs_opts="-d su=2m,sw=1"
> -fi
> -_scratch_mkfs "$mkfs_opts" > /dev/null 2>&1
> +# make fs aligned for PMD fault testing
> +_scratch_mkfs_geom $(_get_hugepagesize) 1 >> $seqres.full 2>&1

These _get_hugepagesize callsites ought to _notrun the test or something
if the relevant data cannot be extracted from /proc/meminfo.

Other than that, I like the way this looks. :)

--D

>  
>  # mount SCRATCH_DEV with dax option, TEST_DEV not
>  export MOUNT_OPTIONS=""
> diff --git a/tests/xfs/260 b/tests/xfs/260
> index fbdc4cd8..7afc20f1 100755
> --- a/tests/xfs/260
> +++ b/tests/xfs/260
> @@ -121,8 +121,8 @@ do_tests()
>  	t_dax_flag_mmap_dio $((64 * 1024 * 1024))
>  }
>  
> -# make xfs 2Mb aligned for PMD fault testing
> -_scratch_mkfs "-d su=2m,sw=1" > /dev/null 2>&1
> +# make xfs aligned for PMD fault testing
> +_scratch_mkfs_geom $(_get_hugepagesize) 1 >> $seqres.full 2>&1
>  
>  # mount with dax option
>  _scratch_mount "-o dax"
> -- 
> 2.21.0
>