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Re: [PATCH][RESEND] xfstests: only run generic/300 on filesystems suppo

To: Eric Whitney <enwlinux@xxxxxxxxx>
Subject: Re: [PATCH][RESEND] xfstests: only run generic/300 on filesystems supporting
From: Eric Sandeen <sandeen@xxxxxxxxxx>
Date: Fri, 06 Sep 2013 14:51:48 -0500
Cc: xfs@xxxxxxxxxxx, linux-ext4@xxxxxxxxxxxxxxx
Delivered-to: xfs@xxxxxxxxxxx
In-reply-to: <20130906194243.GA19286@wallace>
References: <20130906194243.GA19286@wallace>
User-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.8; rv:17.0) Gecko/20130801 Thunderbird/17.0.8
On 9/6/13 2:42 PM, Eric Whitney wrote:
> Generic/300 fails when run on a test filesystem that does not support
> fallocate(), as in the case of an ext4 filesystem created without the
> extent feature.  It uses fio's falloc ioengine to generate part of its
> I/O load.
> 
> Verify that the test filesystem supports fallocate() before proceeding
> with the test.  Also, delete any pre-existing test output to avoid
> confusion with old results.

Hey Eric - sorry this got missed for review.

Since the test doesn't actually use xfs_io it seems like slightly the
wrong check, maybe we need a new _require_fio_falloc()?

But xfs_io will almost always be installed for someone running
xfstests, and the check as you have it will indeed test that the fs
can do fallocate; it's just not the most targeted test.

It's probably ok, though - a comment about why you _require_xfs_io
when xfs_io isn't used might be good.

What do you think?

-Eric

> Signed-off-by: Eric Whitney <enwlinux@xxxxxxxxx>
> ---
>  tests/generic/300 |    3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/tests/generic/300 b/tests/generic/300
> index 7c60728..1ac763b 100755
> --- a/tests/generic/300
> +++ b/tests/generic/300
> @@ -43,6 +43,9 @@ _supported_fs generic
>  _supported_os Linux
>  _need_to_be_root
>  _require_scratch
> +_require_xfs_io_falloc
> +
> +rm -f $seqres.full
>  
>  NUM_JOBS=$((4*LOAD_FACTOR))
>  BLK_DEV_SIZE=`blockdev --getsz $SCRATCH_DEV`
> 

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