linux-ext4 - Re: [PATCH 1/9] ext4/003: Fix this test on 64K platform for dax config

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Date:   Wed, 30 Jun 2021 12:27:21 -0400
From:   "Theodore Ts'o" <tytso@....edu>
To:     Ritesh Harjani <riteshh@...ux.ibm.com>
Cc:     fstests@...r.kernel.org, linux-ext4@...r.kernel.org
Subject: Re: [PATCH 1/9] ext4/003: Fix this test on 64K platform for dax
 config

On Mon, Jun 14, 2021 at 11:58:05AM +0530, Ritesh Harjani wrote:
> mkfs.ext4 by default uses 4K blocksize which doesn't mount when testing
> with dax config and the test fails. This patch fixes it.
> 
> Signed-off-by: Ritesh Harjani <riteshh@...ux.ibm.com>
> ---
>  tests/ext4/003 | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/tests/ext4/003 b/tests/ext4/003
> index 00ea9150..1ddb3063 100755
> --- a/tests/ext4/003
> +++ b/tests/ext4/003
> @@ -31,7 +31,8 @@ _require_scratch_ext4_feature "bigalloc"
>  
>  rm -f $seqres.full
>  
> -$MKFS_EXT4_PROG -F -O bigalloc -C 65536  -g 256 $SCRATCH_DEV 512m \
> +BLOCK_SIZE=$(get_page_size)
> +$MKFS_EXT4_PROG -F -b $BLOCK_SIZE -O bigalloc -C 65536  -g 256 $SCRATCH_DEV 512m \
>  	>> $seqres.full 2>&1
>  _scratch_mount

Thanks for the patch!

If the block size is 64k, then the cluster_size == block_size at which
point ext4/003 won't be able to test for the regression its designed
to test.  So we probably need to scale the cluster size and file
system size relative to the block size.

					- Ted